Characteristics of GaAs DCFL MESFET's and inverters exposed to high energy neutrons
- The Aerospace Corp., Los Angeles, CA (US)
This paper reports on a systematic investigation of the effects of high-energy neutrons on GaAs metal-semiconductor field effect transistors (MESFET's) and direct coupled FET logic (DCFL) gates. Measurements were made of the threshold voltage shifts and the transconductance and saturation current degradation of GaAs enhancement and depletion mode MESFET's, which comprise the DCFL logic gates, at neutron fluences ranging from 5 {times} 10{sup 13} {minus} 2 {times} 10{sup 15} n/cm{sup 2} (E{gt}keV). DCFL inverter characteristics were measured and successfully simulated with simulation program with integrated circuit emphasis (SPICE) using device parameters extracted from the neutron damaged FET's. Ring oscillator measurements were made to determine the effects of high-energy neutrons on the frequency performance of DCFL circuits. Measurements confirm that propagation delays scale inversely with the device transconductance. The results of this investigation are useful in predicting how GaAs IC's, fabricated using DCFL logic, will perform in a high-energy neutron environment.
- OSTI ID:
- 7029241
- Report Number(s):
- CONF-890723-; CODEN: IETNA; TRN: 90-014127
- Journal Information:
- IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA), Vol. 36:6; Conference: 26. annual conference on nuclear and space radiation effects, Marco Island, FL (USA), 25-29 Jul 1989; ISSN 0018-9499
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
42 ENGINEERING
FIELD EFFECT TRANSISTORS
RADIATION HARDENING
GALLIUM ARSENIDES
INTEGRATED CIRCUITS
NEUTRON TRANSPORT
DESIGN
ENVIRONMENTAL IMPACTS
IRRADIATION
LEAKAGE CURRENT
LOGIC CIRCUITS
PERFORMANCE
SEMICONDUCTOR DEVICES
SIMULATION
ARSENIC COMPOUNDS
ARSENIDES
CURRENTS
ELECTRIC CURRENTS
ELECTRONIC CIRCUITS
GALLIUM COMPOUNDS
HARDENING
MICROELECTRONIC CIRCUITS
NEUTRAL-PARTICLE TRANSPORT
PHYSICAL RADIATION EFFECTS
PNICTIDES
RADIATION EFFECTS
RADIATION TRANSPORT
TRANSISTORS
440200* - Radiation Effects on Instrument Components
Instruments
or Electronic Systems
360605 - Materials- Radiation Effects
360601 - Other Materials- Preparation & Manufacture
426000 - Engineering- Components
Electron Devices & Circuits- (1990-)