Patent US5524784A successfully refreshed from Google Patents.
US5524784A
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Method for producing ink jet head by multiple development of photosensitive resin, ink jet head produced thereby, and ink jet apparatus with the ink jet head
Assignee: Canon Inc
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Filing: 1993-06-24
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Granted: 1996-06-11
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Expires: 2013-06-24
Abstract
Abstract A method for producing an ink jet head substrate with an ink passage communicated to an ink discharge opening comprises the steps of exposing a positive type photosensitive resin on a substrate according to the pattern of the ink passage and developing part of the resin according to the pattern of the ink passage. The remaining resin matching the pattern of the ink passage is then further exposed and developed and the resulting gap in the pattern is filled with material for forming the ink passage. The rest of the resin is then removed to form the ink passage which, because of the multiple exposing and developing steps, provides an ink jet head with an ink passage of high precision.
Inventors
- 👤 Shoji Shiba
- 👤 Isao Imamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2022; G03F7/0015
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
A method for producing an ink jet head with an ink passage communicated to an ink discharge opening, said method comprising the steps of: exposing a photosensitive resin on a substrate according to the pattern of said ink passage; developing said resin according to said pattern of said ink passage to partially remove the photosensitive resin after exposure; thereafter further exposing said resin according to said pattern of said ink passage; thereafter further developing said resin according to said pattern of said ink passage to remove the further exposed photosensitive resin; filling a gap in said pattern with material for forming a wall of said ink passage; and removing the rest of said resin to form said ink passage.
Claim 2
Independent Claim
119 words
A method for producing an ink jet head with an ink passage communicated to an ink discharge opening, said method comprising the steps of: exposing a photosensitive resin on a substrate according to the pattern of said ink passage; developing said resin according to said pattern of said ink passage to partially remove the photosensitive resin after exposure; thereafter further exposing said resin according to said pattern of said ink passage; thereafter further developing said resin according to said pattern of said ink passage to remove the further exposed photosensitive resin; filling a gap in said pattern with material for forming a wall of said ink passage; and removing the rest of said resin to form said ink passage.
Claim 3
Dependent Claim
22 words
A method for producing an ink jet head according to claim 1, wherein said photosensitive resin is a positive type photosensitive resin.
Claim 4
Dependent Claim
25 words
A method for producing an ink jet head according to claim 2, wherein said positive type photosensitive resin is a resin of the naphthoquin family.
Claim 5
Dependent Claim
24 words
A method for producing an ink jet head according to claim 2, wherein said positive type photosensitive resin is a chemical amplification type resin.
Claim 6
Dependent Claim
25 words
A method for producing an ink jet head according to claim 2, wherein said positive type photosensitive resin is a main chain decomposition type resin.
Claim 7
Dependent Claim
36 words
A method for producing an ink jet head according to claim 1 or 2, wherein not more than 20 μm in thickness of said resin is removed in each said exposing step and said developing step.
Claim 8
Dependent Claim
24 words
A method for producing an ink jet head according to claim 1 or 2, wherein said developing steps are carried out by using solvent.
Claim 9
Dependent Claim
26 words
A method for producing an ink jet head according to claim 1 or 2, wherein said filling step is carried out by a transfer molding method.
Claim 10
Dependent Claim
24 words
A method for producing an ink jet head according to claim 1 or 2, wherein said removing step is carried out by using solvent.
Claim 11
Dependent Claim
36 words
A method for producing an ink jet head according to claim 1, wherein curing of said material for forming said wall of said ink passage is carried out between said filling step and said removing step.
Claim 12
Dependent Claim
20 words
A method for producing an ink jet head according to claim 10, wherein said curing is carried out by irradiation.
Claim 13
Dependent Claim
32 words
A method for producing an ink jet head according to claim 1 or 2, wherein cutting to form said discharge opening is carried out between said filling step and said removing step.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |