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. 08, 2007
Filed:
Mar. 01, 2004
Akiji Shibata, Hitachi, JP;
Toyoharu Koizumi, Kitaibaraki, JP;
Tsuyoshi Ishihara, Tokai, JP;
Takashi Sato, Hitachi, JP;
Akiji Shibata, Hitachi, JP;
Toyoharu Koizumi, Kitaibaraki, JP;
Tsuyoshi Ishihara, Tokai, JP;
Takashi Sato, Hitachi, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
The amount of time required to manufacture double-sided printed circuit boards that contain conductor bridges can be reduced. A method is provided which includes the steps of forming holes which pass through an insulating board and a first conductor layer formed on a first main side of the insulating board, bonding a second conductor layer to a second main side of the insulating board having the holes, forming a third conductor layer on the whole first main side of the insulating board after bonding the second conductor layer, masking preset holes with a plating resist, plating the first conductor and holes in the insulating board, patterning the first conductor layer to form a first conductor pattern, patterning said second conductor layer to form a second conductor pattern, and removing the plating resist and the third conductor layer from an area which is covered with the plating resist.