Laser trimmable resistor coating
AssigneeNorth American Philips Corporation
InventorKarl F. Baum
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Abstract
An abrasive resistant coating is provided for laser trimmable film resistor devices by use of heat-hardenable compositions containing a prepolymer of diallyl isophthalate or diallyl phthalate, an ether alcohol solvent, a heat-curing catalyst and an inert inorganic filler.
Claims9
For use as a heat cureable coating for forming an abrasive resistance protective coating for laser trimmable resistor devices, a composition consisting essentially of a mixture of a prepolymer selected from the group consisting of a diallyl isophthalate prepolymer and a diallyl phthalate prepolymer, both prepolymers being homopolymers, an ether alcohol solvent, a catalyst selected from the group consisting of t-butyl perbenzoate and t-butyl peroctate and an inert inorganic pigment.
Dependencies are inferred from the claim text.