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MONOLITHIC INK JET APERTURE DEVICE

IP.com Disclosure Number: IPCOM000024987D
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 42K

Publishing Venue

Xerox Disclosure Journal

Abstract

The formation of apertures in the aperture plate of an ink jet printing machine is critical. One technique employs electroforming the aperture plate using metal, for example, chromium on a glass mandrel. The electroform is left on the mandrel. A thick photoresist, i.e, several coats, is placed on top of the electroform. The photoresist is exposed from the backside through the aperture holes. This produces excellent alignment. The shape of the exposed photoresist plug can be adjusted by using the appropriate light pattern. The photoresist is developed, and additional nickel added, as required, by electroplating. After the desired plate thickness is achieved, it is removed from the mandrel, inasmuch as nickel will not stick to chromium, and the photoresist plug is removed through use of an organic solvent.

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LEROX DISCLOSURE JOURNAL

MONOLITHIC INK JET APERTURE DEVICE Proposed William G. Herbert, Jr. Classification

U.S. Cl. 178/6.6 Int. C1. H041 21/00

The formation of apertures in the aperture plate of an ink jet printing machine is critical. One technique employs electroforming the aperture plate using metal, for example, chromium on a glass mandrel. The electroform is left on the mandrel. A thick photoresist, i.e, several coats, is placed on top of the electroform. The photoresist is exposed from the backside through the aperture holes. This produces excellent alignment. The shape of the exposed photoresist plug can be adjusted by using the appropriate light pattern. The photoresist is developed, and additional nickel added, as required, by electroplating. After the desired plate thickness is achieved, it is removed from the mandrel, inasmuch as nickel will not stick to chromium, and the photoresist plug is removed through use of an organic solvent.

Volume 8 Number 2 March/April 1983

e

95

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  XEROX DISCLOSURE JOURNAL Volume 8 Number 2 March/April 1983

96

[This page contains 1 picture or other non-text object]