US5987992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic sensor with temperature compensation capacitor
Assignee: Murata Manufacturing Co Ltd
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Filing: 1998-01-13
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Granted: 1999-11-23
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Expires: 2018-01-13
Abstract
Abstract An ultrasonic sensor has a built-in temperature compensation capacitor housed in a casing and facilitates an inside-the-casing lead-wire bonding connection process and a connection verifying process while increasing reliability. The ultrasonic sensor is provided with a piezoelectric vibration element and a capacitor for temperature compensation capacitor both housed in a casing. The temperature compensation capacitor includes a pair of electrodes located on one common surface of a dielectric body thus allowing the ultrasonic sensor to be electrically connected to lead wires on the one common surface.
Inventors
- 👤 Koichi Watanabe
- 👤 Chitaka Ochiai
- 👤 Junshi Ohta
- 👤 Masaharu Kota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:55
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/18; G10K9/22; G01; G01S; G01S7/00; G01S7/52; G01S7/521; G01S7/52004; G01S7/52006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
An ultrasonic sensor, comprising: a casing; a piezoelectric vibration element housed in said casing; a temperature compensation capacitor housed in said casing; a pair of electrodes provided on one common surface of said temperature compensation capacitor; a pair of first lead wires electrically connecting said piezoelectric element and said temperature compensation capacitor via said pair of electrodes, respectively; and a pair of second lead wires connected to said temperature compensation capacitor via said pair of electrodes respectively and extending from an interior of the casing to an exterior of the casing.
Claim 2
Dependent Claim
91 words
An ultrasonic sensor, comprising: a casing; a piezoelectric vibration element housed in said casing; a temperature compensation capacitor housed in said casing; a pair of electrodes provided on one common surface of said temperature compensation capacitor; a pair of first lead wires electrically connecting said piezoelectric element and said temperature compensation capacitor via said pair of electrodes, respectively; and a pair of second lead wires connected to said temperature compensation capacitor via said pair of electrodes respectively and extending from an interior of the casing to an exterior of the casing.
Claim 3
Dependent Claim
43 words
The sensor according to claim 1, wherein the temperature compensation capacitor has a width that is less than about λ/4 measured in a propagation direction of ultrasonic wave, where λ is a wavelength of an ultrasonic wave generated by said piezoelectric vibration element.
Claim 4
Dependent Claim
45 words
The sensor according to claim 2, wherein a distance between a portion of the temperature compensation capacitor which is spaced farthest from the piezoelectric vibration element and said piezoelectric vibration element is less than about λ/4 measured in the propagation direction of the ultrasonic wave.
Claim 5
Dependent Claim
58 words
The sensor according to claim 1, wherein a distance between a portion of the temperature compensation capacitor spaced farthest from the piezoelectric vibration element and said piezoelectric vibration element is less than about λ/4 measured in a propagation direction of an ultrasonic wave, where λ is a wavelength of an ultrasonic wave generated by said piezoelectric vibration element.
Claim 6
Dependent Claim
16 words
The sensor according to claim 1, wherein said temperature compensation capacitor has a substantially rectangular shape.
Claim 7
Dependent Claim
16 words
The sensor according to claim 1, wherein said temperature compensation capacitor has a substantially circular shape.
Claim 8
Dependent Claim
106 words
An ultrasonic sensor, comprising: a casing; a piezoelectric vibration element housed in said casing; a temperature compensation capacitor housed in said casing; a pair of electrodes provided disposed on said temperature compensation capacitor; a pair of first lead wires electrically connecting said piezoelectric element and said temperature compensation capacitor via said pair of electrodes, respectively, said first pair of lead wires being connected to a single common surface of said temperature compensation capacitor; and a pair of second lead wires connected to said temperature compensation capacitor via said pair of electrodes respectively and extending from an interior of the casing to an exterior of the casing.
Claim 9
Dependent Claim
106 words
An ultrasonic sensor, comprising: a casing; a piezoelectric vibration element housed in said casing; a temperature compensation capacitor housed in said casing; a pair of electrodes provided disposed on said temperature compensation capacitor; a pair of first lead wires electrically connecting said piezoelectric element and said temperature compensation capacitor via said pair of electrodes, respectively, said first pair of lead wires being connected to a single common surface of said temperature compensation capacitor; and a pair of second lead wires connected to said temperature compensation capacitor via said pair of electrodes respectively and extending from an interior of the casing to an exterior of the casing.
Claim 10
Dependent Claim
25 words
The sensor according to claim 7, wherein the second pair of lead wires is connected to a single common surface of said temperature compensation capacitor.
Claim 11
Dependent Claim
29 words
The sensor according to claim 7, wherein the pair of electrodes provided on said temperature compensation capacitor are located on a single common surface of said temperature compensation capacitor.
Claim 12
Dependent Claim
43 words
The sensor according to claim 7, wherein the temperature compensation capacitor has a width that is less than about λ/4 measured in a propagation direction of ultrasonic wave, where λ is a wavelength of an ultrasonic wave generated by said piezoelectric vibration element.
Claim 13
Dependent Claim
45 words
The sensor according to claim 10, wherein a distance between a portion of the temperature compensation capacitor which is spaced farthest from the piezoelectric vibration element and said piezoelectric vibration element is less than about λ/4 measured in the propagation direction of the ultrasonic wave.
Claim 14
Dependent Claim
58 words
The sensor according to claim 7, wherein a distance between a portion of the temperature compensation capacitor spaced farthest from the piezoelectric vibration element and said piezoelectric vibration element is less than about λ/4 measured in a propagation direction of an ultrasonic wave, where λ is a wavelength of an ultrasonic wave generated by said piezoelectric vibration element.
Claim 15
Dependent Claim
16 words
The sensor according to claim 7, wherein said temperature compensation capacitor has a substantially rectangular shape.
Claim 16
Dependent Claim
16 words
The sensor according to claim 7, wherein said temperature compensation capacitor has a substantially circular shape.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-22 | 2003-05-24 | 2003-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-22 | 2007-05-24 | 2007-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-22 | 2011-05-24 | 2011-11-23 | $7700.00 | Window Closed / Lapsed |