EP0378439A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Recording head
Assignee: Canon Inc
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Filing: 1990-01-12
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Granted: —
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Expires: 2010-01-12
Abstract
Abstract An ink jet recording apparatus having a recording head wherein an electrothermal converting element for generating the emission energy and a semiconductor functional element are integrally formed within a semiconductor substrate. The functional element with base and collector shorted is electrically connected to the electrothermal converting element. Thereby, variation in ink emission is limited so that recording head can record high quality image is provided.
Inventors
- 👤 Kei Fujita
- 👤 Hiroshi Nakano
- 👤 Toshihiko Ichise
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 06:34
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; B41J2/1626; B41J2/1629; B41J2/164; B41J2/1642; B41J2/1646; B41J2202/00; B41J2202/01; B41J2202/13
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
62 words
An ink jet recording head having a discharge port to discharge an ink, wherein: an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, and a base and a collector of the transistor element are short-circuited and electrically connected to the electric/thermal converting element.
Claim 2
Dependent Claim
62 words
An ink jet recording head having a discharge port to discharge an ink, wherein: an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, and a base and a collector of the transistor element are short-circuited and electrically connected to the electric/thermal converting element.
Claim 3
Dependent Claim
69 words
An ink jet recording head having a discharge port to discharge an ink, wherein: an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, and a base and a collector of the transistor element are short-circuited and an emitter of the transistor element is electrically connected to the electric/thermal converting element.
Claim 4
Dependent Claim
69 words
An ink jet recording head having a discharge port to discharge an ink, wherein: an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, and a base and a collector of the transistor element are short-circuited and an emitter of the transistor element is electrically connected to the electric/thermal converting element.
Claim 5
Dependent Claim
17 words
A head according to claim 1 or 2, wherein said transistor element is an NPN type transistor.
Claim 6
Dependent Claim
16 words
A head according to claim 1 or 2, wherein said transistor element is PNP type transistor.
Claim 7
Dependent Claim
32 words
A head according to claim 2, wherein said transistor element is formed in a semiconductor region which exists on a P type semiconductor substrate and which was formed by an epitaxial growth.
Claim 8
Dependent Claim
32 words
A head according to claim 1, wherein said transistor element is formed in a semiconductor region which exists on an N type semiconductor substrate and which was formed by an epitaxial growth.
Claim 9
Dependent Claim
48 words
A head according to claim 1, wherein said transistor element is formed in a semiconductor region which exists on an N type semiconductor substrate and whose circumference is surrounded by an isolation region comprising an N type semiconductor, and said isolation region is held in a positive potential.
Claim 10
Dependent Claim
48 words
A head according to claim 2, wherein said transistor element is formed in a semiconductor region which exists on a P type semiconductor substrate and whose circumference is surrounded by an isolation region comprising a P type semiconductor, and said isolation region is held in an earth potential.
Claim 11
Dependent Claim
40 words
A head according to claim 1, wherein said transistor element is formed on an N type semiconductor substrate having an impurity concentration which lies within a range from 1 x 10 12 to 1 x 10 16 cm- 3 .
Claim 12
Dependent Claim
36 words
A head according to claim 2, wherein said transistor element is formed on a P type semiconductor substrate having an impurity concentration which lies within a range from 1 x 10 12to 1 x 1016 cm-3.
Claim 13
Dependent Claim
34 words
A head according to claim 1 or 2, wherein said electric/thermal converting element is formed as a thin film through an insulative film on a semiconductor region in which the transistor element is formed.
Claim 14
Dependent Claim
30 words
A head according to claim 1 or 2, wherein a plurality of said electric/thermal converting elements and a plurality of said transistor elements are provided and connected like a matrix.
Claim 15
Dependent Claim
61 words
A head according to claim 2, wherein said transistor element includes: a buried region comprising an N type semiconductor having an impurity concentration of 1 x 10 19 cm- 3 or more; and a base region comprising a P type semiconductor having an impurity concentration which lies within a range from 1 x 10' 3 to 1 x 10 15 cm-3.
Claim 16
Dependent Claim
46 words
An ink jet recording apparatus having a carriage on which a recording head according to claim 1 or 2 is mounted and means for conveying a recording medium, wherein said ink jet recording apparatus has bias means for biasing the semiconductor substrate of the recording head.
Claim 17
Dependent Claim
38 words
An ink jet recording head according to any one of the preceding claims 1 to 13 wherein said electric/thermal converting element of said head is so arranged and is operable to generate thermal energy to discharge the ink.
Claim 18
Dependent Claim
42 words
An ink jet recording head having: a discharge port to discharge an ink, wherein an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate.
Claim 19
Dependent Claim
42 words
An ink jet recording head having: a discharge port to discharge an ink, wherein an electric/thermal converting element thereof for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate.
Claim 20
Dependent Claim
54 words
An ink jet recording head having: a discharge port to discharge an ink, an electric/thermal converting element for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element wherein a base and a collector of the transistor element are short-circuited and electrically connected to the electric/thermal converting element.
Claim 21
Dependent Claim
54 words
An ink jet recording head having: a discharge port to discharge an ink, an electric/thermal converting element for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element wherein a base and a collector of the transistor element are short-circuited and electrically connected to the electric/thermal converting element.
Claim 22
Dependent Claim
67 words
An ink jet recording head: having a discharge port to discharge an ink, an electric/thermal converting element for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, wherein a base and a collector of the transistor element are short-circuited and an emitter. of the transistor element is electrically connected to the electric/thermal converting element.
Claim 23
Dependent Claim
67 words
An ink jet recording head: having a discharge port to discharge an ink, an electric/thermal converting element for generating thermal energy and a transistor element which is electrically connected to the electric/thermal converting element are formed on a semiconductor substrate, wherein a base and a collector of the transistor element are short-circuited and an emitter. of the transistor element is electrically connected to the electric/thermal converting element.
References Cited (Backward Citations)
No citation records indexed.
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