PRINTED CIRCUIT BOARD
To provide a printed circuit board in such a structure that while a current within a rating current flows, a fuse part is satisfactorily radiated and when a current equal to or more than a melting current flows, the fuse part is more surely molten within a melting time.SOLUTION: A printed circuit bo...
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Main Authors | , , |
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Format | Patent |
Language | English Japanese |
Published |
20.01.2023
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a printed circuit board in such a structure that while a current within a rating current flows, a fuse part is satisfactorily radiated and when a current equal to or more than a melting current flows, the fuse part is more surely molten within a melting time.SOLUTION: A printed circuit board 100 comprises: a flexible film-like base substrate 10; a conductor pattern 20 formed on one principal surface 10a of the base substrate 10; a cover film 71 covering the one principal surface 10a of the base substrate 10; and a lid member 61 covering a surface of the cover film 71 at an opposite side of a base substrate side (one surface 71a in this embodiment). A part of the conductor pattern 20 in an extension direction is a fuse part 31, the cover film 71 has a film opening 73 which is an opening corresponding to at least a portion of the fuse part 31, and the lid member 61 covers the film opening 73.SELECTED DRAWING: Figure 2
【課題】定格電流以内の電流が流れている間はヒューズ部が良好に放熱し、溶断電流以上の電流が流れた際には溶断時間以内にヒューズ部がより確実に溶断する構造のプリント基板を提供する。【解決手段】プリント基板100は、可撓性のフィルム状のベース基材10と、ベース基材10の一方の主面10aに形成されている導体パターン20と、ベース基材10の一方の主面10aを覆っているカバーフィルム71と、カバーフィルム71におけるベース基材側とは反対側の面(本実施形態の場合、一方の面71a)を覆っている蓋部材61と、を備えており、導体パターン20の延在方向における一部分は、ヒューズ部31であり、カバーフィルム71は、ヒューズ部31の少なくとも一部分と対応する開口部であるフィルム開口部73を有し、蓋部材61がフィルム開口部73を覆っている。【選択図】図2 |
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Bibliography: | Application Number: JP20210112649 |