Fishing – trapping – and vermin destroying
Patent
1987-03-25
1989-03-07
Hearn, Brian E.
Fishing, trapping, and vermin destroying
148DIG54, 148DIG12, 148 334, 148 335, 156645, 228123, 228124, 228248, 228127, 22826312, 228120, 228121, 357 67, 357 74, H01L 2120
Patent
active
048106720
ABSTRACT:
In order to secure electronic components, and particularly large-area power semiconductors, to a substrate, first a paste formed of metal powder and a solvent is applied in the form of a layer to a contacting layer of the component and/or a contact surface of the substrate. The layer of paste is then dried. When the paste has dried, the component is placed onto the substrate, whereupon the entire arrangement is heated to a relatively low sintering temperature preferably between 180.degree. C. and 250.degree. C., and with simultaneous application of a mechanical pressure of at least 900 N/cm.sup.2. A connection which is thus achieved by such a pressure sintering at relatively low sintering temperatures is particularly suitable for securing power semiconductors produced in MOS-technology to a substrate.
REFERENCES:
patent: 2390452 (1945-12-01), Mudge
patent: 3479731 (1969-11-01), Mantel et al.
patent: 3716347 (1973-02-01), Bergstrom et al.
patent: 4485961 (1984-12-01), Ekbom et al.
patent: 4574329 (1986-03-01), Eijkelenkamp et al.
J. Fellinger, W. Baumgartner, Ser. No. 3414065 English Translation of German Patent.
Hearn Brian E.
Pawlikowski Beverly A.
Siemens Aktiengesellschaft
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