Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1974-10-16
1976-10-12
Lovell, C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
357 71, B32B 1520
Patent
active
039855155
ABSTRACT:
A metallization system for metallurgically bonding a semiconductor die to metallic conducting slugs as terminals at the same time, and at the same temperature, that a surrounding glass sleeve is hermetically sealed to the conducting slugs for forming a zener diode, for example, is disclosed. The metallization system comprises a combination of aluminum, tin and palladium, for bonding to molybdenum, the aluminum being vapor deposited followed by a vapor co-deposition of aluminum and tin and further followed by a vapor deposited layer of palladium.
A method of making a device is disclosed wherein the die, two metal slugs of molybdenum and a preformed high temperature sealing glass are assembled together and subjected to a time-temperature cycle which includes a rapid rise to a high temperature at which metallurgical bonding of the die to the metal slugs and hermetic sealing of the glass to the metal slugs take place in a short time interval followed by rapid cooling of the assembly to a temperature slightly below the eutectic of aluminum and silicon.
REFERENCES:
patent: 3200310 (1965-08-01), Carman
patent: 3202489 (1965-08-01), Bender et al.
patent: 3409809 (1968-11-01), Diehl
patent: 3453501 (1969-07-01), Dunkle
patent: 3657611 (1972-04-01), Yoneda
Greeson Richard L.
Philofsky Elliott M.
Lovell C.
Motorola Inc.
Olsen Henry T.
Weise E. L.
Weiss Harry M.
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