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Cleaning Plated-thru-holes

IP.com Disclosure Number: IPCOM000062001D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Lubert, KJ: AUTHOR [+3]

Abstract

Components can be connected to multilayer printed circuit boards by means of connectors that are inserted in thru-holes in the boards. These thru-holes are plated with copper in order to make electrical connection to the circuit lines in the circuit board.

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Cleaning Plated-thru-holes

Components can be connected to multilayer printed circuit boards by means of connectors that are inserted in thru-holes in the boards. These thru-holes are plated with copper in order to make electrical connection to the circuit lines in the circuit board.

The additive plating bath used to plate thru-holes sometimes leaves nodules of copper in the holes. These nodules can interfere with the insertion of connectors in the bo

It has been found that nodules can easily and inexpensively be removed from thru-holes by pushing a gauge-wire thru the plugged hole using a controlled force. Enough force must be applied so as to remove the nodules; however, the force must be kept at a low enough value such that the board is not damaged.

Disclosed anonymously.

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