| Blackout Lighting for Vehicles. |
07 JUL 1981 |
|
| Authors:
Valentine M. Sobota; Marshall Vinson; DEPARTMENT OF THE ARMY WASHINGTON DC
|
 | Four red light emitting diodes are embedded in a synthetic resin encapsulant. Two diodes in each of two pairs are connected in parallel and the two pairs are connected in series with a resistance, a blocking diode, and an on-off switch. A fifth diode which emits yellow light when energized is connected in series with a resistance, a blocking diode, and a brake-actuated switch. (Author) |
|
| Sonar Transducer Reliability Improvement Program (STRIP) FY 81 |
01 JUL 1981 |
|
| Authors:
R. W. Timme; NAVAL RESEARCH LAB WASHINGTON DC
|
| During the third quarter of FY81, efforts in the various tasks of STRIP have resulted in progress toward the program goals as summarized below: The voltage at which corona forms about electrodes and hook-up wires in a transducer configuration has been quantified in the laboratory and verified in an actual transducer design. An investigation of the effects of using unshielded electrical cable exterior to the submarine hull on the performance ... |
|
| Improved High Voltage Encapsulants through In Situ Fiber Reinforcement. |
JUL 1981 |
|
| Authors:
C. H. Sherwood; R. E. Kelchner; HUGHES AIRCRAFT CO CULVER CITY CA AEROSPACE GROUPS
|
| This report describes an engineering development program which was conducted to evaluate the benefits of using in situ formed fibers as a reinforcement for the solid encapsulant of production high voltage electronic devices. The devices used were the diode bridge module of a Travelling Wave Tube amplifier circuit & both ends of the Travelling Wave Tube itself. The fibers were produced via flow induced crystallization by agitation of the electronic ... |
|
| Semiconductor Encapsulant for Annealing Ion-Implanted GAAS. |
12 MAY 1981 |
|
| Authors:
John E. Davey; Aristos Christou; Harry B. Dietrich; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A method is described for protecting an ion-implanted substrate during the annealing process by covering the ion-implanted layer with a suitable encapsulant. A thin layer of ions are implanted into a GaAs substrate. A protective layer of germanium, amorphous GaAs, doped GaAs, or GaAlAs is applied over the implanted layer and on the periphery of the ion-implanted GaAs substrate. The composite is annealed at a temperature which is adequate for ... |
|
| Curing and Molding of Plastics Used in Scatterable Mines |
MAY 1981 |
|
| Authors:
Donald Vanderbilt; ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND DOVER NJ LARGE CALIBER WEAPON SYSTEMS LAB
|
| The effect of ATC-3 accelerator on the curing time of the epoxy encapsulating the ADAM scatterable mine was investigated by Honeywell, Inc. Curing time was reduced but so were physical properties, which became unacceptably low. Anhydrides, which did not have time to react in the presence of the ATC-3 accelerator and which acted as a plasticizer, are the presumed cause of the low values. The curing effect of ultraviolet radiation ... |
|
| Growth and Characterization of Bulk, Semi-Insulating Gallium Arsenide |
MAY 1981 |
|
| Authors:
R. L. Ross; T. R. AuCoin; R. O. Savage; J. J. Winter; R. O. malik; ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY/DEVICES LAB
|
| The physical and electrical properties of GaAs show it to be an important semiconductor material for use in various electronic devices associated with advanced military systems. However, the realization of enhanced device performance has been delayed, partly due to the lack of consistent, high quality, semi-insulating GaAs substrate material. A modified liquid-encapsulated Czochralski technique employing pressure-assisted, in-situ compounding is described. This process, first demonstrated in the United States by the ... |
|
| Evaluation Selection of Encapsulating Plastics for Ordnance Electronic Assemblies |
MAY 1981 |
125 pages |
| Authors:
Stephen J. Price; R. E. Isliefson; R. J. Ryan; Allan Goldberg; HONEYWELL INC HOPKINS MN DEFENSE SYSTEMS DIV
|
 | A program was conducted to evaluate new plastics for encapsulating ordnance electronic circuits. Various candidate plastics including foams, syntactic resins, filled systems, semirigids, elastomers and molded thermoplastics and thermosets were evaluated through extensive mechanical and environmental tests followed by encapsulation of test circuits. Additionally, a relative cost comparison of the various material categories was conducted to identify and quantify cost drivers. |
|
| Research and Development of Wound Dressing in Maxillofacial Trauma |
15 APR 1981 |
|
| Authors:
David L. Williams; James H. Kerrigan; BIOTEK INC WOBURN MA
|
| Three kilograms of poly-L-((-)lactide have been synthesized for this contract and for Contract No. DAMD 17-80-C-0110. This polymer has a viscosity (R.S.V.) of 1.19 dl.g, a molecular weight (MWw) of 45,700 and a polydispersity of 2.14. Material from a previous contract was used for preliminary experiments. Avitene mat has been obtained from FMC which can be used as a collection element for the non-woven fabric. Povidone-iodine (PVP-I2) from Napp (Co.) ... |
|
| Local Anesthetic Microcapsules |
15 APR 1981 |
|
| Authors:
David L. Williams; James H. Kerrigan; William A. Nucefora; BIOTEK INC WOBURN MA
|
| Three kilograms of poly-L(-)lactide has been synthesized for this contract and for Contract No. DAMD 17-80-C-0093. This polymer has a viscosity (R.S.V.) of 1.19 dl/g, a molecular weight (MWw) of 45,700 and a polydispersity of 2.14. Materials from a previous contract was used for preliminary experiments. Both lidocaine (HC1) and etidocaine (HC1) have been successfully micro-encapsulated using the Wurster coating process. Samples were taken at 10, 20, 30, 40, and ... |
|
| Properties of Polystyrene Bead Foam as an Encapsulant for Electronic Packages |
APR 81 |
14 pages |
| Authors:
D. J. Fossey; D. C. Dyer; L. L. Holland; G. D. Swanson; K. A. Walburn; BENDIX CORP KANSAS CITY MO KANSAS CITY DIV
|
| Polystyrene bead foam (PSBF) was evaluated as an encapsulant for electronic packages. Various properties of PSBF pertinent to the expected environmental conditioning of a prototype electronic package were determined and evaluated for their effects on individual electronic components, within the package. It was determined that PSBF densities of 0.2 to 0.4 g/cm3 provided adequate protection without damaging fragile electronic components. PSBF densities above 0.4 g/cm3 provide adequate protection from the ... |
|
| Liposomal-Encapsulated Stroma-Free Hemoglobin as a Potential Blood Substitute |
27 MAR 1981 |
|
| Authors:
C. A. Hunt; CALIFORNIA UNIV SAN FRANCISCO
|
| A new emulsion encapsulation procedure was developed that dramatically increased efficiency of stroma-free hemoglobin (SFH) encapsulation yielding hemoglobin containing liposomes (HCL) ranging in size from 0.05 to 1.0 microns in diameter. There was little or no binding of SFH to these HCL and O2 binding properties were essentialy the same as for solution of SFH. These HCL were less sensitive to osmotic shock than are RBC's and were stable for ... |
|
| Resilient Band Structure. |
19 MAR 1981 |
|
| Authors:
Algis L. Lapsys; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| An annular resilient band structure designed for installation on a ground vehicle to provide tractive propulsion force and vehicle suspension force. Resilient suspension function is achieved by an annular resilient leaf spring core encapsulated within an elastomeric sheath. Load transfer between the ground or vehicle and the band structure is obtained by means of plies or cords trained along the surfaces of the core between non-extensible beads at opposite side ... |
|
| Basic Problems in InP Technology. |
MAR 1981 |
|
| Authors:
K. V. Vaidyanathan; H. L. Dunlap; R. A. Jullens; C. L. Anderson; HUGHES RESEARCH LABS MALIBU CA
|
| The growth and characteristics of high-purity epitaxial InP layers grown by liquid phase epitaxy are described. Silicon and sulfur will be the dominant residual donors in LPE-grown InP. Techniques to reduce the residual donor concentration in the LPE layers are discussed. Chemical polishing the mesa etching of InP and ohmic contact studies to n- and p-type InP are discussed. preliminary investigations show that at power densities of 50,000 W per ... |
|
| Development of a Methodology for the Rapid Detection of Coliform Bacteria. |
27 FEB 1981 |
|
| Authors:
F. Pinteno; E. Findl; BIORESEARCH INC FARMINGDALE NY
|
| Work has continued on the development of a rapid method for the enumeration of coliform bacteria, based on the hydrolysis of a fluorogenic substrate by the enzyme beta-D-galactosidase. A validation of the basic manual technique was completed using both laboratory and field samples. A correlation between the percentage of microdroplets and the log of the bacterial concentration was established in both cases. A semiautomated version of the manual technique was ... |
|
| LSI/VLSI Ion Implanted GaAs IC (Integrated Circuits) Processing |
FEB 81 |
|
| Authors:
R. Zucca; S. I. Long; F. S. Lee; P. Asbeck; A. Firstenberg; ROCKWELL INTERNATIONAL THOUSAND OAKS CA MICROELECTRONICS RESEARCH AND DEVELO PMENT CENTER
|
| This report covers the first quarter of a program aimed at fully realizing the potential of GaAs for digital integrated circuits employing depletion mode MESFETs. The highlight of this first quarter is the successful operation of the 8 x 8 bit parallel multiplier having 1008 gates, fabricated from mask AR5 of a previous ARPA program. This result completes the demonstration of the feasibility of high-speed low-power LSI (>1000 gates) GaAs ... |
|
| Feasibility of Ceramic Lined Gun Tube. |
FEB 1981 |
|
| Authors:
Robert A. Giles; Ernst Bunning; Dave Claxton; Joseph A. Lannon; MAREMONT CORP SACO ME SACO DEFENSE SYSTEMS DIV
|
| A feasibility study was initiated to evaluate use of a ceramic liner to prevent rapid wear and erosion of the tube bore. An alpha silicon carbide liner was fabricated, inserted into a barrel, and test fired successfully. The liner performance provides support for further investigation and testing. |
|
| An Investigation of Membrane-Encapsulated Trypanocides |
15 JAN 1981 |
|
| Authors:
K. J. Hwang; UNIV OF WASHINGTON SEATTLE
|
| This progress report describes our research in studying the in vivo properties of liposomes as a potential drug carrier for trypanocidal agents. The first section discusses the effect of chemical composition, size, and concentration on the degradation of liposomes in the liver of a mouse. The second section describes the effects of various factors on the clearance of liposomes in the blood of mice. The third section is a report ... |
|
| Sea-Based Deployment of Floating-Launch Missiles (Near-Term and Far-Term Design Concepts for Sea-Based Surface Mobile MX Missile Deployment) |
15 DEC 1980 |
73 pages |
| Authors:
John E. Draim; HYDRA CORP VIENNA VA
|
| This report presents systems concept descriptions for sea-based MX missiles, using surface ships as transporters. Near-term (1985-1990) and far- term (1990-2000) systems are described. Floating-launch methods are proposed, using either encapsulated missiles or the simpler (bare) HYDRA-type vertical floating launch. Parameters described include: force composition, missile jettison techniques, port facilities, deployment areas, personnel requirements, system costs, vulnerability, countermeasures, and C3 considerations. (Author) |
|
| Sea-Based Deployment of Floating-Launch Missiles. Appendices |
15 DEC 1980 |
|
| Authors:
John E. Draim; HYDRA CORP VIENNA VA
|
| The basic report presents systems concepts descriptions for sea-based MX missiles, using surface ships as transporters. Near-term (1985-1990) and far- term (1990-2000) systems are described. Floating launch methods are proposed, using either encapsulated missiles or the simpler (bare) HYDRA-type vertical floating launch. Parameters described include: force composition, missile jettison techniques, port facilities, deployment areas, personnel requirements system costs, vulnerability, countermeasures, and C3 considerations. Appendices include containerships and surface effects ships ... |
|
| Controlling NSW (National Software Works) Tools and Configurations Under OS/MVT |
01 DEC 80 |
|
| Authors:
D. DeLa Roca; N. Ludlam; CALIFORNIA UNIV LOS ANGLES OFFICE OF ACADEMIC COMPUTING
|
| This report covers technical development at University of California (UCLA) relating to the National Software Works (NSW) during 1979. It is primarily concerned with the design implementation and configuration of mechanisms required to execute tool programs at UCLA under NSW, i.e., a FOREMAN for interactive tools, and a BATCH JOB PACKAGE for batch tools. Keywords: National Software Works, Configuration management, FOREMAN, Encapsulator, Command interpreter, Batch job package. |
|
| Manufacturing Methods and Technology for Electromagnetic Components. Volume I. Phase I. |
DEC 1980 |
|
| Authors:
Earle R. Bunker; James R. Arnett; John L. Williams; HUGHES AIRCRAFT CO CULVER CITY CA ELECTRO-OPTICAL AND DATA SYSTEMS DIV
|
| Various techniques for the manufacture to low cost, high reliability core type transformers/inductors for missile system applications were investigated and evaluated. A typical missile C core high voltage inductor and toroidal core high voltage transformer were selected as representative test items. Molding technologies ranged from silicone or slush molds for low quantities, individually pressurizable hard models to liquid injection mold (LIM) with transfer presses. Over 40 encapsulation thermo setting compounds ... |
|
| Manufacturing Methods and Technology for Electromagnetic Components. Volume II. Phase II. |
DEC 1980 |
223 pages |
| Authors:
Earle R. Bunker; James R. Arnett; King H. Li; John L. Williams; HUGHES AIRCRAFT CO CULVER CITY CA ELECTRO-OPTICAL AND DATA SYSTEMS DIV
|
| Various techniques for the manufacture of low cost, high reliability core type transformers/inductors for missile system applications were investigated and evaluated. A typical missile 'C' core high voltage inductor and toroidal core high voltage transformer were selected as representative test items. Molding technologies ranged from silicone or 'slush' molds for low quantities (100's/month), individually pressurizable hard molds (1000's/month), to liquid injection mold (LIM) with transfer presses (10,000/month). Over 40 encapsulation ... |
|
| The Causes of Defects in Semiconductor Devices Sealed in Plastic, |
28 NOV 1980 |
|
| Authors:
Janusz Nowacki; Katarzyna Szyszej; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| The defects in semiconductor devices such as diodes, transistors or integrated circuits may be caused by a number of factors. Basic defects occur most often under the influence of such factors as impurities, various mechanical affects, or humidity, and are generated primarily in the course of production. The effect of impurities in reducing the reliability of integrated circuits is discussed. Impurities may be introduced at any stage of production from ... |
|
| An Assessment of Small Submarines and Encapsulation of Ballistic Missiles--Phase 2 Survey |
NOV 1980 |
37 pages |
| Authors:
SYSTEM PLANNING CORP ARLINGTON VA
|
| A survey of previous studies on missile encapsulation was conducted. Based upon the results of this survey, it was concluded that a Phase II study effort as originally specified in the study directive is not warranted. |
|
| Sonar Transducer Reliability Improvement Program FY 80 |
01 OCT 1980 |
67 pages |
| Authors:
R. W. Timme; NAVAL RESEARCH LAB WASHINGTON DC
|
| Progress accomplished during the fourth quarter of FY80 in the Sonar Transducer Reliability Improvement Program (STRIP) is reported. Each of the 6 major task areas is discussed in detail. Goals completed this quarter include: Accelerated life testing (ALT) of the TR-316 transducers has shown air bubbles of substantial size may form during operation. At present, the air bubbles have not affected the acoustic performance sufficiently to be out of specification. ... |
|
| GaAs Surface Passivation for Device Applications. |
OCT 1980 |
|
| Authors:
C. L. Anderson; M. D. Clark; HUGHES RESEARCH LABS MALIBU CA
|
| This report describes the progress in the second six-month period of a program to develop deposited dielectrics for GaAs device applications. Three applications of the dielectrics are being investigated: (1) isolation of control electrodes, (2) passivation of the GaAs surface, and (3) encapsulation of completed circuits. The dielectrics being studied include silicon oxynitride; mixtures of silicon nitride and germanium nitride; and mixtures of silicon dioxide, gallium oxide, and aluminum oxide. ... |
|
| Multi-Transducer Dummy Unit Evaluation of Polystyrene Bead Foam as an Encapsulant for Electronic Packages |
SEP 80 |
59 pages |
| Authors:
G. D. Swanson; ALLIED BENDIX AEROSPACE KANSAS CITY MO
|
| A dummy electronic assembly without electronic components was used to measure loadings and deflections caused by 0.2, 0.3, 0.4, 0.5 and 0.6 g/cm3 densities of polystyrene bead foam during fusion and thermal cycling. Previously developed and proven transducers showed that the lower three densities caused low and safe loads and deflections, but that the highest two densities must be used with care for fragile electronic components. |
|
| Controlled Atmosphere Annealing of Ion Implanted Gallium Arsenide. |
AUG 1980 |
|
| Authors:
C. L. Anderson; V. Eu; M. Feng; W. B. Henderson; H. B. Kim; HUGHES AIRCRAFT CO TORRANCE CA TORRANCE RESEARCH CENTER
|
| Controlled atmosphere techniques were developed as an alternative to dielectric encapsulation for the high temperature anneal of ion implanted layers in GaAs. Two approaches: (1) the controlled atmosphere technique (CAT), and (2) the melt controlled ambient technique (MCAT) have been investigated. Using the CAT procedure, which involves annealing in flowing hydrogen with an arsenic overpressure, annealing without detectable surface erosion, has been performed at temperatures as high as 950 C, ... |
|
| Reliability Evaluation of Plastic Encapsulated Hybrid Microcircuits Developed for Army Fuze Applications. |
AUG 1980 |
|
| Authors:
Edward B. Hakim; John Erickson; ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY/DEVICES LAB
|
| A major Army rocket system may incorporate the use of an electronic fuze timer fabricated using two plastic encapsulated hybrid microcircuits and one encapsulated monolithic integrated circuit. The Electronics Technology and Devices Laboratory at Fort Monmouth, New Jersey was tasked with assessing the storage reliability of these devices through accelerated testing and detailed failure analysis to determine failure mechanisms. From this analysis, corrective actions would be proposed which could permit ... |
|
| Sonar Transducer Reliability Improvement Program (STRIP) FY80. |
01 JUL 1980 |
|
| Authors:
Robert W. Timme; NAVAL RESEARCH LAB WASHINGTON DC
|
| Several goals completed during this quarter include: the current phase of research on TCP for use as a transducer fill-fluid; investigation of the strength of shielded and unshielded MIL-C-915/8E cable types; and the first draft of the handbook for connector and cable harness design was partially completed. Progress in other task areas included: CUALT performed on two DT-605 hydrophones which simulated 3 years of life service; and three TR-155F transducers ... |
|
| GaAs FET Device Fabrication and Ion Implantation Technology |
25 JUN 1980 |
26 pages |
| Authors:
Kenneth J. Sleger; Harry B. Dietrich; NAVAL RESEARCH LAB WASHINGTON DC
|
| Microwave device fabrication and evaluation in conjunction with ion implantation has been selected to provide a benchmark technology for evaluation of semi-insulating GaAs and InP grown at NRL and elsewhere. Devices have been processed by a combination of conventional contact photolithography and liftoff techniques to achieve geometries with linewidths as small as 0.8 microns. A plasma deposited layer of Si3N4 has been employed as an annealing encapsulant at temperatures between ... |
|
| Disposal of Soluble Salt Waste from Coal Gasification, |
JUN 1980 |
|
| Authors:
Charles E. McKnight; ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND ABERDEEN PROVING GROUND MD CHEMICAL SYSTEMS LAB
|
| This paper addresses pollutants in the form of soluble salts and resource recovery in the form of water and land. A design for disposal of soluble salts has been produced. The interactions of its parameters have been shown by a process design study. The design will enable harmonious compliance with United States Public Laws 92-500 and 94-580, relating to water pollution and resource recovery. In the disposal of waste salt ... |
|
| An Assessment of Small Submarines and Encapsulation of Ballistic Missiles. Phase I. Executive Summary. |
MAY 1980 |
|
| Authors:
SYSTEM PLANNING CORP ARLINGTON VA
|
| This document presents an unclassified version of the Executive Summary from SPC Final Report 554 entitled An Assessment of Small Submarines and Encapsulation of Ballistic Missile--Phase I (U). This report documented the results of a classified study performed by System Planning Corporation (study director), the Naval Sea Systems Command, and Lockheed Missiles and Space Company for the Chief of Naval Operations. The unclassified Executive Summary is intended only to familiarize ... |
|
| Quartz Crystal Fabrication Facility. |
MAY 1980 |
|
| Authors:
R. J. Ney; ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ
|
| The report describes the design and operation of a five chamber, interconnected vacuum system, which is capable of cleaning, plating, and sealing precision quartz crystal units in ceramic flatpack enclosures continuously in a high vacuum environment. The production rate design goal was 200 units per eight hour day. A unique nozzle beam gold deposition source was developed to operate for extended periods of time without reloading. The source puts out ... |
|
| Sonar Transducer Reliability Improvement Program FY 80. |
01 APR 1980 |
|
| Authors:
Robert W. Timme; NAVAL RESEARCH LAB WASHINGTON DC
|
| Progress accomplished during the second quarter of FY80 in the Sonar Transducer Reliability Improvement Program is reported. Each of the six major task areas is discussed in some detail. The most significant aspects include continued investigation of candidate fill-fluids for transducers; information gained from CUALT on the TR-316 projector which had immediate application to the TR-242 projector of the AN/BQS-15 system; results of CUALT performed on 2 DT-605 hydrophones which ... |
|
| GaAs Surface Effects. |
MAR 1980 |
|
| Authors:
G. Kinoshita; Gordon G. Kuhlmann; ROCKWELL INTERNATIONAL ANAHEIM CA ELECTRONIC DEVICES DIV
|
| This report presents the results of the first six months of a program to investigate the passivation of GaAs surfaces using a native insulator. Ion implantation of phosphorus and subsequent oxidation of the surface was used to form the insulator. Post-implant annealing indicates that CVD SiO2 has somewhat better encapsulating properties than sputtered Si3N4. It was found that high-dose phosphorus implantation significantly reduces decomposition of the semiconductor surface under the ... |
|
| Ship Escape and Survival System. |
12 FEB 1980 |
|
| Authors:
David N. De Simone; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This invention relates to a personnel evacuation and survival device for individual crewmen aboard ship having a quick don harness to which is attached a personnel lowering device and an automatically deployable encapsulating life raft. From an appropriate evacuation station aboard the ship, the crewman uses the device to suspend himself clear of the side and lower himself on a lifeline, the pay-out of which is controlled to provide a ... |
|
| An Investigation of Membrane-Encapsulated Trypanocides |
15 JAN 1980 |
|
| Authors:
Karl J. Hwang; UNIV OF WASHINGTON SEATTLE
|
| A new method which is capable of entrapping 111 In 3+ in any types of liposomes with an efficiency of 80% about 90% has been developed. There are no differences in the physical properties and biodistribution between the liposomes encapsulating 111 In 3+ by this new loading method and that by the conventional method of encapsulation. Hepatic degradation of sphingomyelin:cholesterol (2/1; M/M) unilamellar liposomes is investigated by the combined approaches ... |
|
| Liposomal-Encapsulated Stroma-Free Hemoglobin as a Potential Blood Substitute |
02 JAN 1980 |
|
| Authors:
C. A. Hunt; CALIFORNIA UNIV SAN FRANCISCO
|
| We have successfully applied a new technique of high-yield encapsulation for liposome encapsulation of stroma-free hemoglobin (SFH). The procedure results in encapsulation of approximately 20% of a given SFH solution. The resulting hemoglobin-containing liposomes (HCL) range in size from approximately 0.05 to 1.0 microns in diameter. There is little or no binding of hemoglobin to these liposomes. The oxygen binding properties of the HCL are equal to or better than ... |
|
| Autoclave Testing of Plastic Encapsulated 4001 CMOS Integrated Circuits. |
JAN 1980 |
|
| Authors:
Richard Holecinski; ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY/DEVICES LAB
|
| Samples from 10 vendors of CMOS 4001 plastic encapsulated integrated circuits were tested in an autoclave at 121 C, 100% RH and 15 psig with and without electrical bias. Twenty-nine test groups of 16 circuits each accumulated over 200,000 device hours. Failure analyses were performed to verify moisture related electrochemical aluminum metal corrosion on the die. Weibull failure distributions showed large differences in moisture resistance reliability among the various vendor ... |
|
| Improvement in GaAs Device Yield and Performance through Substrate Defect Gettering. |
JAN 1980 |
|
| Authors:
T. J. Magee; J. Peng; J. Hong; R. A. Armistead; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
|
| The gettering of Cr and front-surfaces defects by mechanically produced back-surface damage in semi-insulating GaAs wafers has been investigated. It has been shown that improved VPE layers can be grown on pre-gettered substrates. Also, the level of Cr outdiffusing from the substrate during epilayer growth and subsequent annealing is substantially reduced when pre-gettered substrates are used. Thermal stability times of back-surface damage at an anneal temperature of 800 C is ... |
|
| Electrical Properties and Photoluminescence of Germanium-Implanted Gallium Arsenide. |
DEC 1979 |
|
| Authors:
Siu-Sing Chan; ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB
|
| The data presented show that Ge-implanted GaAs has a complex amphoteric behavior which is controlled by the implantation dose, implantation temperature and anneal temperature. Annealing was performed with r.f. plasma deposited Si3N4 as the encapsulant. Implantations at -100 C resulted in p-layers while those performed at 100 C and above resulted in n-layers regardless of the dose and anneal temperature. Room temperature implants resulted in p- or n-layers depending on ... |
|
| Research and Development in Preventive Dentistry |
DEC 1979 |
|
| Authors:
J. R. Lawter; D. L. Williams; K. R. St. John; B. W. Tenney; ABCOR INC WILMINGTON MA BIOMEDICAL DIV
|
| Lidocaine hydrochloride was microencapsulated in a biodegradable polymer, polyL(-) lactide, using an air suspension coating technique. Eight coating runs produced microcapsules of various sizes and polymer/drug ratios. The final run (L-8) produced 50% drug microcapsules. These microcapsules of 125- 149 micrometers size range, released about 50% of their drug in 2.5 hours into an agitated aqueous solution at 37deg C. Anesthesia was demonstrated using the sciatic nerve block test in ... |
|
| Sonar Transducer Reliability Improvement Program FY 1979. |
01 OCT 1979 |
|
| Authors:
Robert W. Timme; NAVAL RESEARCH LAB WASHINGTON DC
|
| Progress accomplished during the fourth quarter of FY79 in the Sonar Transducer Reliability Improvement Program is reported. Each of the eight program tasks is discussed in some detail. The most significant aspects are the discovery of a parasitic current phenomena, different from corona, that may lead to a diagnostic test for transducers, piece-part testing in support of composite unit accelerated life testing of transducers to identify and cure failures, and ... |
|
| Dielectric Layers on III-V Semiconductors. |
OCT 1979 |
|
| Authors:
James R. Sites; COLORADO STATE UNIV FORT COLLINS DEPT OF PHYSICS
|
| Dielectric layers, particularly SiO2, Si3N4, and AlN, have been deposited on GaAs and other compound semiconductors for several purposes: (1) study of MIS structures, (2) encapsulation during annealing, and (3) electronic profiling of epitoxial layers. Development of the ion beam sputtering technique has paralleled the dielectric studies. (Author) |
|
| Indium Phosphide for High Frequency Power Transistors. |
28 SEP 1979 |
|
| Authors:
V. L. Wrick; G. W. Eldridge; R. C. Clarke; M. C. Driver ; WESTINGHOUSE RESEARCH AND DEVELOPMENT CENTER PITTSBURGH PA
|
| Technology development is presented for the development of an InP power Field Effect Transistor. Both ion implantation and vapor phase epitaxy results are presented as a means for providing an active channel. Processing technology (etching, ohmic contacts) is reviewed as well as a description of various approaches for gating n-type InP. Conclusions and plans for the last phase of the program are discussed. As a result of the first part ... |
|
| Development of a Partial-Discharge Detection System for Traveling-Wave-Tube Testing. |
28 SEP 1979 |
|
| Authors:
Francis Hai ; Kenneth W. Paschen; AEROSPACE CORP EL SEGUNDO CA MATERIALS SCIENCES LAB
|
| The development of a test system to detect and monitor partial discharges (PD) in a traveling wave tube (TWT) is described. The assembled system is capable of monitoring discharges of a magnitude ranging from 0.25 pC to above 250 nC. During this operation, the TWT can be subjected to pressures ranging from atmospheric to below .01 Torr and to temperatures ranging from -20 to +90 C. Developmental studies, which included ... |
|
| Encapsulation Studies and Planar Device Fabrication in Gallium Arsenide. |
SEP 1979 |
|
| Authors:
Max John Helix; ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB
|
| Low temperature photoluminescence and Auger electron spectroscopy (AES) are used to study SIO2 and Si3N4 as encapsulants for high temperature annealing of GaAs. These encapsulants are used in the fabrication of planar diodes in GaAs, and the resulting electrical and optical properties of the devices are examined. Silicon dioxide or silicon oxy-nitride layers allow the outdiffusion of Ga when they are used to encapsulate GaAs during high temperature annealing. .In ... |
|
| The Structure of Specifications and Implementations of Data Abstractions. |
SEP 1979 |
|
| Authors:
Mark A. Ardis ; Richard G. Hamlet; MARYLAND UNIV COLLEGE PARK DEPT OF COMPUTER SCIENCE
|
| A data abstraction is a collection of sets together with a collection of functions. An intuitive abstraction is unconnected with formalism: the sets and functions are supposed to be known ab initio. Formal ideas enter when the abstraction is (i) implemented, a conventional program written to carry out the operations on actual data; and (ii) specified, a mathematical characterization given to precisely describe its sets and functions. The intuitive abstraction, ... |
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| The Implantation of Impurity Ions and Proton Bombardment in Indium Phosphide. |
31 AUG 1979 |
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| Authors:
G. W. Eldridge; WESTINGHOUSE RESEARCH AND DEVELOPMENT CENTER PITTSBURGH PA
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| Ion Implantation of InP has been studied from qualification of substrates through characterization of the electrical transport properties of the resulting layers. InP(Fe) is found to have sufficient resistivity for typical device applications in contrast to InP(Cr). Residual damage from grit polishing compromised mobility and activation efficiency; a bromine-methanol etch polish yields superior surfaces and reduced residual damage. This etch-polish reveals either FeP precipitates or In inclusions in available InP(Fe) ... |
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