US4657631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a liquid jet recording head
Assignee: Canon Inc
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Filing: 1985-12-20
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Granted: 1987-04-14
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Expires: 2005-12-20
Abstract
Abstract A liquid jet recording head is produced by (a) forming a solid layer comprising a photoresist of a positive type photosensitive material on a substrate in accordance with the pattern of the liquid flow path, (b) filling up the recess on the substrate where the solid layer is not present, with a liquid flow path wall forming material, and (c) removing the solid layer from the substrate.
Inventors
- 👤 Hiromichi Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:01
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/164; B41J2/1646; B41J2/1601; B41J2/1604; B41J2/1623; B41J2/1626; B41J2/1629; B41J2/1631; B41J2/1637; B41J2/1639; B41J2/1642; B41J2/1643
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
101 words
A process for producing a liquid jet recording head comprising a liquid flow path, a liquid ejection port communicating with the liquid flow path, and a liquid ejection energy generating member arranged along the liquid flow path which comprises the steps of: (a) forming a solid layer comprising a photoresist of a positive type photosensitive material on a substrate in accordance with the pattern of the liquid flow path, (b) filling up the recess on the substrate where the solid layer is not present, with a liquid flow path wall forming material, and (c) removing the solid layer from the substrate.
Claim 2
Dependent Claim
101 words
A process for producing a liquid jet recording head comprising a liquid flow path, a liquid ejection port communicating with the liquid flow path, and a liquid ejection energy generating member arranged along the liquid flow path which comprises the steps of: (a) forming a solid layer comprising a photoresist of a positive type photosensitive material on a substrate in accordance with the pattern of the liquid flow path, (b) filling up the recess on the substrate where the solid layer is not present, with a liquid flow path wall forming material, and (c) removing the solid layer from the substrate.
Claim 3
Dependent Claim
20 words
The process according to claim 1 in which the positive type photosensitive material is a positive type photosensitive dry film.
Claim 4
Dependent Claim
19 words
The process according to claim 1 in which the liquid flow path forming material is a liquid curing material.
Claim 5
Dependent Claim
20 words
The process according to claim 1 in which the liquid flow path forming material is a metal or metal compound.
Claim 6
Dependent Claim
24 words
The process according to claim 1 in which the liquid flow path side walls and the liquid flow path upper wall are formed integrally.
Claim 7
Dependent Claim
29 words
The process according to claim 1 in which in step (b) the liquid flow path side walls are formed and then the liquid flow path upper wall is formed.
Claim 8
Dependent Claim
24 words
The process according to claim 1 in which after step (c) there is additionally a step of forming a liquid flow path upper wall.
Claim 9
Dependent Claim
22 words
The process according to claim 1 in which before step (c) there is a step of irradiating the solid layer with light.
Claim 10
Dependent Claim
13 words
The process according to claim 8 in which the light is ultraviolet ray.
Claim 11
Dependent Claim
33 words
The process according to claim 4 in which the metal is at least one of the metals selected from the group of Cu, Ag, Au, Ni, Cr, Sn, Pb, Zn, Al and Ti.
Claim 12
Dependent Claim
16 words
The process according to claim 3 in which the liquid curing material is curable by heat.
Claim 13
Dependent Claim
17 words
The process according to claim 3 in which the liquid curing material is curable by ultraviolet radiation.
Claim 14
Dependent Claim
18 words
The process according to claim 3 in which the liquid curing material is curable by an electron beam.
Claim 15
Dependent Claim
46 words
The process according to claim 3 in which the liquid curing material is at least one of the materials selected from the group of epoxy resins, acrylic resins, diglycol dialkyl carbonate resins, unsaturated polyester resins, polyurethane resins, polyimide resins, melamine resins, phenolic resins and urea resins.
Claim 16
Dependent Claim
14 words
The process according to claim 1 in which the substrate is composed of glass.
Claim 17
Dependent Claim
15 words
The process according to claim 1 in which the substrate is composed of a ceramic.
Claim 18
Dependent Claim
14 words
The process according to claim 1 in which the substrate is composed of metal.
Claim 19
Dependent Claim
19 words
The process according to claim 1 in which the liquid ejection energy generating member is provided on the substrate.
Claim 20
Dependent Claim
29 words
The process according to claim 1 in which the direction of liquid ejection is substantially the same as the direction in which liquid flow in the liquid flow path.
Claim 21
Dependent Claim
28 words
The process according to claim 1 in which the direction of liquid ejection is substantially perpendicular to the direction in which liquid flows in the liquid flow path.
Claim 22
Dependent Claim
19 words
The process according to claim 1 in which the liquid ejection energy generating member includes is an electro-thermal transducer.
Claim 23
Dependent Claim
18 words
The process according to claim 1 in which the liquid ejection energy generating member includes a piezoelectric element.
Claim 24
Dependent Claim
26 words
The process according to claim 1, further comprising the step of forming the liquid ejection energy generating member on the substrate in advance of step (a).
Claim 25
Dependent Claim
35 words
The process according to claim 1 in which the liquid flow path includes a feed flow path toward the port and a common liquid chamber for supplying the liquid to the fine liquid flow path.
Claim 26
Dependent Claim
16 words
The process according to claim 1 in which the positive type photosensitive material is a liquid.
Claim 27
Dependent Claim
26 words
The process according to claim 1 in which the positive type photosensitive material is a material comprising an o-naphthoquinone diazide and an alkali soluble phenolic resin.
Claim 28
Dependent Claim
35 words
The process according to claim 1 in which the positive type photosensitive material is a material comprising an alkali soluble resin and a substance capable of finally forming phenol by photolysis of a diazonium salt.
References Cited (Backward Citations)
US4536250A
Cited
US4549188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |