Patent ID: 6480094
Filing Date: 2002-11-12
Classification: H01C

Abstract:
A surface mountable electrical device, comprising:a laminate body having top and bottom faces and opposite first and second side faces transverse to and interconnecting said top and bottom faces, said laminate body including a plurality of stacked PTC sheets which have a positive thermal coefficient characteristic, and a metal foil component sandwiched between each two adjacent ones of said PTC sheets and consisting of two overlapping first metal foil sheets of the same metal, each of said first metal foil sheets having one side face that is surface treated and that is attached securely to a respective one of said PTC sheets, and an opposite side face that is not surface treated and that is in face-to-face contact with the other one of said first metal foil sheets, said first metal foil sheets having contact ends that extend to and that are exposed from said first side face, said laminate body further including a conductive first electrode layer formed on said top face, a conductive second electrode layer formed on said top face and spaced apart from said first electrode layer, and a conductive third electrode layer formed on said bottom face, said two adjacent ones of said PTC sheets having contact faces that have first inlaid portions respectively inlaid with said first metal foil sheets, and that further have non-inlaid portions bonded to each other; and at least a conductive first transverse layer formed on said first side face and interconnecting said first and third electrode layers and said contact ends of said first metal foil sheets.