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Electronic chip-carrier heat sinks

  • US 4,679,118 A
  • Filed: 07/28/1986
  • Issued: 07/07/1987
  • Est. Priority Date: 08/07/1984
  • Status: Expired due to Fees
First Claim
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1. An electronic chip-carrier mounting and heat sink, comprising a socket of insulating material having an outwardly-projecting array of electrical leads disposed for connection with circuit-board wiring and an inner array of electrical contacts framing an upwardly-opened recess in said socket and disposed to engage edge contacts of a leadless chip carrier which may be nested therein and thereby couple such edge contacts with said leads, and a single-piece composite heat-sink and cover means stamped from sheet metal having good thermal conductivity and adapted for dissipation of heat from such a carrier which may be nested in said recess and for movements between a closed position in which it presses against and closes over such a carrier and an open position in which it releases such a carrier from said socket, said composite heat-sink and cover means including a relatively broad-area central heat-sink portion having a substantially planar and uninterrupted lower heat-transfer surface disposed to press against a surface of the same size and shape as the top of such a carrier nested in said recess and further having stamped sheet-metal heat-radiating members integral therewith along edges thereof bent to extend upwardly away from said surface and from the top of such a carrier, said heat-transfer surface of said central portion conducting heat from such a carrier laterally to said heat-radiating members along said edges thereof and said heat-radiating members in turn convectively releasing the heat to an ambient atmosphere, and said composite heat-sink and cover means including fastener means disposed laterally beyond the periphery of said central heat-sink portion, said fastener means selectably cooperating with fastener provisions on said socket in allowing said composite heat-sink and cover means to move between the said open and closed positions and in releasably holding it closed over such a carrier.

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