# US 2021/0243879 A1 · Printed-circuit board

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- Number: US 2021/0243879 A1
- Document ID: US20210243879A1
- Status: Published application
- Kind: A1
- Application number: 17/148,879
- Filed: 2021-01-14
- Published: 2021-08-05
- Earliest claimed: 2020-02-05
- Assignees: Nippon Mektron, Ltd.
- Applicants: Nippon Mektron, Ltd.
- Inventors: Kenji KIYA; Tomoki KANAYAMA
- Web page: https://patentgrep.com/patent/US20210243879A1

## CPC

- H05K 1/0201: {Thermal arrangements, e.g. for cooling, heating or preventing overheating}
- H05K 1/0293: {Individual printed conductors which are adapted for modification, e.g. fusable or breakable conductors, printed switches}
- H05K 1/032: {consisting of one material}
- H05K 1/16: incorporating printed electric components, e.g. printed resistors, capacitors or inductors
- H05K 2201/0129: Thermoplastic polymer, e.g. auto-adhesive layer; Shaping of thermoplastic polymer
- H05K 2201/062: Means for thermal insulation, e.g. for protection of parts
- H05K 2201/09063: Holes or slots in insulating substrate not used for electrical connections
- H05K 2201/09263: Meander
- H05K 2201/10181: Fuse
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A printed-circuit board includes: a film-shaped thermoplastic base member having plasticity; a pattern fuse formed from a metal foil layer provided on a principal surface of the base member; a cover member covering at least part of the pattern fuse from an opposite side of the base member; and a first heat-resistant protection film provided on a region overlapping with at least part of the pattern fuse and covering the pattern fuse from a cover member side.

## Claims

### Claim 1

A printed-circuit board comprising:
a film-shaped thermoplastic base member having plasticity;
a pattern fuse formed from a metal foil layer provided on a principal surface of the base member;
a cover member covering at least part of the pattern fuse from an opposite side of the base member; and
a first heat-resistant protection film provided on a region overlapping with at least part of the pattern fuse and covering the pattern fuse from a cover member side.

### Claim 2 (depends on 1)

The printed-circuit board according to claim 1, wherein
the cover member contains thermoplastic resin.

### Claim 3 (depends on 1)

The printed-circuit board according to claim 1, wherein
the cover member and the first heat-resistant protection film are bonded to each other with a thermoplastic adhesive for the first heat-resistant protection film.

### Claim 4 (depends on 3)

The printed-circuit board according to claim 3, wherein
the adhesive for the first heat-resistant protection film has an opening which opens at a region overlapping with part of the pattern fuse.

### Claim 5 (depends on 1)

The printed-circuit board according to claim 1, further comprising:
a second heat-resistant protection film provided on a region overlapping with at least part of the pattern fuse and covering the pattern fuse from a base member side.

### Claim 6 (depends on 1)

The printed-circuit board according to claim 1, wherein
the base member contains thermoplastic resin.

### Claim 7 (depends on 5)

The printed-circuit board according to claim 5, wherein
the base member and the second heat-resistant protection film are bonded to each other with a thermoplastic adhesive for the second heat-resistant protection film.

### Claim 8 (depends on 7)

The printed-circuit board according to claim 7, wherein
the adhesive for the second heat-resistant protection film has an opening which opens at a region overlapping with part of the pattern fuse.

### Claim 9 (depends on 1)

The printed-circuit board according to claim 1, wherein
materials of the base member and the cover member are an identical type of material.