H - Electricity – 05 – K
Patent
H - Electricity
05
K
356/143, 356/9
H05K 1/02 (2006.01) H01L 23/498 (2006.01) H01L 23/538 (2006.01)
Patent
CA 1211859
ABSTRACT OF THE DISCLOSURE A circuit unit is described such as performing the function of a chip carrier. In one example, it is in the form of a thin square of insulating material having contact pads arranged side by side along the four edges of both major surfaces. The chip is secured substantially centrally of the insulating material and connections are made from it to the contacts on both the major surfaces. The carrier has an insulating base having contacts extending over its under surface and carrying the chip on its upper surface. A hollow insulating spacer, matching the outside shape of the base, carrie s further edge contacts and is placed on top of the base. Electrical connections are made to the contacts on the base and the spacer. An insulating cover then closes off the hollow interior. The contacts on the spacer thus provide the contacts on the upper surface of the finished construction. A single layer construction is also disclosed. Double-sided chip carriers formed in this way are particularly suited for side-by-side mounting in racked manner, enabling maximum use to be made of the contacts on both of the major surfaces and facilitating flow of cooling air.
434207
Anstey Michael J.
Brown David F.
Anstey Michael J.
Bereskin & Parr
Brown David F.
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