US4547670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-dimensional radiation detecting apparatus
Assignee: Toshiba Corp
•
Filing: 1983-04-19
•
Granted: 1985-10-15
•
Expires: 2003-04-19
Abstract
Abstract A two-dimensional X-ray detecting apparatus is comprised of an amorphous silicon layer for trapping electrons in a pattern corresponding to an intensity distribution when it is receiving X-rays, and a scanning device for scanning the surface of the amorphous silicon layer with a laser beam to take out electrons trapped in the silicon layer.
Inventors
- 👤 Hiroshi Sugimoto
- 👤 Yujiro Naruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:58
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2006; G01T1/24; G01T1/246
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A two-dimensional X-ray detecting apparatus comprising: a substrate; two-dimensional radiation detecting means containing an electron trapping layer laminated on said substrate and made of material to trap the number of electrons proportional to an amount of radiation in a trap level in a forbidden band when said trapping layer is irradiated, and an electrode layer laminated on said electron trapping layer; biasing means for reverse-biasing said electron trapping layer with respect to a reference potential; and scanning means for scanning said electron trapping layer to take out said trapped electrons from said electron trapping layer into said electrode layer.
Claim 2
Dependent Claim
99 words
A two-dimensional X-ray detecting apparatus comprising: a substrate; two-dimensional radiation detecting means containing an electron trapping layer laminated on said substrate and made of material to trap the number of electrons proportional to an amount of radiation in a trap level in a forbidden band when said trapping layer is irradiated, and an electrode layer laminated on said electron trapping layer; biasing means for reverse-biasing said electron trapping layer with respect to a reference potential; and scanning means for scanning said electron trapping layer to take out said trapped electrons from said electron trapping layer into said electrode layer.
Claim 3
Dependent Claim
57 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said two-dimensional radiation detecting means is further provided with a laminated member containing a scintillator and a biasing electrode layer and layered between said substrate and said electron trapping layer, said scintillator being layered on said substrate and said biasing electrode layer being layered on said scintillator.
Claim 4
Dependent Claim
24 words
A two-dimensional X-ray detecting apparatus according to claim 2, wherein said scintillator is made of CdWO 4 and said substrate is made of plastic.
Claim 5
Dependent Claim
19 words
A two-dimensional X-ray detecting apparatus according to claim 2, wherein said substrate is made of carbon fiber reinforced plastics.
Claim 6
Dependent Claim
28 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said electron trapping layer is selected from one of amorphous Si, amorphous CdTe, amorphous GaAs and amorphous Cds.
Claim 7
Dependent Claim
23 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said electrode layer is made of In 2 O 3 -SnO 2 .
Claim 8
Dependent Claim
70 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said electrode layer is made of In 2 O 3 -SnO 2 layer and said electron trapping layer is a laminated member composed of a first amorphous silicon layer layered on said substrate and containing approximately 5% hydrogen and a second amorphous silicon layer layered on said In 2 O 3 -SnO 2 electrode layer and containing approximately 30% hydrogen.
Claim 9
Dependent Claim
71 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said scanning means includes beam generating a means for generating beam to illuminate the surface of said electron trapping layer, guide means for guiding the beam from said beam generating means onto said trapping layer, and sweeping means for moving said guide means along a predetermined scanning pattern, thereby to scan the surface of said electron trapping layer with said beam.
Claim 10
Dependent Claim
19 words
A two-dimensional X-ray detecting apparatus according to claim 8, wherein said beam generating means is a laser beam generator.
Claim 11
Dependent Claim
33 words
A two-dimensional X-ray detecting apparatus according to claim 9, wherein said laser beam generator is one of a He-Ne laser beam generator, a YAG laser beam generator, and CO 2 laser beam generator.
Claim 12
Dependent Claim
17 words
A two-dimensional X-ray detecting apparatus according to claim 1, wherein said substrate is made of stainless steel.
References Cited (Backward Citations)
US2990473A
Cited
US3859527A
Cited
US3974389A
Cited
US4079255A
Cited
US4258264A
Cited
US4302671A
Cited
US4249106A
Cited
GB2037077A
Cited
JPS5611395A
Cited
US4369369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |