Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tadashi Tojyo0
Toshiaki Takenaka0
Yoshihiro Kawakita0
Date of Patent
October 16, 2007
0Patent Application Number
105351580
Date Filed
November 30, 2004
0Patent Primary Examiner
Patent abstract
A pre-preg sheet includes a substrate and a resin impregnated in the substrate. A first metal foil is placed on the pre-preg sheet to provide a laminated body. The laminated body is put in a heating device having a temperature maintained at a temperature close to a softening temperature of the resin. The laminated body is compressed at the temperature at a predetermined pressure. The first metal foil is bonded to the pre-preg sheet of the laminated body and hardening the resin, thus providing a circuit board. This method provides a stable resistance of a conductive paste filing a through-hole in the pre-preg sheet to be compressed at a small rate.
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