RESIN COMPOSITION FOR FORMING PROTECTIVE FILM, DRY FILM SOLDER RESIST, COVERLAY FILM, FLEXIBLE PRINTED WIRING BOARD AND MANUFACTURING METHOD OF FLEXIBLE PRINTED WIRING BOARD

PROBLEM TO BE SOLVED: To provide a resin composition for forming a protective film which can ensure a required flexibility when used in a printed wiring board and can form a protective film having a high heat resistance in a required region.SOLUTION: The resin composition for forming a protective fi...

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Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a resin composition for forming a protective film which can ensure a required flexibility when used in a printed wiring board and can form a protective film having a high heat resistance in a required region.SOLUTION: The resin composition for forming a protective film that forms the protective film of a flexible printed wiring board 1 is constituted to contain a first curable resin component 5a and a second curable resin component 5b having different hardening conditions or hardening characteristics. A protective film having a required deformability is formed by principally curing the first curable resin component, and a protective film having a required heat resistance is formed by curing the first curable resin component and the second curable resin component.