Patent ID: 6133146
Filing Date: 2000-10-17
Classification: F42B

Abstract:
A semiconductor bridge device comprising:an electrically non-conducting substrate;an electrically-conducting material deposited on the substrate and having a temperature coefficient of electrical resistivity which is negative at a given temperature above about 20.degree. C. and below about 1400.degree. C. the material defining a bridge connecting a pair of spaced-apart pads, the bridge and the pads being so dimensioned and configured that passage therethrough of an electrical current of selected characteristics releases energy at the bridge;a pair of spaced-apart metallized lands each being of planar, plate-like configuration and one being disposed on each of the spaced-apart pads but leaving at least a portion of the bridge uncovered, each of the metallized lands comprising (i) a base layer comprised of titanium and disposed upon its associated pad, (ii) an intermediate layer comprised of titanium and tungsten and disposed on its associated base layer, and (iii) a top layer comprised of tungsten and disposed on its associated intermediate layer; andan electrical conductor connected to each of the metallized lands for passing an electrical current of the selected characteristics through the bridge.