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PHOTOPATTERNED INK INLET SEAL WITH OPTIONAL FILTRATION CAPABILITY

IP.com Disclosure Number: IPCOM000027452D
Original Publication Date: 1997-Feb-28
Included in the Prior Art Database: 2004-Apr-08
Document File: 4 page(s) / 222K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is the use of a photopatternable adhesive, such as Parad@, to form an ink-tight seal between thermal ink jet die modules and the ink delivery system. An ink fitration capability can be optionally patterned into the material. The photopatternable dry film adhesive can withstand chemical attack by a wide variety of thermal ink jets.

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XEROX DISCLOSURE JOURNAL

PHOTOPATTERNED INK INLET SEAL WITH OPTIONAL FILTRATION CAPABILITY Int. C1. B41j 29/38 Gary A. Kneezel
Ram Narang
Michael P. Duffy
David J. Collins
Peter J. John
Almon P. Fisher
Allan F. Camp

Proposed Classification
U. S. C1.347/005

- 70

- 72

FIG. 7

17 XEROX DISCLOSURE JOURNAL - Vol. 22, No. 1 JanuaqfFebruary 1997

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PHOTOPATTERNED INK INLET SEAL WITH OPTIONAL FILTRATION CAPABILITY (CONT'D)

Proposed is the use of a photopatternable adhesive, such as Parad@, to form an ink-tight seal between thermal ink jet die modules and the ink delivery system. An ink fitration capability can be optionally patterned into the material. The photopatternable dry film adhesive can withstand chemical attack by a wide variety of thermal ink jets.

The thermal ink jet die assembly is composed of a heater die containing bubble-nucleating resistive heaters and a channel die containing fluid pathways including ink inlet holes. The heater die extends beyond the channel die so that electrical interconnection can be made by wire bonding. Ink is delivered to the die from an ink cartridge or an off-board ink
supply through the ink inlet holes in the channel plate. An ink-tight seal must be made between the channel plate and the ink delivery system.

In the embodiment shown in Figure 1, seal 10 consists of a rectangular ring 10 surrounding inlet holes 12. For the printhead shown in Figure 2, an ink inlet sealing member 14 is formed from a mylar film coated on both sides with a phenolic nitrile adhesive. The film extends beyond the die, and has the further function of forming a wall to simplify injection molding of the ink cartridge. Other ink inlet seal materials include silicone and contact cement. Patterning of the seal may be achieved by screen printing, syringe deposition of liquid state materials, or by punching a frlm material such as phenolic nitrile coated mylar. Placement of the seal is critical relative to the ink inlet holes because the geometries near the ink inlets on the channel die are small.

It is proposed to fabricate the ink inlet seal by photopatterning an adhesive film such as Parad@, an epoxy film material made by E. I. duPont de Nemours & Co. Variants

18 XEROX DISCLOSURE JOURNAL - Vol. 22, No. 1 JanuaryRebruary 1997

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PHOTOPATTERNED INK INLET SEAL WITH OPTIONAL FILTRATION CAPABILITY

(CONT'D)

described below include the seal film material not extending beyond the channel plate (Figure l), film material extending beyond the channel plate, (Figure 2), and film material patterned over the ink inlet holes to form a fiter, and a sandwich configuration with a thinly etched stainless steel layer between two photopatterned adhesive film layers.

For the configuration of Figure 1, a sheet of photopatternable adhesive (hereafter exemplified by Parad@) of approximately 0.001'' to 0.010'' in thickness i...