Metal working – Method of mechanical manufacture – Electrical device making
Patent
1996-05-29
1999-08-24
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29877, 338 22R, 338328, H01C 702, H01R 4302
Patent
active
059409584
ABSTRACT:
Electrical devices comprising a PTC element comprised of a polymer having conductive particles dispersed therein. The PTC element is coated with a conductive layer and has electrodes with a plurality of voids affixed to opposing surfaces. The devices are made by dispersing conductive particles into a polymer to form a polymer PTC composition. The polymer PTC composition is melt-shaped to form a laminar shaped PTC element. First and second opposing surfaces of the PTC element are coated with a conductive layer. The electrodes, characterized by a plurality of voids, are brought into contact with the coated surfaces of the PTC element, and heated while applying pressure to form a laminate. The laminate is then further shaped into a plurality of PTC electrical circuit protection devices.
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Hall Tom J.
Hoss Michael J.
Randle Donna L.
Shaw, Jr. Philip C.
Weber Michael J.
Echols P. W.
Littlefuse, Inc.
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