Coating processes – Electrical product produced – Condenser or capacitor
Patent
1983-05-13
1985-04-16
Smith, John D.
Coating processes
Electrical product produced
Condenser or capacitor
427 80, 427 88, 427 96, 4273762, 427380, H05K 312
Patent
active
045116016
ABSTRACT:
A method of providing a copper metallization on a dielectric or semiconductive body, and a dielectric or semiconductive body having a metallization consisting essentially of copper. According to the method, a mixture of copper oxide powder and 0 to 15 weight percent reduction-resistant glass frit is dispersed in an organic vehicle and a solvent to produce a paste. The paste is applied to the body to provide a coating thereon. The coating is dried to remove the solvent, and then the coated body is fired in an oxidizing atmosphere at a temperature below the melting temperature of the glass frit to remove the organic vehicle. Finally, the coated body is fired a second time in an atmosphere which is reducing to the copper oxide but substantially nonreducing to the glass frit. The second firing is at a temperature from 700.degree. to 1050.degree. C. for from 120 to 15 minutes to convert the copper oxide to copper metal. The metallized body may comprise a reduction-resistant dielectric body and a metallization consisting essentially of copper, with no glass frit.
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Akse James R.
Long Stanley A.
North American Philips Corporation
Schechter Marc D.
Smith John D.
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