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Substrate With Crystallized Glass-Ceramic Backbone

IP.com Disclosure Number: IPCOM000037744D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Herron, LW: AUTHOR [+3]

Abstract

A crystallized ceramic (glass ceramic, alumina, etc.) plate with appropriate size, thickness, thermal coefficient of expansion (TCE) and containing metallized via holes would serve as a "backbone" onto which normally processed ceramic metallized green-sheets would be laminated (on either side of the backbone). The laminate would then be sintered free standing or with uniaxial sintering such that the backbone would control distortion, camber and shrinkage in the substrate. In addition, appropriate modification of backbone composition to yield a higher TCE than the sintered green-sheets on either side of the backbone could improve the strength of the substrate. Appropriate thicknesses for the backbone and green-sheet layers could be used to meet required specifications for distortion, camber, shrinkage, and strength.

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Substrate With Crystallized Glass-Ceramic Backbone

A crystallized ceramic (glass ceramic, alumina, etc.) plate with appropriate size, thickness, thermal coefficient of expansion (TCE) and containing metallized via holes would serve as a "backbone" onto which normally processed ceramic metallized green-sheets would be laminated (on either side of the backbone). The laminate would then be sintered free standing or with uniaxial sintering such that the backbone would control distortion, camber and shrinkage in the substrate. In addition, appropriate modification of backbone composition to yield a higher TCE than the sintered green-sheets on either side of the backbone could improve the strength of the substrate. Appropriate thicknesses for the backbone and green-sheet layers could be used to meet required specifications for distortion, camber, shrinkage, and strength.

Disclosed anonymously.

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