Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuichiro Murata0
Date of Patent
October 16, 2007
Patent Application Number
10685605
Date Filed
October 16, 2003
Patent Primary Examiner
Patent abstract
On the surface of a back board outermost-layer signal lines have different lengths. A difference in lengths of connector lines connected to the outermost-layer signal lines makes the total signal line lengths substantially equal. A digital signal generated in the circuit of a daughter board reaches a through hole through an internal-layer signal line traced within the internal layer of the daughter board, and is further transmitted to an internal-layer signal line of the back board through the a connector line, the an outermost-layer signal line, and a through hole. The digital signal is further transmitted to another internal-layer signal line via another through hole, another connector line, and another through hole.
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