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Browse Prior Art Database

Vehicle for Silver Palladium Conductive Paste

IP.com Disclosure Number: IPCOM000090107D
Original Publication Date: 1969-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Milkovich, SA: AUTHOR [+3]

Abstract

To improve the flow characteristics of screening media, specific surface active agents can be used. For example, N acyl sarcosine surfactants are particularly advantageous in depositing screened conductor lines which have a high height and width ratio and which require very close lateral tolerances. Specifically, the use of oleoyl sarcosine in the range of 1% to 10% in a conductor vehicle, such as described in U.S. Patent 3,374,110, provides exceptional fine line printing. Furthermore, after firing, the edges of the fired lines are denser and more uniform. This improved uniformity provides better adhesion, conductance, and other advantages. A typical formulation of this type is: Paste % By Weight Solids 79.00 Vehicle 19.

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Vehicle for Silver Palladium Conductive Paste

To improve the flow characteristics of screening media, specific surface active agents can be used. For example, N acyl sarcosine surfactants are particularly advantageous in depositing screened conductor lines which have a high height and width ratio and which require very close lateral tolerances. Specifically, the use of oleoyl sarcosine in the range of 1% to 10% in a conductor vehicle, such as described in U.S. Patent 3,374,110, provides exceptional fine line printing. Furthermore, after firing, the edges of the fired lines are denser and more uniform. This improved uniformity provides better adhesion, conductance, and other advantages. A typical formulation of this type is: Paste % By Weight Solids 79.00 Vehicle 19.95 Oleoyl Sarcosine 1.05 Vehicle Diethyleneglycolmonobutyl ether 77 Ethyl Cellulose 16 2-Furoic Acid 7.

The solids are composed of about 75-85 parts by weight of silver powder and, correspondingly, about 25-15 parts by weight of palladium powder, and 1-10 parts by weight, preferably 2-5 parts, of a vitreous frit. Compounding follows the method defined in the patent.

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