Flexible printed circuit board

Details Flexible printed circuit board Flexible printed circuit board

2006-10-10

2006-10-10

Cuneo, Kamand (Department: 2841)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S255000, C174S258000

Reexamination Certificate

active

07119285

ABSTRACT:
A flexible printed circuit board (FPCB) which prevents a short circuit due to a crack in a bending portion is provided. The FPCB includes an end portion, a bending portion extended from the end portion, and a circuit portion extended from the bending portion. The improved FPCB includes a base film which is flexible and comprises a first via-hole formed adjacent to the end portion and the bending portion and a second via-hole formed adjacent to the bending portion and the circuit portion, a first conductive layer formed on an outer surface of at least the end portion and the bending portion, a cover layer formed on the first conductive layer, a second conductive layer which is formed on an inner surface of the end portion and is electrically connected to the first conductive layer through the first via-hole, and a third conductive layer which is formed on an inner surface of the extension circuit portion and is electrically connected to the first conductive layer through the second via-hole.

REFERENCES:
patent: 5408052 (1995-04-01), Inaba et al.
patent: 5471438 (1995-11-01), Kobayashi et al.
patent: 5742480 (1998-04-01), Sawada et al.
patent: 6041495 (2000-03-01), Yoon et al.

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