Multilayer circuit board and semiconductor device using the...

Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices

Reexamination Certificate

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C361S793000, C257S707000

Reexamination Certificate

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06891732

ABSTRACT:
A multilayer circuit board for mounting a semiconductor element thereon, comprising a core substrate of a metal material and a plurality of wiring layers stacked on either side of the core substrate, each of the stacked wiring layers being isolated from an adjacent wiring layer by an insulating layer interposed therebetween, the multilayer circuit board having an area at which a heat spreader for dissipating heat generated from the semiconductor element mounted on the circuit board is to be joined to the multilayer circuit board, wherein the multilayer circuit board allows the heat spreader to be joined to the core substrate without the insulating layers being interposed therebetween. A semiconductor device using the multilayer circuit board is also disclosed.

REFERENCES:
patent: 4963697 (1990-10-01), Peterson et al.
patent: 5239448 (1993-08-01), Perkins et al.
patent: 5616888 (1997-04-01), McLaughlin et al.
patent: 5644327 (1997-07-01), Onyskevych et al.
patent: 6323439 (2001-11-01), Kambe et al.

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