Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Reexamination Certificate
2007-10-16
2007-10-16
McNeil, Jennifer (Department: 1775)
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
C428S675000, C428S901000
Reexamination Certificate
active
10516576
ABSTRACT:
The present invention relates to a flexible printed circuit board which has extremely high adhesion performance and on which very fine circuit patterns can be formed by etching, and to a method for producing the same. In the present invention, in the flexible printed circuit board wherein a copper thin film made of copper or an alloy containing primarily copper is directly formed on at least one side of a plastic film substrate, and copper is formed further on the copper thin film by the electrolytic plating method, the above-mentioned copper thin film has a two-layer structure in which a layer including at least a crystalline structure is formed on the surface side thereof, and the X-ray relative intensity ratio between crystal lattice plane indices (200)/(111) in the above-mentioned crystalline structure is 0.1 or less.
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Fukuoka Mitsuhiro
Hiranaka Kouichi
Nakagami Ryuichi
Yamashita Motohiro
Akin Gump Strauss Hauer & Feld & LLP
Matsushita Electric - Industrial Co., Ltd.
McNeil Jennifer
Speer Timothy M.
LandOfFree
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