Multilayer printed circuit board

Details Multilayer printed circuit board Multilayer printed circuit board

1985-07-22

1986-10-07

Grimley, Arthur T.

Electricity: electrical systems and devices

Miscellaneous

174 685, 361397, 361409, H05K 114

Patent

active

046162925

ABSTRACT:
In a multilayer printed circuit board including a signal layer, a power supply layer, and through-holes, the shape of each of clearances formed on a power supply layer for the purpose of attaining insulation from through-holes is nearly a quadrangle having four circular corners. Thereby, the area of the power supply layer left between adjacent clearances is increased to suppress increase in electrical resistance at that portion.

REFERENCES:
patent: 2990310 (1961-06-01), Chan
patent: 4562513 (1985-12-01), Arnold et al.

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