H - Electricity – 05 – K
Patent
H - Electricity
05
K
356/6
H05K 1/02 (2006.01) H01L 23/057 (2006.01) H01L 23/482 (2006.01) H01L 23/498 (2006.01) H01L 23/538 (2006.01)
Patent
CA 1240071
ABSTRACT: "Housing for an electronic device". The invention relates to a housing for an elec- tronic device including a ceramic substrate 120 on which a multilayer circuit 110 is deposited by screen-printing, which circuit serves to bring about the connection between the terminals 7 of the said electronic device and the moun- ting pins 2 of the housing, which are provided in metallized holes in the substrate, which holes are provided with con- ducting rings (11 and 12) by means of screen-printing, characterized in that the conducting layers are formed from a compound which can be screen-printed and which comprises, at least, copper, and a vitreous-crystalline material, which compound is to be fired in a neutral atmosphere at a tem- perature which is lower than the melting temperature of copper, in that the insulating layers are formed from a vitreous-crystalline screen-printable compound which must be fired in a neutral atmosphere at a temperature which is suited for the conducting layers, the insulating com- pound having a coefficient of expansion which is adapted to that of the substrate up to its firing temperature, in that the last layer of the circuit is a protective insula- ting vitreous-crystalline layer, in that the pins have the shape of a shank provided with a flat head, which flat head rests on the ring which is located at one of the faces of the substrate, in that the pins are fixed by means of a metal alloy which is compatible with the metal coating of the holes and conducting rings, the melting temperature of which alloy is substantially the same or lower than the firing temperature of the circuit layers, in that the ter- minals of the electronic device located on the substrate are connected to the ends of the conductors by means of flexible wires, which ends are left free during the manu- facture of the multilayer circuit, and in that the elec- tronic device is protected by a cap.
498365
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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