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Controlled Filtering System for Chemical Solutions

IP.com Disclosure Number: IPCOM000088392D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Carpenter, RW: AUTHOR [+2]

Abstract

A conventional particle counter (not shown) is used to determine the effectiveness of a filtering system associated with a solution in which the particles are present.

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Controlled Filtering System for Chemical Solutions

A conventional particle counter (not shown) is used to determine the effectiveness of a filtering system associated with a solution in which the particles are present.

In one particular application, solution S is a chemical plating bath used in a chemical additive plating process for plating printed-circuit boards and the like. Solution S is recirculated in tank T via the filter system, which includes pump P and particle filter(s) F. Samples of the solution are periodically analyzed to determine the size of the undesirable nodule particles N, which form as a result of the chemical action of the bath. If the nodules N grow to a predetermined size, the filter(s) F are replaced. As a result, the plating reliability of the bath with respect to the boards B is enhanced.

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