Method of making PTC devices

Details Method of making PTC devices Method of making PTC devices

1987-02-26

1988-09-13

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29843, 29612, 338 22R, 219 912, H01C 1728

Patent

active

047699019

ABSTRACT:
A process for producing a PTC device comprising the steps of forming a laminate comprising a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, superposing, on the surface of each of the electrode plates of the laminate, a lead plate to be electrically connected to the electrode, joining the electrode plate and the lead plate by spot welding, and during or prior to the spot welding process, forming at least one through hole penetrating through the electrode plate and the lead plate in the center of a weld. This process can minimize the heat damage of the PTC composition and the resulting PTC device has a low contact resistance.

REFERENCES:
patent: 3748439 (1973-07-01), Ting et al.
patent: 4480166 (1984-10-01), Leech

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