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Ink Jet Nozzle Fabrication

IP.com Disclosure Number: IPCOM000084881D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Olsen, CE: AUTHOR

Abstract

Ink jet nozzles may be formed by the exposure and etching of photosensitive glass ceramic. In order to produce a plurality of small nozzles having low-aspect ratios (depth Divide diameter), the plate in which the nozzles are formed must be extremely thin and is therefore quite fragile. A thick nozzle requires high pressure and has a small print window (i.e., a combination of operating conditions in which satellite-free drop formation occurs.

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Ink Jet Nozzle Fabrication

Ink jet nozzles may be formed by the exposure and etching of photosensitive glass ceramic. In order to produce a plurality of small nozzles having low-aspect ratios (depth Divide diameter), the plate in which the nozzles are formed must be extremely thin and is therefore quite fragile. A thick nozzle requires high pressure and has a small print window (i.e., a combination of operating conditions in which satellite-free drop formation occurs.

A stronger unitary structure may be formed by the diffusion bonding of two sheets of the photosensitive glass, one sheet comprising a nozzle plate and the other a support structure.

Specifically, a thin sheet of the photosensitive glass is suitably exposed, crystallized and etched to form an array of ink jet nozzles. A thicker backing sheet is then exposed, crystallized and etched to form an array of larger diameter holes. The thin plate is aligned with, and superimposed on the backing plate, and both plates are exposed and heated so as to bond and form a single part.

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