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Au Si Eutectic Glue Layer for Glass and Ceramic Surfaces

IP.com Disclosure Number: IPCOM000085961D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Asai, KW: AUTHOR [+3]

Abstract

The described material improves the adhesion of metals on glass and ceramic surfaces.

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This is the abbreviated version, containing approximately 100% of the total text.

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Au Si Eutectic Glue Layer for Glass and Ceramic Surfaces

The described material improves the adhesion of metals on glass and ceramic surfaces.

A method is descrihed to improve the adhesion of metals, in particular, the noble metals on glass and ceramic surfaces by using an Au-Si eutectic thin film as a bonding layer between the metal and the substrates. It has been found that by melting an Au-Si eutectic alloy (~ 31 at % Si) on a fused quartz surface that the eutectic wets the quartz surface.

The wetting of the surface indicates that the eutectic-glass interface has a low-interface energy, due to strong chemical bonds existing across the interface. Therefore, the eutectic adheres well to the glass and can be used as a glue layer for metals.

The following exemplary steps are used to fabricate the eutectic: (1) Deposit a thin Si film of about 500 angstroms thickness by chemical-vapor deposition or sputtering on a glass or ceramic surface. (2) Deposit Au and/or other noble metals over the Si, e.g., the metal layer can be very thick. (3) Anneal at or above the eutectic temperature (~ 370 degrees C for Au-Si) for a short time ~/< 10 minutes.

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