Thin type thermal fuse and manufacturing method thereof

Details Thin type thermal fuse and manufacturing method thereof Thin type thermal fuse and manufacturing method thereof

1999-02-26

2000-03-21

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337231, 337296, 337404, 29623, H01H 85046, H01H 85044, H01H 6902

Patent

active

060407549

ABSTRACT:
A thin type thermal fuse is structured by a resin base film, a pair of belt-shaped lead conductors, a low melting-point fusible alloy piece, flux and a resin cover film. Tip portions of the pair of belt-shaped lead conductors is fixed on the resin base film. The low melting-point fusible alloy piece is coupled between the tip end portions of the belt-shaped lead conductors. The flux applied on the low melting-point fusible alloy piece. The resin cover film which is disposed on a one surface of the resin base film so that a space between said films at peripheries of both the resin cover film and the resin base film is sealed and a space between the resin cover film and the belt-shaped lead conductors is sealed. In the thin type thermal fuse, a relation of (V/L).sup.1/2 /d.ltoreq.1.8 is satisfied, where a distance between the tip portions of the belt-shaped lead conductors is set to be L, a volume of the low melting-point fusible alloy piece is set to be V and a distance between the front surface of the resin base film and an inner surface of the resin cover film is set to be d.

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