The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2002
Filed:
Jun. 29, 2000
Hironori Matsushima, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In the present semiconductor device, signal lines of the first signal layer are led to the lower multi-layer portion via through holes selected under certain conditions so that the crosstalk noise does not become a problem even when the second signal layer is superposed on the first signal layer without providing a plane layer therebetween. In addition, a ground plane is provided in the region of the first signal layer lacking signal lines so that the second signal layer is sandwiched by the planes to form a strip structure even without the provision of a separate plane layer between the first signal layer and the second signal layer. Thus, the number of layers required for the multi-layer substrate can be reduced by eliminating this one unnecessary plane layer.