PRINTED CIRCUIT BOARD
To provide a highly reliable printed circuit board that does not ignite or short-circuit and functions properly even when a current below the fusing current flows for more than the fusing time.SOLUTION: A printed circuit board 1 includes a flexible film-like thermoplastic base substrate 10, a patter...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a highly reliable printed circuit board that does not ignite or short-circuit and functions properly even when a current below the fusing current flows for more than the fusing time.SOLUTION: A printed circuit board 1 includes a flexible film-like thermoplastic base substrate 10, a pattern fuse 12 formed of a metal foil layer provided on a main surface of the base substrate 10, a cover member 13 that covers at least a part of the pattern fuse 12 from the opposite side of the base substrate 10, and a heat-resistant protective film 141 provided in an area overlapping at least a part of the pattern fuse 12 and covering the pattern fuse 12 from the side of the cover member.SELECTED DRAWING: Figure 3
【課題】溶断電流以下の電流が溶断時間以上の間流れている場合にも発火やショートすることがなく、適切に機能する信頼性の高いプリント基板を提供する。【解決手段】可撓性を有するフィルム状の熱可塑性のベース基材１０と、ベース基材１０の主面に設けられた金属箔層で形成されたパターンヒューズ１２と、パターンヒューズ１２の少なくとも一部をベース基材１０の反対の側から覆うカバー部材１３と、パターンヒューズ１２の少なくとも一部と重なる領域に設けられ、パターンヒューズ１２をカバー部材の側から覆う耐熱保護フィルム１４１と、によりプリント基板１を形成する。【選択図】図３ |
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