Metal working – Method of mechanical manufacture – Electrical device making
Patent
1977-12-19
1979-02-06
Lanham, C.W.
Metal working
Method of mechanical manufacture
Electrical device making
29411, 174 685, 264 58, 264 61, 264 67, 156 89, H05K 322, H05K 310
Patent
active
041376285
ABSTRACT:
A method of manufacturing connection-type ceramic packages for integrated circuits is disclosed. A plurality of green ceramic sheets are prepared and punched to form notches in each sheet and recesses defining cavities for accommodating an integrated circuit element therein at predetermined positions in given sheets. A plurality of lead array patterns each corresponding to terminal areas of the element are printed on each surface of the sheets with a metallizing ink. The printed sheets are laminated one upon another while aligning with the aid of the notches under hot pressed condition to form a laminated body. The laminated body is longitudinally cut into a plurality of green ceramic strips while providing transverse snap lines for obtaining individual ceramic package units. A pattern corresponding to the lead array pattern is printed on both sides of each of the strips with a metallizing ink. The printed strip is sintered to ceramic strip, which is then subjected to a usual plating treatment. Thereafter, lead members are attached to the plated ceramic strip to form connection-type ceramic packages capable of being divided into individual ceramic package units.
REFERENCES:
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patent: 3235939 (1966-02-01), Rodriquez et al.
patent: 3518756 (1970-07-01), Bennett et al.
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patent: 3815187 (1974-06-01), Hanold
patent: 3926746 (1975-12-01), Hargis
Schwartz, B., et al., "Laminated Ceramics," from Ceramic Age, The Total Ceramic Spectrum, vol. 83, No. 6, Jun. 1967, pp. 29-625.
Crane Daniel C.
Lanham C.W.
NGK Insulators Ltd.
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