US4577202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid jet recording head
Assignee: Canon Inc
•
Filing: 1983-12-07
•
Granted: 1986-03-18
•
Expires: 2003-12-07
Abstract
Abstract A liquid jet recording head, comprising a liquid discharging section having an orifice for discharging liquid to form liquid droplets and a liquid pathway, being connected to said orifice and having a heat acting portion at which heat energy for forming liquid droplets acts on liquid as a part of its constitution, a common liquid chamber for storage of said liquid to be supplied to said pathway and an electro-thermal transducer, having at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate thereby forming a heat generating section between these electrodes, characterized in that an upper layer comprises a first layer constituted of an inorganic dielectric material, a second layer constituted of an organic material and a third layer constituted of an inorganic material, these layers being laminated in this order from the side of said electrodes on at least the portion of said electrodes lying beneath said common liquid chamber or on the portion at the upstream side of said heat generating portion.
Inventors
- 👤 Toshitami Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/16; B41J2/1601; B41J2/1604; B41J2/1621; B41J2/1623; B41J2/1626; B41J2/1631; B41J2/164; B41J2/1642; B41J2/1645; B41J2/1646
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
159 words
A liquid jet recording head, comprising: a liquid discharging section having an orifice for discharging liquid in liquid droplets and a liquid pathway connected to said orifice, said liquid pathway having a heat acting portion for applying heat energy to liquid in said portion for forming liquid droplets; a liquid chamber for storage of liquid to be supplied to said liquid pathway; an electro-thermal transducer including at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate for forming a heat generating section between said electrodes, at least one of said electrodes having a least a portion thereof underlying said liquid chamber; and an upper layer on at least said portion of said one electrode and including a first layer comprising an inorganic dielectric material, a second layer comprising an organic material and a third layer comprising an inorganic material, laminated in this order from the surface of said one electrode.
Claim 2
Dependent Claim
159 words
A liquid jet recording head, comprising: a liquid discharging section having an orifice for discharging liquid in liquid droplets and a liquid pathway connected to said orifice, said liquid pathway having a heat acting portion for applying heat energy to liquid in said portion for forming liquid droplets; a liquid chamber for storage of liquid to be supplied to said liquid pathway; an electro-thermal transducer including at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate for forming a heat generating section between said electrodes, at least one of said electrodes having a least a portion thereof underlying said liquid chamber; and an upper layer on at least said portion of said one electrode and including a first layer comprising an inorganic dielectric material, a second layer comprising an organic material and a third layer comprising an inorganic material, laminated in this order from the surface of said one electrode.
Claim 3
Dependent Claim
22 words
A liquid jet recording head according to claim 1, wherein the inorganic dielectric material of the first layer is an inorganic oxide.
Claim 4
Dependent Claim
22 words
A liquid jet recording head according to claim 1, wherein the inorganic dielectric material of the first layer is an inorganic nitride.
Claim 5
Dependent Claim
29 words
A liquid jet recording head according to claim 1, wherein the inorganic dielectric material of the first layer is a complex of an inorganic oxide and an inorganic nitride.
Claim 6
Dependent Claim
22 words
A liquid jet recording head according to claim 1, wherein the first layer is constituted of a high resistance thin film material.
Claim 7
Dependent Claim
21 words
A liquid jet recording head according to claim 1, wherein the first layer has a thickness of 0.1 to 5 μm.
Claim 8
Dependent Claim
20 words
A liquid jet recording head according to claim 1, wherein the organic material of the second layer is a resin.
Claim 9
Dependent Claim
22 words
A liquid jet recording head according to claim 1, wherein the organic material of the second layer is an organic compound monomer.
Claim 10
Dependent Claim
23 words
A liquid jet recording head according to claim 1, wherein the second layer is constituted of a hardened film of a photosensitive resin.
Claim 11
Dependent Claim
21 words
A liquid jet recording head according to claim 1, wherein the second layer has a thickness of 0.1 to 20 μm.
Claim 12
Dependent Claim
28 words
A liquid jet recording head according to claim 1, wherein the inorganic material of the third layer contains an element of the group III of the periodic table.
Claim 13
Dependent Claim
28 words
A liquid jet recording head according to claim 1, wherein the inorganic material of the third layer contains an element of the group IV of the periodic table.
Claim 14
Dependent Claim
28 words
A liquid jet recording head according to claim 1, wherein the inorganic material of the third layer contains an element of the group VI of the periodic table.
Claim 15
Dependent Claim
28 words
A liquid jet recording head according to claim 1, wherein the inorganic material of the third layer contains an element of the group VIII of the periodic table.
Claim 16
Dependent Claim
22 words
A liquid jet recording head according to claim 1, wherein the third layer has a specific resistivity of 1 ohm.cm or less.
Claim 17
Dependent Claim
31 words
A liquid jet recording head according to claim 1, wherein the third layer is formed of an inorganic material in combination with an inorganic dielectric material for forming the first layer.
Claim 18
Dependent Claim
21 words
A liquid jet recording head according to claim 1, wherein the third layer has a thickness of 0.01 to 5 μm.
Claim 19
Dependent Claim
140 words
A liquid jet recording head, comprising: an orifice for discharging liquid liquid droplets; a liquid pathway for providing a flow path for liquid to said orifice and having a heat acting portion for applying heat energy to liquid in said portion for forming liquid droplets; an electro-thermal transducer including at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided along said liquid pathway for forming a heat generating section between said electrodes; and an upper layer on at least a portion of one of said electrodes upstream of said heat generating portion of said upper layer including a first layer comprising an inorganic dielectric material, a second layer comprising an organic material and a third layer comprising an inorganic material, laminated in this order from the surface of said portion of said one electrode.
Claim 20
Dependent Claim
140 words
A liquid jet recording head, comprising: an orifice for discharging liquid liquid droplets; a liquid pathway for providing a flow path for liquid to said orifice and having a heat acting portion for applying heat energy to liquid in said portion for forming liquid droplets; an electro-thermal transducer including at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided along said liquid pathway for forming a heat generating section between said electrodes; and an upper layer on at least a portion of one of said electrodes upstream of said heat generating portion of said upper layer including a first layer comprising an inorganic dielectric material, a second layer comprising an organic material and a third layer comprising an inorganic material, laminated in this order from the surface of said portion of said one electrode.
Claim 21
Dependent Claim
22 words
A liquid jet recording head according to claim 18, wherein the inorganic dielectric material of the first layer is an inorganic oxide.
Claim 22
Dependent Claim
22 words
A liquid jet recording head according to claim 18, wherein the inorganic dielectric material of the first layer is an inorganic nitride.
Claim 23
Dependent Claim
29 words
A liquid jet recording head according to claim 18, wherein the inorganic dielectric material of the first layer is a complex of an inorganic oxide and an inorganic nitride.
Claim 24
Dependent Claim
22 words
A liquid jet recording head according to claim 18, wherein the first layer is constituted of a high resistance thin film material.
Claim 25
Dependent Claim
21 words
A liquid jet recording head according to claim 18, wherein the first layer has a thickness of 0.1 to 5 μm.
Claim 26
Dependent Claim
20 words
A liquid jet recording head according to claim 18, wherein the organic material of the second layer is a resin.
Claim 27
Dependent Claim
22 words
A liquid jet recording head according to claim 18, wherein the organic material of the second layer is an organic compound monomer.
Claim 28
Dependent Claim
23 words
A liquid jet recording head according to claim 18, wherein the second layer is constituted of a hardened film of a photosensitive resin.
Claim 29
Dependent Claim
21 words
A liquid jet recording head according to claim 18, wherein the second layer has a thickness of 0.1 to 20 μm.
Claim 30
Dependent Claim
28 words
A liquid jet recording head according to claim 18, wherein the inorganic material of the third layer contains an element of the group III of the periodic table.
Claim 31
Dependent Claim
28 words
A liquid jet recording head according to claim 18, wherein the inorganic material of the third layer contains an element of the group IV of the periodic table.
Claim 32
Dependent Claim
28 words
A liquid jet recording head according to claim 18, wherein the inorganic material of the third layer contains an element of the group VI of the periodic table.
Claim 33
Dependent Claim
28 words
A liquid jet recording head according to claim 18, wherein the inorganic material of the third layer contains an element of the group VIII of the periodic table.
Claim 34
Dependent Claim
22 words
A liquid jet recording head according to claim 18, wherein the third layer has a specific resistivity of 1 ohm.cm or less.
Claim 35
Dependent Claim
31 words
A liquid jet recording head according to claim 18, wherein the third layer is formed of an inorganic material in combination with an inorganic dielectric material for forming the first layer.
Claim 36
Dependent Claim
21 words
A liquid jet recording head according to claim 18, wherein the third layer has a thickness of 0.01 to 5 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |