Sixty Earth-Days Test of a Prototype Pt/HTCC Alumina Package in Simulated Venus Environment

Chen, Liang-Yu ; Neudeck, Philip G ; Meredith, Roger D ; Lukco, Dorothy ; Spry, David J ; Nakley, Leah M ; Phillips, Kyle G ; Beheim, Glenn M ; Hunter, Gary W

关键词: ALUMINUM OXIDES;    ELECTRONIC PACKAGING;    ENVIRONMENTAL TESTS;    HIGH TEMPERATURE;    INTEGRATED CIRCUITS;    PLANETARY ENVIRONMENTS;    SILICON CARBIDES;    TEST CHAMBERS;    VENUS ATMOSPHERE;    ATMOSPHERIC PRESSURE;    CORROSION TESTS;    GAS PRESSURE;    HIGH TEMPERATURE TESTS;    PROTOTYPES;    VENUS (PLANET);   

RP-ID  :  GRC-E-DAA-TN56196

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

This paper presents experimental results of a prototype high temperature co-fired ceramic (HTCC) package with Au/Pt metallization in a three-phase harsh environment test that culminated with 60-day demonstration in simulated Venus surface environment of 465 degrees Centigrade with corrosive atmosphere at 90 bars pressure. The prototype package is based on a previously developed and reported HTCC package successfully tested with multiple analog and digital silicon carbide (SiC) high temperatures semiconductor integrated circuits (ICs) at NASA Glenn Research Center in 500 degrees Centigrade Earth air ambient for over ten thousand hours, and short-term tested at temperatures above 800 degrees Centigrade. The three-phase harsh environment test started with 48 hours in 465 degrees Centigrade Earth air, followed by 48 hours in 465 degrees Centigrade nitrogen at 90-bar pressure and 1400 hours in simulated Venus surface environment of 465 degrees Centigrade with corrosive atmosphere at 90 bars. Initial analytical results of the package materials and surfaces after exposure to the Venus environment are discussed to assess the stability of the packaging materials in the tested environments. The test in a simulated Venus environment was implemented in the NASA Glenn Extreme Environment Rig (GEER). The results of this study suggest that an effective encapsulation of areas of surface metallization and vicinities may help to improve electrical performance of a HTCC alumina packaging system in Venus environment.