Patent US4492573A successfully refreshed from Google Patents.
Patent US5049231A successfully refreshed from Google Patents.
US5049231A
Expired / Lapsed
US
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Method of manufacturing liquid injection recording head and substrate therefor
Assignee: Canon Inc
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Filing: 1989-11-28
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Granted: 1991-09-17
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Expires: 2009-11-28
Abstract
Abstract A method of forming a liquid jet recording head includes the steps of forming multiple resistive heaters and corresponding electrode pairs on a substrate, one of the electrodes in each pair being connected to a common test electrode formed on the substrate. After the head is tested to determine if there are any defects in a protective layer on the heaters and electrode pairs, the portion of the substrate carrying the test electrode is removed.
Inventors
- 👤 Makoto Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
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; B41J2/1635
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
171 words
A method for fabricating a liquid jet recording head having at least one predetermined liquid path through which liquid passes, said liquid path communicating with an orifice in the recording head, said method comprising the steps of: forming a heat resistor layer on a substrate to be provided in each liquid path for generating energy capable of discharging the liquid from the orifice; forming a plurality of pairs of electrodes electrically connected to said heat resistor layer, each said pair of electrodes being electrodes by which voltage can be applied to said heat resistor layer, wherein one electrode of each of said pairs of electrodes is connected to a common electrode; forming at least one liquid path for passage of the liquid by connecting said substrate provided with said heat resistor layer and said pairs of electrodes, and a member provided with a space for forming the liquid path with the space being oriented between said member and said substrate; and thereafter cutting said pairs of electrodes from said common electrode.
Claim 2
Independent Claim
171 words
A method for fabricating a liquid jet recording head having at least one predetermined liquid path through which liquid passes, said liquid path communicating with an orifice in the recording head, said method comprising the steps of: forming a heat resistor layer on a substrate to be provided in each liquid path for generating energy capable of discharging the liquid from the orifice; forming a plurality of pairs of electrodes electrically connected to said heat resistor layer, each said pair of electrodes being electrodes by which voltage can be applied to said heat resistor layer, wherein one electrode of each of said pairs of electrodes is connected to a common electrode; forming at least one liquid path for passage of the liquid by connecting said substrate provided with said heat resistor layer and said pairs of electrodes, and a member provided with a space for forming the liquid path with the space being oriented between said member and said substrate; and thereafter cutting said pairs of electrodes from said common electrode.
Claim 3
Dependent Claim
46 words
A method according to claim 1, wherein said method further comprises the step of executing an electric test before cutting said pairs of electrodes from said common electrode and after the formation of said paris of electrodes, said electric test being executed using said common electrode.
Claim 4
Dependent Claim
33 words
A method according to claim 1, wherein said method further comprises the step of forming a protective layer on said pairs of electrodes, before cutting said pairs of electrodes from said common electrode.
Claim 5
Dependent Claim
33 words
A method according to claim 2, wherein said method further comprises the step of forming a protective layer on said pairs of electrodes, before cutting said pairs of electrodes from said common electrode.
Claim 6
Dependent Claim
52 words
A method for fabricating plural liquid recording heads utilizing a single substrate, comprising the steps of: forming a plurality of recording heads, according to said forming steps in claim 1, on the substrate; and providing said plural heads by severing the substrate to cut said plurality of recording heads from one another.
Claim 7
Dependent Claim
26 words
A method according to claim 5, wherein said pairs of electrodes are cut from said common electrode when said plural heads are cut from one another.
Claim 8
Dependent Claim
18 words
A method according to claim 1, wherein said electrodes are formed on top of said heat resistor layer.
Claim 9
Independent Claim
199 words
A method for fabricating a liquid jet recording head having at least one predetermined liquid path through which liquid passes, said liquid path communicating with an orifice in the recording head from which liquid is discharged, the recording head comprising a heat resistor layer and a plurality of pairs of electrodes, the heat resistor layer being provided in at least one liquid path and being formed on a substrate, and the plurality of pairs of electrodes being electrically connected to said heat resistor layer, each said pair of electrodes being electrodes by which voltage can be applied to said heat resistor layer for generating energy capable of discharging the liquid from the orifice, said method comprising the steps of: forming at least a common electrode to which one electrode of each of said pairs of electrodes is connected; forming at least one liquid path for the passage of the liquid by connecting said substrate provided with said heat resistor layer and said pairs of electrodes, and a member provided with a space for forming the liquid path with the space being oriented between said member and said substrate; and thereafter cutting said pairs of electrodes from said common electrode.
Claim 10
Independent Claim
199 words
A method for fabricating a liquid jet recording head having at least one predetermined liquid path through which liquid passes, said liquid path communicating with an orifice in the recording head from which liquid is discharged, the recording head comprising a heat resistor layer and a plurality of pairs of electrodes, the heat resistor layer being provided in at least one liquid path and being formed on a substrate, and the plurality of pairs of electrodes being electrically connected to said heat resistor layer, each said pair of electrodes being electrodes by which voltage can be applied to said heat resistor layer for generating energy capable of discharging the liquid from the orifice, said method comprising the steps of: forming at least a common electrode to which one electrode of each of said pairs of electrodes is connected; forming at least one liquid path for the passage of the liquid by connecting said substrate provided with said heat resistor layer and said pairs of electrodes, and a member provided with a space for forming the liquid path with the space being oriented between said member and said substrate; and thereafter cutting said pairs of electrodes from said common electrode.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein said electrodes are disposed on top of said heat resistor layer.
Claim 12
Dependent Claim
24 words
A method according to claim 1, wherein said heat resistor layer is formed in patterns corresponding to patterns formed by said pairs of electrodes.
Claim 13
Dependent Claim
34 words
A method according to claim 1, wherein said step of cutting said pairs of electrodes comprises dicing the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 14
Dependent Claim
34 words
A method according to claim 1, wherein said step of cutting said pairs of electrodes comprises etching the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 15
Dependent Claim
38 words
A method according to claim 1, wherein said step of cutting said pairs of electrodes comprises exposing the connection between said pairs of electrodes and said common electrode with a laser beam so that the connection is severed.
Claim 16
Dependent Claim
19 words
A method according to claim 1, wherein said common electrode is formed at a position proximate to the orifice.
Claim 17
Dependent Claim
20 words
A method according to claim 1, wherein said common electrode is formed at a position spaced away from the orifice.
Claim 18
Dependent Claim
35 words
A method according to claim 1, wherein said member is a grooved plate and the liquid path is formed by securing said grooved plate over the liquid path, whereby a groove defines the liquid path.
Claim 19
Dependent Claim
52 words
A method according to claim 1, wherein said member is a flat plate and the liquid path is formed by applying a resin on either side of the liquid path and securing said flat plate to said resin, whereby a space formed by said resin and said plate defines the liquid path.
Claim 20
Dependent Claim
34 words
A method according to claim 2, further comprising the step of applying a voltage between said common electrode through an electrolytic solution provided over a portion of said common electrode and a test electrode.
Claim 21
Dependent Claim
55 words
A method according to claim 2, further comprising the steps of: forming a protective layer over a portion of said pairs of electrodes; forming an anti-cavitation layer over a portion of the protective layer; and applying a voltage between said anti-cavitation layer and a portion of the electrode not covered by the said protective layer.
Claim 22
Dependent Claim
35 words
A method according to claim 5, wherein said plurality of recording heads are arranged on said single substrate in a paired, back-to-back relationship, so as to share a common electrode positioned between paired recording heads.
Claim 23
Dependent Claim
30 words
A method according to claim 5, wherein said plurality of recording heads are arranged on said single substrate so as to have a uniform orientation with respect to said substrate.
Claim 24
Dependent Claim
24 words
A method according to claim 8, wherein said heat resistor layer is formed in patterns corresponding to patterns formed by said pairs of electrodes.
Claim 25
Dependent Claim
34 words
A method according to claim 8, wherein said step of cutting said pairs of electrodes comprises dicing the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 26
Dependent Claim
34 words
A method according to claim 8, wherein said step of cutting said pairs of electrodes comprises etching the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 27
Dependent Claim
38 words
A method according to claim 8, wherein said step of cutting said pairs of electrodes comprises exposing the connection between said pairs of electrodes and said common electrode with a laser beam so that the connection is severed.
Claim 28
Dependent Claim
19 words
A method according to claim 8, wherein said common electrode is formed at a position proximate to the orifice.
Claim 29
Dependent Claim
20 words
A method according to claim 8, wherein said common electrode is formed at a position spaced away from the orifice.
Claim 30
Dependent Claim
35 words
A method according to claim 8, wherein said member is a grooved plate and the liquid path is formed by securing said grooved plate over the liquid path, whereby a groove defines the liquid path.
Claim 31
Dependent Claim
52 words
A method according to claim 8, wherein said member is a flat plate and the liquid path is formed by applying a resin on either side of the liquid path and securing said flat plate to said resin, whereby a space formed by said resin and said plate defines the liquid path.
Claim 32
Dependent Claim
34 words
A method according to claim 8, further comprising the step of applying a voltage between said common electrode through an electrolytic solution provided over a portion of said common electrode and a test electrode.
Claim 33
Dependent Claim
43 words
A method according to claim 8, further comprising the step of executing an electric test before cutting said pairs of electrodes from said common electrode and after the formation of said pairs of electrodes, said electric test being executed using said common electrode.
Claim 34
Independent Claim
93 words
A method for fabricating a substrate for a liquid jet recording head comprising the steps of: forming a heat resistor layer on a substrate for generating energy capable of discharging a liquid; forming a plurality of pairs of electrodes on said substrate electrically connected to said heat resistor layer, each said pair of electrodes being electrodes to which voltage can be applied to said heat resistor layer, wherein one electrode of each of said pairs of electrodes is connected to a common electrode; and cutting said pairs of electrodes from said common electrode.
Claim 35
Independent Claim
93 words
A method for fabricating a substrate for a liquid jet recording head comprising the steps of: forming a heat resistor layer on a substrate for generating energy capable of discharging a liquid; forming a plurality of pairs of electrodes on said substrate electrically connected to said heat resistor layer, each said pair of electrodes being electrodes to which voltage can be applied to said heat resistor layer, wherein one electrode of each of said pairs of electrodes is connected to a common electrode; and cutting said pairs of electrodes from said common electrode.
Claim 36
Dependent Claim
24 words
A method according to claim 32, wherein said heat resistor layer is formed in patterns corresponding to patterns formed by said pairs of electrodes.
Claim 37
Dependent Claim
34 words
A method according to claim 32, wherein said step of cutting said pairs of electrodes comprises dicing the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 38
Dependent Claim
34 words
A method according to claim 32, wherein said step of cutting said pairs of electrodes comprises etching the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 39
Dependent Claim
38 words
A method according to claim 32, wherein said step of cutting said pairs of electrodes comprises exposing the connection between said pairs of electrodes and said common electrode with a laser beam so that the connection is severed.
Claim 40
Dependent Claim
34 words
A method according to claim 32, further comprising the step of applying a voltage between said common electrode through an electrolytic solution provided over a portion of said common electrode and a test electrode.
Claim 41
Dependent Claim
43 words
A method according to claim 32, further comprising the step of executing an electric test before cutting said pairs of electrodes from said common electrode and after the formation of said pairs of electrodes, said electric test being executed using said common electrode.
Claim 42
Dependent Claim
53 words
A method according to claim 32, further comprising the steps of: forming a protective layer over a portion of said electrodes; forming an anti-cavitation layer over a portion of the protective layer; and applying a voltage between said anti-cavitation layer and a portion of the electrode not covered by the said protective layer.
Claim 43
Independent Claim
90 words
A method for fabricating a substrate for a liquid jet recording head having a heat resistor layer for generating energy, and a plurality of pairs of electrodes electrically connected to said heat resistor layer, each said pair of electrodes being electrodes to which voltage can be applied to said heat resistor layer, said method comprising the steps of: forming at least a common electrode on said substrate to which one electrode of each of said pairs of electrodes is connected; and cutting said pairs of electrodes from said common electrode.
Claim 44
Independent Claim
90 words
A method for fabricating a substrate for a liquid jet recording head having a heat resistor layer for generating energy, and a plurality of pairs of electrodes electrically connected to said heat resistor layer, each said pair of electrodes being electrodes to which voltage can be applied to said heat resistor layer, said method comprising the steps of: forming at least a common electrode on said substrate to which one electrode of each of said pairs of electrodes is connected; and cutting said pairs of electrodes from said common electrode.
Claim 45
Dependent Claim
24 words
A method according to claim 40, wherein said heat resistor layer is formed in patterns corresponding to patterns formed by said pairs of electrodes.
Claim 46
Dependent Claim
34 words
A method according to claim 40, wherein said step of cutting said pairs of electrodes comprises dicing the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 47
Dependent Claim
34 words
A method according to claim 40, wherein said step of cutting said pairs of electrodes comprises etching the connection between said pairs of electrodes and said common electrode so that the connection is severed.
Claim 48
Dependent Claim
38 words
A method according to claim 40, wherein said step of cutting said pairs of electrodes comprises exposing the connection between said pairs of electrodes and said common electrode with a laser beam so that the connection is severed.
Claim 49
Dependent Claim
34 words
A method according to claim 40, further comprising the step of applying a voltage between said common electrode through an electrolytic solution provided over a portion of said common electrode and a test electrode.
Claim 50
Dependent Claim
43 words
A method according to claim 40, further comprising the step of executing an electric test before cutting said pairs of electrodes from said common electrode and after the formation of said pairs of electrodes, said electric test being executed using said common electrode.
Claim 51
Dependent Claim
55 words
A method according to claim 40, further comprising the steps of: forming a protective layer over a portion of said pairs of electrodes; forming an anti-cavitation layer over a portion of the protective layer; and applying a voltage between said anti-cavitation layer and a portion of the electrode not covered by the said protective layer.
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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |