Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-12-06
2005-12-06
Arbes, Carl J. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S825000, C029S830000, C029S846000, C156S233000, C156S247000
Reexamination Certificate
active
06971167
ABSTRACT:
A multilayered circuit board and a method of forming the multilayered circuit board are provided. In a first circuit forming process, a first circuit is formed on an insulating board with a conductor; in a circuit embedding process, the first circuit is embedded in the insulating board so as to have a predetermined surface flatness and a predetermined parallelism; in a masking process, a pilot hole for a via hole is masked at a part of a surface of the circuit; in an insulating layer forming process P5p, an insulating material is applied as a layer to the surface except that portion thereof covered by the mask; in an insulating material layer flattening process, the surface of the insulating material layer is flattened so as to have the predetermined surface flatness and the predetermined parallelism; and in a pilot hole forming process, the mask is removed.
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Nishikawa Kazuhiro
Otani Hiroyuki
Tsukahara Norihito
Arbes Carl J.
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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