Accession Number : AD0857136

Title :   Radiation Effects in Dielectric Materials.

Descriptive Note : Quarterly rept. no. 2, 16 Jan-15 Apr 69,

Corporate Author : GULF GENERAL ATOMIC CO SAN DIEGO CA

Personal Author(s) : Harrity, John W.

Report Date : JUL 1969

Pagination or Media Count : 22

Abstract : A nonlinearity observed in the radiation-induced conductivity versus dose rate plot for a Czochralski sapphire sample is interpreted in terms of a trapping level which is filled early in the pulse at high dose rates but is never completely filled at the low dose rates, thus causing an apparent superlinear dependence of the radiation-induced conductivity. A sample of stoichiometric (MgO . Al2O3) single crystal spinel shows strong trapping at room temperature and a long delayed conductivity component with time constant of approximately 2.3 msec. It is speculated that this trap may be the V1 center, a Mg(+) vacancy observed at elevated temperatures in single crystal MgO. (Author)

Descriptors :   *INTEGRATED CIRCUITS, *DIELECTRICS, *DAMAGE, RELIABILITY(ELECTRONICS), SUBSTRATES, SAPPHIRE, SPINEL, ELECTRICAL CONDUCTIVITY, SINGLE CRYSTALS, POLARIZATION.

Subject Categories : Electrical and Electronic Equipment
      Miscellaneous Materials
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE