US5381385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical interconnect for multilayer transducer elements of a two-dimensional transducer array
Assignee: HP Inc
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Filing: 1993-08-04
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Granted: 1995-01-10
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Expires: 2013-08-04
Abstract
Abstract A multilayer two-dimensional array of ultrasonic transducer elements includes four via segments at the four corners of each transducer element. A first pair of diagonally opposed via segments provide signals to signal electrode layers of each transducer element. A second pair of diagonally opposed via segments interconnect ground electrode layers. Thus, a redundant interconnection scheme is achieved. If the transducer elements include piezoelectric layers having a square cross section parallel to a transducer radiating surface, four-fold symmetry is maintained, despite the formation of the four via segments. Also disclosed is a method of forming a two-dimensional array.
Inventors
- 👤 Michael Greenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622; B06B1/064
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
An ultrasonic transducer element comprising: a stack of piezoelectric layers, said stack having a first pair of sidewalls which extend along intersecting planes that are perpendicular to said piezoelectric layers; electrode means for impressing an excitation signal across said piezoelectric layers; and an electrically conductive via segment disposed at the intersection of said planes, said via segment thereby forming a corner of said stack, said via segment being in electrical communication with said electrode means.
Claim 2
Dependent Claim
75 words
An ultrasonic transducer element comprising: a stack of piezoelectric layers, said stack having a first pair of sidewalls which extend along intersecting planes that are perpendicular to said piezoelectric layers; electrode means for impressing an excitation signal across said piezoelectric layers; and an electrically conductive via segment disposed at the intersection of said planes, said via segment thereby forming a corner of said stack, said via segment being in electrical communication with said electrode means.
Claim 3
Dependent Claim
33 words
The ultrasonic transducer element of claim 1 wherein said electrode means includes electrically conductive layers disposed between said piezoelectric layers, said via segment being connected to selected ones of said electrically conductive layers.
Claim 4
Dependent Claim
58 words
The ultrasonic transducer element of claim 1 wherein said stack includes a second pair of sidewalls which extend along intersecting planes, said transducer element further comprising an electrically conductive second via segment at the intersection of said planes along which said second pair of sidewalls extend, said second via segment being in electrical communication with said electrode means.
Claim 5
Dependent Claim
24 words
The ultrasonic transducer element of claim 1 wherein said via segment is wedge-shaped in a cross section that is parallel to said piezoelectric layers.
Claim 6
Dependent Claim
37 words
The ultrasonic transducer element of claim 1 wherein said stack of piezoelectric layers is a parallelepiped, and wherein said via segment is one of four via segments which extend in parallel relationship along corners of said parallelepiped.
Claim 7
Dependent Claim
57 words
The ultrasonic transducer element of claim 5 wherein said electrode means includes conductive layers between adjacent piezoelectric layers of said stack, said conductive layers including signal layers and ground layers, two of said four via segments being electrically connected to said ground layers and two of said four via segments being electrically connected to said signal layers.
Claim 8
Dependent Claim
44 words
The ultrasonic transducer element of claim 1 wherein said stack is one stack in a two-dimensional array of stacks of piezoelectric layers, thereby forming a two-dimensional array of transducer elements, each stack having at least one via segment at a corner of said stack.
Claim 9
Dependent Claim
51 words
The ultrasonic transducer element of claim 7 wherein each stack has four corner via segments and each corner via segment has two linear walls and an arcuate wall, With said two linear walls having intersecting first ends and having second ends that are connected to opposite ends of said arcuate wall.
Claim 10
Dependent Claim
92 words
A transducer device comprising: a two-dimensional array of transducer elements, each transducer element having a plurality of piezoelectric layers and a plurality of electrode layers at opposed faces of said piezoelectric layers to impress an excitation signal across said piezoelectric layers, said transducer elements having four sidewalls extending to corner regions; and four via segments disposed along said corner regions, including a first via segment electrically coupled to a first set of said electrode layers and further including a second via segment electrically coupled to a second set of said electrode layers.
Claim 11
Dependent Claim
92 words
A transducer device comprising: a two-dimensional array of transducer elements, each transducer element having a plurality of piezoelectric layers and a plurality of electrode layers at opposed faces of said piezoelectric layers to impress an excitation signal across said piezoelectric layers, said transducer elements having four sidewalls extending to corner regions; and four via segments disposed along said corner regions, including a first via segment electrically coupled to a first set of said electrode layers and further including a second via segment electrically coupled to a second set of said electrode layers.
Claim 12
Dependent Claim
39 words
The device of claim 9 wherein said four via segments include a third via segment electrically coupled to said first set of electrode layers and include a fourth via segment electrically coupled to said second set of electrode layers.
Claim 13
Dependent Claim
28 words
The device of claim 9 wherein each of said four via segments has two linear exterior walls and an arcuate interior wall connected to said linear exterior walls.
Claim 14
Dependent Claim
17 words
The device of claim 9 wherein each of said sidewalls of said transducer elements are substantially identical.
Claim 15
Dependent Claim
24 words
The device of claim 9 wherein said set of electrode layers is signal layers and said second set of electrode layers is ground layers.
Claim 16
Dependent Claim
13 words
The device of claim 9 wherein said transducer elements are ultrasonic transducer elements.
References Cited (Backward Citations)
US4638468A
Cited
US4633122A
Cited
US4734044A
Cited
US4881212A
Cited
US4825115A
Cited
US5163436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |