Printed-circuit board

Details Printed-circuit board Printed-circuit board

H - Electricity

05

K

H05K 1/03 (2006.01) H01P 3/08 (2006.01) H05K 1/02 (2006.01) H05K 1/14 (2006.01) H05K 1/00 (2006.01) H05K 3/46 (2006.01)

Patent

CA 2060840

Abstract of the Disclosure: Disclosed is an improved printed-circuit board comprising upper and lower dielectric boards (10) and (11) each having a signal conductor pattern (12) or (13) on one side, and a porous dielectric board (15) sandwiched between the upper and lower dielectric boards (10) and (11). Preferably porous boards (15) have through holes regularly arranged therein. The apparent dielectric constant of the porous dielectric board (15) is such a reduced value that the upper limit of signal frequency is expanded without recourse of reducing the signal conductor width. Advantageously printed-circuit boards according to the present invention can be used as data bus in transferring data at a high-speed in a computer system.

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