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AssigneeRockwell International Corporation
InventorsPaul R. Newman, Leslie F. Warren, Jr., Patricia H. Cunningham
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A conductive or semiconductive pattern of a metal sulfide or selenide such as copper, cadmium, cobalt or nickel sulfide, is provided on a substrate. The pattern may have a resistivity in the range of 1 to 10.sup.6 ohms per square. It is formed by coating the surface with a solution containing a salt of one of the metals which is capable of being converted to a divalent metal compound, a sulfur group donor such as thiourea, and a solvent such as methanol or water. The solution is dried, and then selected portions of the coated surface are irradiated with a laser beam. This thermally converts the irradiated metal salt into a metal sulfide. The unreacted solution is then washed from the substrate to leave a conductive pattern. The desired conductivity of the pattern can be obtained by selecting the proper metal salt, concentration of salt in the solution, and the energy of the radiation.
A method of producing an electrically conductive or semiconductive pattern on a substrate, which comprises:
A method of producing an electrically conductive pattern on a substrate, comprising:
A method of generating an electrically conductive pattern on a substrate comprising the steps of:
Dependencies are inferred from the claim text.