Patent US4617707A successfully refreshed from Google Patents.
US4617707A
Expired / Lapsed
US
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Method for the manufacture of an ultrasonics antenna array
Assignee: Siemens AG
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Filing: 1985-09-09
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Granted: 1986-10-21
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Expires: 2005-09-09
Abstract
Abstract A method for the manufacture of a linear or annular ultrasonics antenna array for the megahertz range, which consists in providing a laminate of alternating layers of unsintered ceramic and spacing layers, the spacing layers being composed of a filler material which is heat fugitive at the sintering temperature of the ceramic, the spacing material also including refractory grains distributed therein of a size which corresponds to the spacing desired between the ceramic layers, sintering the laminate to thereby liberate the filler material and leave voids between the refractory grains, impregnating the resulting laminate with a polymerizable resin to bond the sintered ceramic layers together, and separating the resulting laminate into individual transducer elements.
Inventors
- 👤 Jutta Mohaupt
- 👤 Karl Lubitz
- 👤 Manfred Schnoeller
- 👤 Wolfram Wersing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622; B32; B32B; B32B38/00; B32B38/0032; H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/092; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A method for the manufacture of an ultrasonic antenna array composed of a juxtaposed arrangement of piezoceramic transducer elements comprising: providing a laminate of alternating layers of unsintered ceramic and spacing layers, said spacing layers being composed of a filler material which is heat fugitive at the sintering temperature of said ceramic, said spacing material also including refractory grains distributed therein of a size which corresponds to the spacing desired between the ceramic layers, sintering said laminate to thereby liberate said filler material and leave voids between said refractory grains, impregnating the resulting laminate with a polymerizable resin to bond the sintered ceramic layers together, and separating the resulting laminate into individual transducer elements.
Claim 2
Independent Claim
114 words
A method for the manufacture of an ultrasonic antenna array composed of a juxtaposed arrangement of piezoceramic transducer elements comprising: providing a laminate of alternating layers of unsintered ceramic and spacing layers, said spacing layers being composed of a filler material which is heat fugitive at the sintering temperature of said ceramic, said spacing material also including refractory grains distributed therein of a size which corresponds to the spacing desired between the ceramic layers, sintering said laminate to thereby liberate said filler material and leave voids between said refractory grains, impregnating the resulting laminate with a polymerizable resin to bond the sintered ceramic layers together, and separating the resulting laminate into individual transducer elements.
Claim 3
Dependent Claim
18 words
A method according to claim 1 which includes the step of: applying electrodes to said individual transducer elements.
Claim 4
Dependent Claim
18 words
A method according to claim 1 wherein said unsintered layers of ceramic are in the form of foils.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein said laminate is in the form of a wound coil.
Claim 6
Dependent Claim
27 words
A method according to claim 3 wherein said foils are coated with the spacing material before the foils and said spacing materials are formed into a laminate.
Claim 7
Dependent Claim
23 words
A method according to claim 1 wherein said refractory grains are composed of zirconium oxide, aluminum oxide, or magnesium oxide, or mixtures thereof.
Claim 8
Dependent Claim
35 words
A method according to claim 1 in which said polymerizable resin includes an expansible agent which expands at a temperature substantially above the polymerization temperature of said polymerizable resin but below the decomposition temperature thereof.
Claim 9
Dependent Claim
15 words
A method according to claim 1 wherein said individual transducer elements are secured to adapters.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |