International Business Machines Corporation

Thomas J VanDuynhoven

Laertis Economikos

Robert Hannon

Richard Philip Surprenant

John R Lankard, Jr

Gerald H Leino

Chris T Kapogiannis

A method for serializing ceramic substrates in which a laser is used to remove unfired paste material from an unfired ceramic substrate. The paste material is removed by exposing the unwanted paste material to laser radiation in a programmed sequence of x and y coordinate moves. The laser radiation removes the unwanted paste material, leaving the identifying characters intact. The identifying characters can be used for part identification and traceability.

Pattern formation by removal of paste material

Temperature gradients between a ceramic substrate of high thermal conductivity and the braze materials used to attach a metallic device such as a cap are reduced by using an embedded internal heat source in the substrate to minimize the thermal gradient, thereby minimizing the stresses that can result in substrate cracking when a cap is brazed onto the substrate.

High thermal conductivity substrate and the method of brazing a cap

Growing community of inventors

Monroe, NY, United States of America

Thomas J VanDuynhoven