Charged particle detection device and charged particle radiation apparatus
First Claim
1. A charge particle detection device comprising:
- a semiconductor substrate;
an insulating film formed on said semiconductor substrate;
an electrode formed on said insulating film;
means for forming a potential well, which is constituted by a depletion layer in a first region of said semiconductor substrate, near a surface of said semiconductor substrate under said electrode;
means for sweeping, into a second region of said semiconductor substrate, charges which are generated in said semiconductor substrate by charged particles incident through said electrode and that are stored in said potential well; and
means for detecting electrical signals generated by the charged particles swept into said second region of said semiconductor substrate.
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Accused Products
Abstract
According to this invention, there is provided a charged particle detection device including a semiconductor substrate, an insulating film formed on the semiconductor substrate, an electrode formed on the insulating film, a member for forming a potential well, which is constituted by a depletion layer, near a surface of the semiconductor substrate under the electrode, a member for sweeping, into the semiconductor substrate, charges which are generated in the semiconductor substrate by charged particles incident from the electrode and are stored in the potential well, and a member for detecting signal charges generated by the charged particles swept into the semiconductor substrate.
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Citations
22 Claims
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1. A charge particle detection device comprising:
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a semiconductor substrate; an insulating film formed on said semiconductor substrate; an electrode formed on said insulating film; means for forming a potential well, which is constituted by a depletion layer in a first region of said semiconductor substrate, near a surface of said semiconductor substrate under said electrode; means for sweeping, into a second region of said semiconductor substrate, charges which are generated in said semiconductor substrate by charged particles incident through said electrode and that are stored in said potential well; and means for detecting electrical signals generated by the charged particles swept into said second region of said semiconductor substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A charged particle detection device comprising:
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a semiconductor substrate having a hole for causing charged particles to pass therethrough; a first insulating film formed on said semiconductor substrate; an electrode formed on said first insulating film; means for forming a potential well, which is constituted by a depletion layer in a first region of said semiconductor substrate, near a surface of said semiconductor substrate under said electrode; means for sweeping, into a second region of said semiconductor substrate, charges which are generated in said semiconductor substrate by charged particles incident through said electrode and that are stored in said potential well; means for detecting electrical signals generated by the charged particles swept into said second region of said semiconductor substrate; and a conductive thin film formed on an inner wall of said hole through a second insulating film and electrically connected to said electrode. - View Dependent Claims (8, 9, 10)
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11. A charged particle radiation apparatus comprising:
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a radiation device for radiating charged particles onto a sample; and a charged particle detection unit for detecting charged particles reflected by said sample, said charged particle detection comprising; a semiconductor substrate, an insulating film formed on said semiconductor substrate, an electrode formed on said insulating film, means for forming a potential well, which is constituted by a depletion layer in a first region of said semiconductor substrate, near a surface of said semiconductor substrate under said electrode, means for sweeping, into a second region of said semiconductor substrate, charges which are generated in said semiconductor substrate by charged particles incident from said electrode and that are stored in said potential well, and means for detecting electrical signals generated by the charged particles swept into said second region of said semiconductor substrate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A charged particle detection device comprising:
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a semiconductor substrate; an insulating film formed on said semiconductor substrate; an electrode formed on said insulating film; means for forming a potential well, which is constituted by a depletion layer in a first region of said semiconductor substrate, near a surface of said semiconductor substrate under said electrode, by applying a first voltage to said electrode; means for sweeping, into a second region of said semiconductor substrate, charges which are generated in said semiconductor substrate by electrons incident from said electrode and that are stored in said potential well, by applying a second voltage that is lower than said first voltage to said electrode; and means for detecting electrical signals generated by the electrons swept into said second region of said semiconductor substrate. - View Dependent Claims (20, 21, 22)
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Specification