PRODUCTION ENGINEERING MEASURE TO IMPROVE PRODUCTION TECHNIQUES AND INCREASE THE RELIABILITY OF THE SCL7004/21 AND SCL7004/22 TRANSISTORS.
Quarterly progress rept. no. 2, 28 Feb-31 May 66.
DELCO RADIO DIV GENERAL MOTORS CORP KOKOMO IND
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There are seven planned equipment and process modifications intended to achieve improved VRC-12 reliability by improved resistance to secondary breakdown. The alloyed boat material is 90 converted in terms of alloy caps and 14 in terms of completed boats. The resultant reduction of entrapped volatiles in the regrowth and the better maintenance of geometry is intended to reduce localized hot spots. The wafer washer, now being used as standard production, eliminates residuals and thereby provides similarly improved alloy junction quality. The alloy furnance study was initiated in this quarter and is intended to compliment the other junction improvement items. The thinner copper base is intended to improve operating capability by reducing thermal resistance. The maximum reliability operating area for the 2N2210 transistor and a detailed analysis of the VRC-12 system was completed. Sustaining voltage tests, pulse energy tests, capacitor effects, clamping of the collector diode by zener diodes, initial efforts to determine collector diode energy capability, the reliability of unusual transistor traces, and the effects of the deletion of the center base contact and dissipation testing was evaluated.
- Electrical and Electronic Equipment
- Manufacturing and Industrial Engineering and Control of Production Systems
- Radio Communications