Circuit board, electronic circuit chip-mounted circuit board and

Details Circuit board, electronic circuit chip-mounted circuit board and Circuit board, electronic circuit chip-mounted circuit board and

1993-03-11

1994-12-06

Picard, Leo P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

174252, 174255, 361711, 361712, 361714, 361716, 361684, 361720, 361792, 361794, 361795, 361760, 361780, 434 68, 434485, H05K 720, H05K 111

Patent

active

053716531

ABSTRACT:
A circuit board includes a circuit-conductor layer, a ground layer and a power source layer superposed in a multilayer form through dielectric layers therebetween, A heat conduction through inside of the circuit board is enhanced so that circuit chips mounted on the circuit board can be cooled down to a level capable of operating normally, The circuit board can be formed to be compact, In order to enhance the heat transfer in the circuit board, at least one of the ground layer and power source layer is formed in a multilayer manner, It is preferable to form these layers at a thickness larger than that of the circuit-conductor layer, Further, preferably, the pin of the chip mounted on the board and at least one of the ground layer and power supply layer are connected to each other in such a manner as to enhance the heat conduction.

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IBM Technical Disclosure Bulletin vol. 19, No. 11 Apr. 1977 D. Balderes, J. R. Lynch, and R. A. Yacavonis.

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