Browse Prior Art Database

Vibratory Conductive Paste Removal Device

IP.com Disclosure Number: IPCOM000036548D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Bleau, CD: AUTHOR [+6]

Abstract

This article describes an automatic system to remove bridging between electrical circuit patterns of conductive paste on ceramic greensheets.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
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Vibratory Conductive Paste Removal Device

This article describes an automatic system to remove bridging between electrical circuit patterns of conductive paste on ceramic greensheets.

Multi-layer ceramic substrates are composed of many layers of ceramic greensheets. These greensheets, prior to layering, undergo a screening process to deposit electrical circuit patterns of conductive paste. Some bridging of this paste occurs frequently which, if not removed, causes electrical shorting in the finished substrate product. The excess paste is currently removed manually. A coarse location X-Y stage moves the substrate to a predetermined repair location. An operator then observes the short through a microscope and removes it with a surgical scalpel. It is desirable to automate this process to eliminate human element problems on current products and to assure that a repair process is available for future products. Future products will use .002 in wide circuit lands with .002 in separation between. Current product is .004 in lands with .004 in separation. Based upon observed experience with the 4-mil product, human dexterity is such that it will not permit repair of the 2-mil product manually.

The system disclosed herein will remove this excess paste automatically. Referring to the drawing, a greensheet is loaded on X-Y stage 1 into a locating reference corner (not shown). Hold down vacuum is applied. The X-Y stage moves the sheet to a repair position previously determine...