EP0441635A1
Expired / Lapsed
EP
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Ink jet recording system
Assignee: Canon Inc
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Filing: 1991-02-07
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Granted: —
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Expires: 2011-02-07
Abstract
Abstract A recording head for discharging ink by using thermal energy comprises a plurality of outlets for discharging ink and a substrate (100) including a common substrate plate (1) of P type, a plurality of electrothermal converting elements (RH1, RH2) and a plurality of functional elements (SH1, SH2) connected to the respective electrothermal converting elements (RH1, RH2) and formed on the common substrate plate (1) as well as the electrothermal converting elements (RH1, RH2). Each of the functional elements (SH1, SH2) has a first semiconductor region (2, 5) of N type, a second semiconductor region (4) of P type provided within the first semiconductor region and a third semiconductor region (8) of N type provided within the second semiconductor region (4), so as to form a rectifying junction. The first, second and third semiconductor regions are formed by diffusion of impurity atoms in the common semiconductor substrate plate (1).
Inventors
- 👤 Shigeyuki C/O Canon Kabushiki Kaisha Matsumoto
- 👤 Asao C/O Canon Kabushiki Kaisha Saito
- 👤 Yasuhiro C/O Canon Kabushiki Kaisha Naruse
- 👤 Kei C/O Canon Kabushiki Kaisha Fujita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 05:25
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/34; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/16; B41J2/1601; B41J2/1604; B41J2/1621; B41J2/1626; B41J2/1631; B41J2/1637; B41J2/164; B41J2/1642; B41J2/1646; B41J2202/00; B41J2202/01; B41J2202/13
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
141 words
A recording head for discharging ink by using thermal energy characterized by comprising: means for defining a plurality of openings for discharging ink; and a substrate including: a common semiconductor substrate plate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate.
Claim 2
Dependent Claim
51 words
A recording head as claimed in claim 1, characterized in that said first conductivity type is P type and said plurality of functional elements have each an NPN transistor structure in which a base electrode and a collector electrode are short-circuited so as to said NPN transistor acts as a diode.
Claim 3
Dependent Claim
17 words
A recording head as claimed in claim 2, characterized in that said common substrate plate is grounded.
Claim 4
Dependent Claim
50 words
A recording head as claimed in claim 2, characterized in that a junction area of an anode electrode and a cathode electrode of said diode is not less than 5 X 10⁻⁵cm² when a driving current of said diode is less than 300 mA and not less than 200 mA.
Claim 5
Dependent Claim
50 words
A recording head as claimed in claim 2, characterized in that a junction area of an anode electrode and a cathode electrode of said diode is not less than 1 X 10⁻⁴cm² when a driving current of said diode is less than 400 mA and not less than 300 mA.
Claim 6
Dependent Claim
50 words
A recording head as claimed in claim 1, characterized in that said plurality of electrothermal converting elements are a transducers for generating thermal energies in correspondence with driving signals from said plurality of functional elements, said thermal energies cause film foiling in ink and thereby discharge ink from said openings.
Claim 7
Dependent Claim
130 words
A substrate for a recording head for discharging ink by using thermal energy characterized by comprising: a common semiconductor substrate plate of a first conductivity type; a plurality of electrothermal converting elements for generating a thermal energy; and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction; wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate.
Claim 8
Dependent Claim
164 words
An ink jet recording apparatus characterized by comprising: a recording head including; means for defining a plurality of openings for discharging ink, a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 9
Dependent Claim
251 words
A process for producing a substrate for an ink jet recording head characterized by comprising the steps of: forming a plurality of N type collector regions on a P type semiconductor substrate plate by ion implantation and thermal diffusion; forming respective lowly doped P type base regions within said plurality of N type collector regions by ion implantation and thermal diffusion; forming respective P type isolation regions surrounding said plurality of N type collector regions and at a distance from said N type collector regions by thermal diffusion of impurities; forming highly doped P⁺ regions on said P type isolation regions and on respective inner peripheral portions of said lowly doped P type base regions by ion implantation; forming highly doped N⁺ regions on said N type collector regions and at respective portions within said lowly doped P type base region by thermal diffusion of impurities; depositing and patterning aluminum or aluminum alloy to form isolation electrodes on said P⁺ regions on said P type isolation regions, emitter electrodes on said N⁺ regions within said lowly doped P type base region and collector-base common electrodes on said N⁺ regions on said N type collector regions and said P⁺ regions on said lowly doped P type base regions; forming a layer made of a high electrical resistance material for heat generating elements on the surface of said substrate plate via an insulation layer; and forming wirings for connecting respective said heat generating elements to said emitter electrodes and said collector-base common electrodes.
Claim 10
Dependent Claim
164 words
A copying machine characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 11
Dependent Claim
164 words
A facsimile apparatus characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 12
Dependent Claim
164 words
A word processor characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 13
Dependent Claim
165 words
An optical disc apparatus characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 14
Dependent Claim
164 words
A work station characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 15
Dependent Claim
163 words
A computer characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; and transport means for carrying a recording medium to a recording position of said recording head.
Claim 16
Dependent Claim
214 words
A portable printer characterized by comprising: an ink jet recording unit including: means for defining a plurality of openings for discharging ink; a substrate having a common semiconductor substrate of a first conductivity type, a plurality of electrothermal converting elements for generating a thermal energy, and a plurality of functional elements electrically connected to respective electrothermal converting elements, each of said functional elements having a first semiconductor region of a second conductivity type different from said first conductivity type, a second semiconductor region of the first conductivity type provided within said first semiconductor region and a third semiconductor region of said second conductivity type provided within said second semiconductor region, so as to form a rectifying junction, wherein said first, second and third semiconductor regions are formed by diffusion of impurity atoms in said common semiconductor substrate plate; ink feed means for supplying ink into said recording head; transport means for carrying a recording medium to a recording position of said recording head; means receiving processed information to be recorded from an external utilizing apparatus for controlling said plurality of functional elements in accordance with said processed information; and means receiving controlling data from said external utilizing apparatus for controlling said ink feed means and said transport means in accordance with said controlling data.
Claim 17
Dependent Claim
35 words
A recording head for a printer comprising a substrate having a plurality of active devices thereon, said active devices including a plurality of rectifying elements which can be independently driven, said elements being positively separated.
Claim 18
Dependent Claim
41 words
A recording head for a printer including a plurality of active devices on a substrate including means for connecting the substrate to prevent the application thereto of an electric potential which would exert an adverse effect on ink to be printed.
Claim 19
Independent Claim
26 words
A method of fabricating a thermal printer head comprising the use of impurity diffusion to form a plurality of active devices on the print head substrate.
Claim 20
Dependent Claim
23 words
A substrate for a printer head comprising a plurality of driving transistors each including a shorting path between the base and collector thereof.
Claim 21
Dependent Claim
18 words
A thermal print head substrate comprising a plurality of active elements separated by isolation electrodes which are grounded.
Claim 22
Dependent Claim
42 words
A substrate for a thermal printer head including a plurality of transistors having a shorting path between the base and collector thereof and means for applying a driving voltage thereto, the emitters thereof being connected to a plurality of ink ejection elements.
Claim 23
Dependent Claim
12 words
A print head substrate comprising a plurality of transistors having shallow emitters.
References Cited (Backward Citations)
EP0369347A2
Cited
EP0378439A2
Cited
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