Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-07-17
2007-07-17
Arbes, Carl J. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S825000, C029S830000, C029S840000, C029S846000
Reexamination Certificate
active
11210827
ABSTRACT:
The present invention provides a printed wiring board in which there is no positional deviation between a blind via hole and a land and which enables high-density wiring design to be easily achieved. Provided is a method of manufacturing a printed wiring board in which wiring pattern forming layers are connected by a blind via hole, which includes the steps of forming a wiring pattern by etching at least metal foil laminated on a surface of an insulating layer and forming a land having a window portion in a portion where a blind via hole is to be formed; irradiating the window portion with a laser beam having a diameter larger than the diameter of the window portion but smaller than the diameter of the land, thereby making a nonthrough hole for forming the blind via hole; and forming a blind via hole by forming a plating on the nonthrough hole and the land.
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U.S. Appl. No. 11/452,321, filed Jun. 14, 2006, Hirata.
Arbes Carl J.
CMK Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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