Wiring board, semiconductor device and display module

Details Wiring board, semiconductor device and display module Wiring board, semiconductor device and display module

2007-07-31

2007-07-31

Zarroli, Michael C. (Department: 2839)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S250000, C349S150000, C361S749000, C257S668000

Reexamination Certificate

active

11441678

ABSTRACT:
A wiring board includes: a flexible insulating base1; a plurality of conductive wirings2arranged on the flexible insulating base1; protruding electrodes3provided respectively at an end portion of the same side of each of the conductive wirings; external terminals4, 5formed respectively at the other end portions of each of the conductive wirings; metal plating layers applied on the conductive wirings, the protruding electrodes and the external terminals; and solder resist layers7formed respectively by coating the conductive wirings in regions between the end portions at which the protruding electrodes are provided and the external terminals. In the regions where the solder resist layers are formed, no metal plating layers are formed on the conductive wirings, and the surfaces of the conductive wirings to be contacted with the flexible insulating base are rougher than the surfaces not to be contacted with the flexible insulating base. Even when a film base is thin, bending stress applied to the conductive wirings is relieved sufficiently, and thus breaks in the wirings are suppressed.

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