PRODUCTION ENGINEERING MEASURE FOR HIGH RELIABILITY, FIXED, FILM, PRECISION RESISTORS.
Quarterly progress rept. no. 2, 31 Mar30 June 63,
INTERNATIONAL RESISTANCE CO PHILADELPHIA PA
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It was demonstrated that a burn-in schedule of 50 load 25 C, 1-12 hour on - 12 hour off for two weeks would guarantee an end product which would fulfill the ultimate MINUTEMAN reliability goal. A tentative plan for the complete inprocess evaluation program has been laid out, and priority levels assigned. Seventeen studies have been started. Seven of the programs are reported, they are 1 frit run on film 2 film defects 3 chemical contamination 4 irregular termination flaked 5 irregular termination rough edge 6 spiral skips and 7 outgassed frit. The XLT resistor design has been improved by changing the rigid lead to a bellows assembly, thus simplifying the automatic machine design which is proceeding on schedule. A prototype sequential sealing machine has demonstrated hermetic seals equivalent to seals made on current production. The principle of Syntron bowl feeding was found to be acceptable for terminated ceramic substrates with respect to termination inspection. The termination machine design will utilize this principle. No processing difference between helium sealed units and nitrogen sealed units was observed, a statistical difference of TC-Hi and TC-Lo was noted. A lot of 531 type ceramics was shown to improve the process yield at Film Inspection about 5. Author