Accession Number : ADA306694

Title :   In-Situ Measurement of Total Dose Radiation Effects on Parallel Plate MOS Capacitors Using the NPS Linear Accelerator.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Abrahamson, Stuart M.

PDF Url : ADA306694

Report Date : DEC 1995

Pagination or Media Count : 99

Abstract : The study of radiation effects to electronics circuits has been ongoing almost as long as there have been satellites and spacecraft in space. The response to radiation over the planned life of the space system is of great concern to system designers. Operational amplifiers are one of the most basic elements in all electronic systems. This research examines radiation effects of part of a Metal Oxide Semiconductor (MOS) operational amplifier and is applicable to Complimentary MOS (CMOS) technology as well. More specifically, it is pertinent to MOS capacitors used to internally compensate op amps. First, a review of semiconductor theory is presented followed by a discussion of damage mechanisms to MOS capacitors and a brief look at operational amplifier fundamentals. MOS capacitors, constructed by previous research efforts using the MOSIS technique, were selected as the internally compensating elements for simple low pass filters. Using the Naval Postgraduate School linear accelerator, these capacitors were irradiated with pulsed electrons possessing energies of up to 26 MeV for varying times. In-situ measurements were taken to immediately determine the capacitance value via the measured filter break frequency as a function of fluence. Separate irradiation runs were performed on three MOSIS capacitors and were terminated upon filter failure. This research concludes with a hypothesis of the filter fallure mechanism and suggested areas for expansion of continuing research efforts. This is believed to be the first time such an experiment has been performed.

Descriptors :   *METAL OXIDE SEMICONDUCTORS, *NUCLEAR RADIATION, *SOLAR RADIATION, *RADIATION EFFECTS, *CAPACITORS, *RADIATION BELTS, SPACECRAFT, SPACE SYSTEMS, ELECTRONIC EQUIPMENT, THESES, TRAPPING(CHARGED PARTICLES), ARTIFICIAL SATELLITES, PHOTONS, SEMICONDUCTOR JUNCTIONS, CIRCUITS, IRRADIATION, COMPLEMENTARY METAL OXIDE SEMICONDUCTORS, IONIZING RADIATION, LOW PASS FILTERS, RADIATION DOSAGE, CAPACITANCE, MAGNETOSPHERE, RADIATION DAMAGE, SOLAR FLARES, FAILURE(ELECTRONICS), PHOTOELECTRIC EFFECT, LINEAR ACCELERATORS, COSMIC RAYS, COMPTON SCATTERING, OPERATIONAL AMPLIFIERS, SOLAR COSMIC RAYS.

Subject Categories : Astrophysics
      Electrical and Electronic Equipment
      Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Weapons
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE