US4263576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity sensitive device
Assignee: Murata Manufacturing Co Ltd
•
Filing: 1979-06-27
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Granted: 1981-04-21
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Expires: 1999-06-27
Abstract
Abstract A humidity sensitive device, including opposing electrodes formed on an insulating substrate, and a humidity sensitive film formed on the surface of the insulating substrate and at least between the opposing electrodes. The humidity sensitive film is obtained by coating on the surface of the insulating substrate a uniformly dispersed mixture including zirconium oxychloride and epoxy resin and heating the same.
Inventors
- 👤 Michihiro Murata
- 👤 Shinsei Okabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
107 words
A humidity sensitive device, comprising: an insulating substrate having a major surface; first and second electrodes formed first and second electrodes formed on said major surface of said insulating substrate and spaced from each other; first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes respectively; and a humidity sensitive film formed on said major surface of said insulating substrate and covering at least the position of said major surface located between said electrodes, said humidity sensitive film comprising an inorganic polymer mainly including zirconium, and an organic polymer having compatibility with said inorganic polymer mainly including zirconium.
Claim 2
Dependent Claim
107 words
A humidity sensitive device, comprising: an insulating substrate having a major surface; first and second electrodes formed first and second electrodes formed on said major surface of said insulating substrate and spaced from each other; first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes respectively; and a humidity sensitive film formed on said major surface of said insulating substrate and covering at least the position of said major surface located between said electrodes, said humidity sensitive film comprising an inorganic polymer mainly including zirconium, and an organic polymer having compatibility with said inorganic polymer mainly including zirconium.
Claim 3
Dependent Claim
28 words
A humidity sensitive film in accordance with claim 1, wherein said humidity sensitive film further comprises a component for controlling the electrical resistance of said humidity sensitive film.
Claim 4
Dependent Claim
32 words
A humidity sensitive device in accordance with claim 2, wherein said resistance controlling component is at least one member selected from the group consisting of conductive powder, semiconductive powder and insulating powder.
Claim 5
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 3, wherein said resistance controlling component comprises conductive powder.
Claim 6
Dependent Claim
29 words
A humidity sensitive device in accordance with claim 4, wherein said conductive powder is at least one member selected from the group consisting of carbon powder and palladium powder.
Claim 7
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 3, wherein said resistance controlling component comprises semiconductive powder.
Claim 8
Dependent Claim
50 words
A humidity sensitive device in accordance with claim 6, wherein said semiconductive powder is powder of at least one member selected from the group consisting of CrO 2 , NiO, Fe 3 O 4 , ZnO, SnO 2 , MnO 2 , TiO 2-x (0<x<2), and semiconductor alkaline earths titanates.
Claim 9
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 3, wherein said resistance controlling component comprises insulating powder.
Claim 10
Dependent Claim
41 words
A humidity sensitive device in accordance with claim 8, wherein said insulating powder comprises powder of at least one member selected from the group consisting of TiO 2 , ZrO 2 , SiO 2 , and Al 2 O 3 .
Claim 11
Dependent Claim
119 words
A humidity sensitive device, comprising: an insulating substrate having a major surface; first and second electrodes formed on said major surface of said insulating substrate and spaced from each other; first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes respectively; and a humidity sensitive film formed on said major surface of said insulating substrate and covering at least the portion of said major surface located between said electrodes; said humidity sensitive film comprising a coating disposed on said insulating substrate and covering at least the portion of said major surface located between said electrodes, said coating comprising a uniformly dispersed mixture comprising a zirconium compound and an organic polymer.
Claim 12
Dependent Claim
119 words
A humidity sensitive device, comprising: an insulating substrate having a major surface; first and second electrodes formed on said major surface of said insulating substrate and spaced from each other; first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes respectively; and a humidity sensitive film formed on said major surface of said insulating substrate and covering at least the portion of said major surface located between said electrodes; said humidity sensitive film comprising a coating disposed on said insulating substrate and covering at least the portion of said major surface located between said electrodes, said coating comprising a uniformly dispersed mixture comprising a zirconium compound and an organic polymer.
Claim 13
Dependent Claim
23 words
A humidity sensitive device in accordance with claim 10, wherein said uniformly dispersed mixture further comprises a component for controlling a resistance value.
Claim 14
Dependent Claim
32 words
A humidity sensitive device in accordance with claim 11, wherein said resistance controlling component is at least one member selected from the group consisting of conductive powder, semiconductive powder and insulating powder.
Claim 15
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 12, wherein said resistance controlling component comprises conductive powder.
Claim 16
Dependent Claim
29 words
A humidity sensitive device in accordance with claim 13, wherein said conductive powder is at least one member selected from the group consisting of carbon powder and palladium powder.
Claim 17
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 12, wherein said resistance controlling component comprises semiconductive powder.
Claim 18
Dependent Claim
50 words
A humidity sensitive device in accordance with claim 15, wherein said semiconductive powder is powder of at least one member selected from the group consisting of CrO 2 , NiO, Fe 3 O 4 , ZnO, SnO 2 , MnO 2 , TiO 2-x (0<x<2), and semiconductive alkaline earths titanates.
Claim 19
Dependent Claim
17 words
A humidity sensitive device in accordance with claim 12, wherein said resistance controlling component comprises insulating powder.
Claim 20
Dependent Claim
41 words
A humidity sensitive device in accordance with claim 17, wherein said insulating powder comprises powder of at least one member selected from the group consisting of TiO 2 , ZrO 2 , SiO 2 , and Al 2 O 3 .
Claim 21
Dependent Claim
51 words
A humidity sensitive device in accordance with claim 10, wherein said zirconium compound is at least one member selected from the group consisting of zirconium oxychloride, zirconium acetate, zirconium chloride, zirconium bromide, zirconium hydroxide, zirconium iodide, zirconium nitrate, zirconium oxybromide, zirconium oxyiodide, zirconium sulfate, and those zirconium compounds denatured by hydration.
Claim 22
Dependent Claim
22 words
A humidity sensitive device in accordance with claim 10, wherein said organic polymer is a member having compatibility with said zirconium compound.
Claim 23
Dependent Claim
29 words
A humidity sensitive device in accordance with claim 20, wherein said organic polymer is a member selected from the group consisting of epoxy resin, silicone resin, and fluorine-contained polymers.
Claim 24
Dependent Claim
37 words
A humidity sensitive device in accordance with claim 20, wherein said organic polymer is at least one water soluble polymer selected from the group consisting of ethyl cellulose, methyl cellulose, carboxymethylcellulose, hydroxyigencellulose, polyethylene oxide and polyvinyl alcohol.
Claim 25
Independent Claim
136 words
A method for manufacturing a humidity sensitive device, comprising the steps of: preparing an insulating substrate having a major surface; forming first and second electrodes on said major surface so as to be spaced apart from each other on said major surface; providing first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes, respectively; preparing a uniformly dispersed mixture including a zirconium compound and an organic polymer; coating said uniformly dispersed mixture on at least the portion of major surface of said insulating substrate located between said electrodes; and heating said uniformly dispersed mixture up to a temperature that does not decompose said organic polymer in said uniformly dispersed mixture as coated, whereby a humidity sensitive film is formed on said insulating substrate and between said electrodes.
Claim 26
Independent Claim
136 words
A method for manufacturing a humidity sensitive device, comprising the steps of: preparing an insulating substrate having a major surface; forming first and second electrodes on said major surface so as to be spaced apart from each other on said major surface; providing first and second external connection terminals electrically coupled to and for external connection of said first and second electrodes, respectively; preparing a uniformly dispersed mixture including a zirconium compound and an organic polymer; coating said uniformly dispersed mixture on at least the portion of major surface of said insulating substrate located between said electrodes; and heating said uniformly dispersed mixture up to a temperature that does not decompose said organic polymer in said uniformly dispersed mixture as coated, whereby a humidity sensitive film is formed on said insulating substrate and between said electrodes.
Claim 27
Dependent Claim
46 words
A method for manufacturing a humidity sensitive device in accordance with claim 23, wherein said step of preparing said uniformly dispersed mixture comprises the step of admixing a resistance controlling component into said uniformly dispersed mixture for controlling the electrical resistance of said uniformly dispersed mixture.
Claim 28
Dependent Claim
36 words
A method for manufacturing a humidity sensitive device in accordance with claim 24, wherein said resistance controlling component is at least one member selected from the group consisting of conductive powder, semiconductive powder and insulating powder.
Claim 29
Dependent Claim
21 words
A method for manufacturing a humidity sensitive device in accordance with claim 25, wherein said resistance controlling component comprises conductive powder.
Claim 30
Dependent Claim
33 words
A method for manufacturing a humidity sensitive device in accordance with claim 26, wherein said conductive powder is at least one member selected from the group consisting of carbon powder and palladium powder.
Claim 31
Dependent Claim
21 words
A method for manufacturing a humidity sensitive device in accordance with claim 24, wherein said resistance controlling component comprises semiconductive powder.
Claim 32
Dependent Claim
54 words
A method for manufacturing a humidity sensitive device in accordance with claim 28, wherein said semiconductive powder is powder of at least one member selected from the group consisting of CrO 2 , NiO, Fe 3 O 4 , ZnO, SnO 2 , MnO 2 , TiO 2-x (0<x<2), and semiconductive alkaline earths titanates.
Claim 33
Dependent Claim
21 words
A method for manufacturing a humidity sensitive device in accordance with claim 25, wherein said resistance controlling component comprises insulating powder.
Claim 34
Dependent Claim
45 words
A method for manufacturing a humidity sensitive device in accordance with claim 30, wherein said insulating powder comprises powder of at least one member selected from the group consisting of TiO 2 , ZrO 2 , SiO 2 , and Al 2 O 3 .
Claim 35
Dependent Claim
55 words
A method for manufacturing a humidity sensitive device in accordance with claim 23, wherein said zirconium compound is at least one member selected from the group consisting of zirconium oxychloride, zirconium acetate, zirconium chloride, zirconium bromide, zirconium hydroxide, zirconium iodide, zirconium nitrate, zirconium oxybromide, zirconium oxyiodide, zirconium sulfate, and those zirconium compounds denatured by hydration.
Claim 36
Dependent Claim
26 words
A method for manufacturing a humidity sensitive device in accordance with claim 23, wherein said organic polymer is a member having compatibility with said zirconium compound.
Claim 37
Dependent Claim
33 words
A method for manufacturing a humidity sensitive device in accordance with claim 33, wherein said organic polymer is a member selected from the group consisting of epoxy resin, silicone resin, and fluorine-contained polymers.
Claim 38
Dependent Claim
41 words
A method for manufacturing a humidity sensitive device in accordance with claim 33, wherein said organic polymer is at least one water soluble polymer selected from the group consisting of ethyl cellulose, methyl cellulose, carboxymethylcellulose, hydroxigencellulose, polyethylene oxide and polyvinyl alcohol.
References Cited (Backward Citations)
US4086556A
Cited
US4167725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |