Reliability through packaging design.
Relation between packaging design and cooling, vibration, RF interference and reliability of microelectronic systems used in space vehicles
COOLING SYSTEM↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Adaptable large-scale-integrated military and space systems.
Adaptable large scale integrated military and space systems, discussing microelectronic circuit, logistics and dynamic redundancy
REDUNDANT SYSTEM↗
Improved process for making thin-film sodium niobate capacitors
Sodium niobate, formed by high vacuum, flash, and reactive evaporations, has a high dielectric constant and is used as a thin film dielectric in microelectronic capacitors. High purity films are formed from relatively inexpensive, pure starting materials. Crystalline sodium niobate films can be formed on amorphous or crystalline materials.
Micka, E. Z.↗
Compilation, metallographic and related metallurgical tests
Metallurgical tests of microelectronic circuit anomalies, protective coatings, and selected alloys for space application
Grenier, W. G.↗
A miniature 1/4-inch diameter 24-pin plug and receptacle
Miniature plug and receptacle, which eliminates the need for permanent fixed leads, is used on wind-tunnel force balances, in the interface connections of microelectronic modular assemblies, and in electric and electronic systems where subsystems must be removed or interchanged.
Phelps, W. R.↗
Biomedical sensing and display concept improves brain wave monitoring
Concept for increasing effectiveness of biomedical sensing and display promises greater monitoring capability while lessening high skill requirements in operating personnel. New concept overcomes deficiencies of current system by employing increased number of probes and microelectronic preamplifiers.
Trent, R. L.↗
Composite metal-oxide device has voltage sensitive capacitance
Device with step function variation of the capacitance is useful for voltage-controlled oscillator circuits and as a voltage-sensitive switch. Simplicity of construction makes the device suitable for large-scale integration, microelectronic circuits.
Mattauch, R. J.↗
Establishing an electrical test philosophy for LSI microcircuits, volume 1 Final report, 15 May 1970 - 15 Feb. 1971
Large scale integration and metal oxide semiconductor microelectronic testing techniques including combinatorial, sequential, functional, and parametric methods
Keonjian, E.↗
Establishing an electrical test philosophy for LSI microcircuits, volume 2 Final report, 15 May 1970 - 15 Feb. 1971
Large scale integration microelectronic wafer and package testing including parametric and functional tests of combinatorial and sequential logic circuits
Keonjian, E.↗
Two autowire versions for CDC-3200 and IBM-360
Microelectronics program was initiated to evaluate circuitry, packaging methods, and fabrication approaches necessary to produce completely procured logic system. Two autowire programs were developed for CDC-3200 and IBM-360 computers for use in designing logic systems.
Billingsley, J. B.↗
Insulated-gate field-effect transistor strain sensor
Strain sensors that can be switched on and off were fabricated from p-channel IGFET on thin filament n-type silicon crystals with silicon dioxide layer sputtered over transistor for passivation. Applications include integration with microelectronic circuits for multiplexing.
Gross, C.↗
Study program of NASA/GSFC weld quality monitor system
The Weld Quality Monitor has provided online control through the application of linear transducers. The electronic systems must be upgraded to increase confidence level required in production. The Weld Quality Monitor has been used with a recent model solid state power supply to evaluate ability to differentiate between sound and defective weld joints. The Weld Quality Monitor has been evaluated on Dumet and Kovar to interconnect materials Nickel and Alloy 180 in weld joints used on microelectronic module fabrication. Distinct separation was achieved between low strength welds and sound welds by the Quality Monitor. Evaluation performed indicates a drift level at less than 2 percent on a series of 50 consecutive welds. Operation under shop conditions identified need for controlled electrode impact. This was achieved with pneumatic actuation.
Hutchinson, W. R.↗
The NAS-PAK Logic System
The design and fabrication of telemetry ground data processing equipment using commercial logic cards or modules are discussed. A microelectronics program was initiated to evaluate circuitry, packaging methods, and fabrication approaches necessary to produce a competitively procured logic system. The NAS-PAK logic system covering all phases of implementation is considered.
Billingsley, J.↗
Digital canopus tracker digital electronics
Circuitry has been developed for digital control of the Canopus tracker. A feasibility and demonstration breadboard has been constructed using microelectronic integrated circuits. The breadboard contains the digital circuits necessary for closed-digital logic necessary for star acquisition, particle rejection, programmable gate selection, cone angle selection, and routing of the digital roll error signal.
Crawford, W. E.↗
On-the-shaft data systems for rotating engine components
Two rotating data systems for engine component testing which demonstrate the techniques of on-the-shaft microelectronic signal conditioning and rotary transformer power- and data-transfer are described. (1) A digital data system provides 69 channels of 1100 C maximum thermocouple data with less than 0.5 percent error from a turbine test rig rotating at speeds up to 9000 rpm. (2) An analog data system amplifies and transfers 72 channels of dynamic strain data with less than 5 percent error from a compressor rig at speeds above 14,000 rpm.
Lesco, D. J.↗
Experimental studies and applications of vanadium oxides.
The electrical and electrochemical properties of V-5 and V-7 vanadium oxides were investigated. The effects of pressure, temperature and moisture on the bulk resistivity of the oxides in powder, sintered, and crystalline form were determined, and the static and dynamic volt-ampere characteristics were obtained. Sintered samples tested showed better electrical stability than the compressed powder samples. Two types of commercially available vanadium pentoxide were heat-treated to obtain various crystalline oxide forms which were mounted on alumina substrates and terminated by thick-film conductors for making electrical connections. Indications are that these materials could have applications as sensors, critical-temperature resistors, high-speed switches, and temperature-compensation elements in hybrid microelectronic circuits.
Williams, L., Jr.↗
High voltage solid-state relay
Hybrid microelectronics relay has characteristics significantly superior to conventional solid state relays. Relay provides 2500 Vdc input to output isolation and operates from high threshold logic signal to switch load of 400 Vdc at 2 mA. Technology should be of interest to manufacturers of discrete components.
Sater, B. L.↗