Radiation detection system using solid-state detector devices
First Claim
1. A method of fabricating a neutron detection device, comprising:
- pulverizing neutron reactive material to provide granules that have a high packing density when filling elongated tube cavities in an active region of a neutron detection semiconductor device, wherein a center to center distance between each elongated tube is between 5 and 20 microns;
bringing to a common electric potentialthe pulverized neutron reactive material, anda semiconductor wafer including elongated tube cavities extending from respective openings in a surface of an active region of a neutron detection semiconductor device being fabricated on the semiconductor wafer and continuing almost through, but not totally through, the active region, wherein the active region exhibits an internal electric field causing free charges to separate and drift across the active region; and
while maintaining the pulverized neutron reactive material and the semiconductor wafer at the common electric potential, filling the elongated tube cavities to a high packing density with the pulverized neutron reactive material.
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Accused Products
Abstract
A neutron detection device (100) includes a semiconductor substrate including a gallium arsenide substrate region (102) having a back surface, and a high purity gallium arsenide active region (104) having a front surface. A back contact layer (118) is disposed on the back surface for providing a first voltage potential at the back surface. A plurality of elongated tube cavities extend from a plurality of respective openings in the front surface into the high purity gallium arsenide active region (104) and almost through, but not totally through, the high purity gallium arsenide active region (104). A front contact layer is disposed on the front surface for providing a second voltage potential at the front surface. Neutron reactive material, e.g., pulverized Boron-10 powder, fills the plurality of elongated tube cavities to a high packing density. A radiation detection system and a method of fabricating the neutron detection device are also disclosed.
32 Citations
5 Claims
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1. A method of fabricating a neutron detection device, comprising:
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pulverizing neutron reactive material to provide granules that have a high packing density when filling elongated tube cavities in an active region of a neutron detection semiconductor device, wherein a center to center distance between each elongated tube is between 5 and 20 microns; bringing to a common electric potential the pulverized neutron reactive material, and a semiconductor wafer including elongated tube cavities extending from respective openings in a surface of an active region of a neutron detection semiconductor device being fabricated on the semiconductor wafer and continuing almost through, but not totally through, the active region, wherein the active region exhibits an internal electric field causing free charges to separate and drift across the active region; and while maintaining the pulverized neutron reactive material and the semiconductor wafer at the common electric potential, filling the elongated tube cavities to a high packing density with the pulverized neutron reactive material. - View Dependent Claims (2, 3, 4, 5)
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Specification