Browse Prior Art Database

Method of Healing Glass Coatings on Substrates

IP.com Disclosure Number: IPCOM000094449D
Original Publication Date: 1965-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Grebe, KR: AUTHOR

Abstract

In the coating of glass on metallic or other conducting surfaces, the glass coating often has pin holes or other larger imperfections which tend to degrade the properties of the glass coating.

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Method of Healing Glass Coatings on Substrates

In the coating of glass on metallic or other conducting surfaces, the glass coating often has pin holes or other larger imperfections which tend to degrade the properties of the glass coating.

The holes, in accordance with this method, can be healed by immersing the coated object into an electrophoretic bath. The bath consists of a suspension of finely divided insulation particles in a nonconductive carrier fluid. By applying a DC voltage potential between the insulating surface and the conducting surface, the suspended particles are electrostatically attracted to any area in which the conducting surface of the work is exposed thus filling these areas with insulating particles. Loose particles are closely packed and by firing, the particles fuse to each other and to the insulating surface to produce a seal which compares favorably to the original glass coating.

This method can be utilized in the encapsulation of semiconductors and healing insulation defects on strip lines. The use of this method increases component yield with consequent monetary savings.

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