Browse Prior Art Database

Conductive Metalizing Composition

IP.com Disclosure Number: IPCOM000097377D
Original Publication Date: 1962-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Camuzat, M: AUTHOR [+2]

Abstract

The presence of a small percentage of a lithium salt in a conductive metalizing composition composed primarily of finely divided precious metals or inorganic precious metal compounds and low softening powdered glass improves the adhesion of the composition to a ceramic substrate. Among the suitable lithium salts are lithium carbonate, lithium chloride and lithium fluoride.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Conductive Metalizing Composition

The presence of a small percentage of a lithium salt in a conductive metalizing composition composed primarily of finely divided precious metals or inorganic precious metal compounds and low softening powdered glass improves the adhesion of the composition to a ceramic substrate. Among the suitable lithium salts are lithium carbonate, lithium chloride and lithium fluoride.

Conductive layers are fabricated by first mixing the glass binder, the metal, metals or inorganic compounds, and the lithium salt or salts in the particular proportions desired with a suitable volatile liquid vehicle. The uniform mixture is then applied to the ceramic substrate by silk screening, painting by brush or spraying procedures. The applied layer is fired in air for fifteen minutes to one hour at a temperature above the softening point of the glass in the composition. The layer is then cooled to room temperature. The firing removes the volatile materials and fuses the glass powder and lithium salt into a solid layer with the metal or metal compounds dispersed through it.

A typical composition which is applied by silk screening techniques is in weight per cent: Platinum black 47%

Powdered glass 3.7%

(softening temperature

< 950 degrees C.)

Lithium chloride 2.3%

Pine oil 47% 100%

1