Patent US4053806A successfully refreshed from Google Patents.
US4053806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyroelectric detector comprising nucleating material wettable by aqueous solution of pyroelectric material
Assignee: US Philips Corp
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Filing: 1975-09-02
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Granted: 1977-10-11
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Expires: 1995-09-02
Abstract
Abstract A pyroelectric detector employing a substrate supporting a thin, i.e., 0.5 to 5 μm thick, solid layer of pyroelectric material with an intermediate layer of nucleating material, i.e., a material which is wettable by a solution of the pyroelectric material so that an adherent continuous layer is formed thereon. The pyroelectric layer may be in the form of a mosaic of islands separated by an electrically conductive material covered with an electrically insulating material.
Inventors
- 👤 Andrew Alfred Turnbull
- 👤 Harry Sewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:11
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/233; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/458
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A pyroelectric detector comprising a substrate, supporting a thin, solid layer of pyroelectric material selected from the group comprising TGS and triglycine fluoroberyllate which are partly or wholly deuterated and a layer of nucleating material selected from the group consisting of aluminum, titanium, matt carbon, magnesium fluoride aluminum oxide, and silica and wettable by an aqueous solution of the pyroelectric material and to which the pyroelectric material adheres intermediate the pyroelectric layer and the substrate.
Claim 2
Dependent Claim
75 words
A pyroelectric detector comprising a substrate, supporting a thin, solid layer of pyroelectric material selected from the group comprising TGS and triglycine fluoroberyllate which are partly or wholly deuterated and a layer of nucleating material selected from the group consisting of aluminum, titanium, matt carbon, magnesium fluoride aluminum oxide, and silica and wettable by an aqueous solution of the pyroelectric material and to which the pyroelectric material adheres intermediate the pyroelectric layer and the substrate.
Claim 3
Dependent Claim
23 words
A pyroelectric detector as claimed in claim 1 in which the thickness of the pyroelectric layer is between about 0.5 and 5 μm.
Claim 4
Dependent Claim
45 words
A pyroelectric detector as claimed in claim 2 in which the substrate consists of a synthetic plastic material having a thickness between about 0.05 and 0.3 μm, a low thermal capacity and a low thermal conductance parallel to the surface thereof supporting the pyroelectric material.
Claim 5
Dependent Claim
16 words
A pyroelectric detector as claimed in claim 3 in which the substrate consists of a polyimide.
Claim 6
Dependent Claim
41 words
A pyroelectric detector as claimed in claim 2 in which the substrate has a low thermal capacity and the ratio R 1 of the thickness of the pyroelectric layer to the thickness of the substrate is not substantially less than 10.
Claim 7
Dependent Claim
30 words
A pyroelectric detector as claimed in claim 1 in which the thickness of the nucleating layer intermediate the pyroelectric layer and the substrate is between about 0.01 and 0.05 μm.
Claim 8
Dependent Claim
101 words
A pyroelectric target for a thermal-image camera tube comprising a membrane supporting a first layer of nucleating material selected from the group consisting of aluminum, titanium, matt carbon magnesium fluoride aluminum oxide, and silica and wettable by a solution of a pyroelectric material, an aqueous second layer of solid pyroelectric material adherent on and covering the first layer, said membrane having a low thermal capacity and a low thermal conductance parallel to the surface thereof supporting the pyroelectric material, said second layer having a thickness between about 0.5 and 5 μm and comprising a mosaic of spaced portions of pyroelectric material.
Claim 9
Dependent Claim
101 words
A pyroelectric target for a thermal-image camera tube comprising a membrane supporting a first layer of nucleating material selected from the group consisting of aluminum, titanium, matt carbon magnesium fluoride aluminum oxide, and silica and wettable by a solution of a pyroelectric material, an aqueous second layer of solid pyroelectric material adherent on and covering the first layer, said membrane having a low thermal capacity and a low thermal conductance parallel to the surface thereof supporting the pyroelectric material, said second layer having a thickness between about 0.5 and 5 μm and comprising a mosaic of spaced portions of pyroelectric material.
Claim 10
Dependent Claim
39 words
A pyroelectric detector for a thermal-imaging tube as claimed in claim 7 in which the ratio R 1 of the thickness of the layer of pyroelectric material to the thickness of the membrane is not substantially less than 10.
Claim 11
Dependent Claim
58 words
A pyroelectric detector for a thermal-imaging tube as claimed in claim 7 in which the membrane consists of electrically insulating material and supports a substantially continuous layer of electrically conductive material intermediate the membrane and the pyroelectric material, the portions of the electrically conductive material between adjacent portions of pyroelectric material being covered by an electrically insulating material.
Claim 12
Dependent Claim
55 words
A pyroelectric detector for a thermal-imaging tube as claimed in claim 7 in which the mosaic comprises a regular array of substantially uniform portions of pyroelectric material and the ratio R 2 between a width of each portion and the gap between adjacent portions is not substantially less than 5 or substantially greater than 12.
Claim 13
Dependent Claim
80 words
A pyroelectric target for a thermal-imaging tube as claimed in claim 7 in which the mosaic comprises a regular array of substantially uniform portions of pyroelectric material in which the ratio R 2 /R 1 is less than 0.5, R 1 being the ratio of the thickness of the layer of pyroelectric material to the thickness of the membrane and R 2 being the ratio between the width of each portion and the gap between adjacent portions of the mosaic.
Claim 14
Dependent Claim
22 words
A pyroelectric detector for a thermal-imaging tube as claimed in claim 6 wherein each portion has a width between about 20-30 μm.
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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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |