Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-10-16
2007-10-16
Chang, Richard (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S846000, C029S847000, C174S254000, C174S262000, C427S097100, C427S097700
Reexamination Certificate
active
11253973
ABSTRACT:
The present invention is related to a method of fabricating a rigid-flexible printed circuit board. Specifically, this invention relates to a method of fabricating a rigid-flexible printed circuit board, in which an internal circuit pattern exposed for use in an external pad and a mounting pad is protected from external environments using a resist cover by window etching the base copper foil of a flexible region upon formation of an external circuit pattern as opposed to using a resist cover. Thus the number of fabrication processes and the fabrication costs are decreased and the increase in defect rates due to contamination is prevented, resulting in maximized reliability.
REFERENCES:
patent: 5095628 (1992-03-01), McKenney et al.
patent: 5206463 (1993-04-01), DeMaso et al.
patent: 6745463 (2004-06-01), Chou
patent: 2003-101167 (2003-04-01), None
An Dong Gi
Chai Jung Hun
Hwang Jung Wook
Kim Kwang Yune
Lee Yang Je
Chang Richard
Darby & Darby P.C.
Samsung Electro-Mechanics Co. Ltd.
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