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Electronic circuit configured for indicator case

  • US 5,099,396 A
  • Filed: 01/09/1990
  • Issued: 03/24/1992
  • Est. Priority Date: 02/03/1989
  • Status: Expired due to Fees
First Claim
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1. In an electronic circuit in a motor vehicle suitable for an instrument cluster comprising various indicating instruments, indicating fields, and lights arranged in a common housing and covered by a common transparent pane, the electronic circuit being formed in a structure comprising:

  • at least one ceramic substrate, said circuit including component parts disposed on the substrate and outside a central portion of the substrate;

    a printed circuit board spaced-apart from said substrate and being adapted for electrical connection with an instrument cluster;

    a shielding housing mounted on said printed circuit board and enclosing said component parts; and

    whereinsaid shielding housing has an outer surface with a recessed central portion;

    a central portion of a surface of said ceramic substrate is free of component parts of the circuit, and contacts by areal contact with a substantially congruent surface of said recessed portion of the outer surface of said shielding housing for cooling said ceramic substrate and said circuit.

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