David M Press

US Patent:

56958285, Dec 9, 1997

Filed:

Nov 21, 1996

Appl. No.:

8/754450

Inventors:

Syamal K. Ghosh - Rochester NY
Gregory S. Jarrold - Henrietta NY
Dilip K. Chatterjee - Rochester NY
David C. Press - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

B05D 300

US Classification:

427556

Abstract:

A method for making a dielectric member with an integral, electrically conductive surface is made by molding a substrate from a zirconia alloy powder using a tape casting process. The resulting green substrate is sintered and after sintering may be cut to the final desired size and shape. Once the insulating ceramic substrate has been formed, the surface of the substrate is modified using infrared laser energy. Through the impingement of infrared laser radiation upon the surface of the ceramic substrate, an electrically conductive region is produced on the surface of the substrate. In such manner, the entire surface can be made electrically conductive or a particular pattern can be traced. As an integral part of the substrate, the surface will not delaminate from the substrate. Further, because the modified surface region and the substrate are both a zirconia, the coefficients of thermal expansion of the substrate and the modified surface region will be closely matched.

US Patent:

58892346, Mar 30, 1999

Filed:

Nov 21, 1996

Appl. No.:

8/754454

Inventors:

Syamal K. Ghosh - Rochester NY
Gregory S. Jarrold - Henrietta NY
Dilip K. Chatterjee - Rochester NY
David C. Press - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05K 103

US Classification:

174250

Abstract:

A dielectric member with an integral, electrically conductive surface is made by molding a substrate from a zirconia alloy powder using a tape casting process. The resulting green substrate is sintered and after sintering may be cut to the final desired size and shape. Once the insulating ceramic substrate has been formed, the surface of the substrate is modified using infrared laser energy. Through the impingement of infrared laser radiation upon the surface of the ceramic substrate, an electrically conductive region is produced on the surface of the substrate. In such manner, the entire surface can be made electrically conductive or a particular pattern can be traced. As an integral part of the substrate, the surface will not delaminate from the substrate. Further, because the modified surface region and the substrate are both a zirconia, the coefficients of thermal expansion of the substrate and the modified surface region will be closely matched.

Author:

David Paul Press

ISBN #:

0761401539