Browse Prior Art Database

Pre Plating Treatment for Refractory Metal Areas

IP.com Disclosure Number: IPCOM000045207D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Boye, CA: AUTHOR [+2]

Abstract

This process places sintered refractory metal areas on a multilayer ceramic substrate in condition for plating operations.

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Pre Plating Treatment for Refractory Metal Areas

This process places sintered refractory metal areas on a multilayer ceramic substrate in condition for plating operations.

The screened refractory metal areas on fired multilayer ceramic substrates consist of refractory metal particles which have been sintered into a porous structure. Some of the pores are inherently filled with silicates either from the ceramic material or from the paste formulation, which have melted during the firing operation and penetrated into the porous refractory lands. Before plating, the silicates in the surface of the lands must be removed to expose as much of the refractory metal particles as possible to the plating operation.

In this process the substrates are dipped into a potassium ferricyanide solution. Then the soluble silicates in the refractory metal areas are removed by dipping the substrates into a potassium hydroxide solution. The substrates can then be processed through the normal activation treatment steps necessary for electroless metal plating.

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