Transmission mode photocathode with multilayer active layer for night vision and method
First Claim
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1. A method of making a photocathode, comprising:
- forming a wafer structure according to the steps of;
growing a first sublayer having a first concentration of a group III-V semiconductor compound, andgrowing a second sublayer having a second concentration of the group III-V semiconductor compound; and
bonding a face plate to the wafer structure.
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Abstract
An improved photocathode and image intensifier tube are disclosed along with a method for making both the tube and photocathode. The disclosed photocathode and image intensifier tube have an active layer comprising two or more sublayers. The first sublayer has a first concentration of a group III-V semiconductor compound while the second sublayer has a second concentration of the group III-V semiconductor compound. The multilayer active layer is coupled to a window layer.
25 Citations
20 Claims
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1. A method of making a photocathode, comprising:
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forming a wafer structure according to the steps of; growing a first sublayer having a first concentration of a group III-V semiconductor compound, and growing a second sublayer having a second concentration of the group III-V semiconductor compound; and bonding a face plate to the wafer structure. - View Dependent Claims (2, 3, 4)
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5. A method for forming a wafer structure for a photocathode, comprising:
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forming an active layer outwardly of a substrate, the active layer comprising a plurality of sublayers, each sublayer having an associated concentration of a group III-V semiconductor compound; and forming a window layer outwardly of the substrate and the active layer. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method of making a photocathode, comprising:
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providing a substrate; forming an active layer outwardly of the substrate, the active layer comprising a plurality of sublayers, each sublayer having an associated concentration of a group III-V semiconductor compound; forming a window layer outwardly of the substrate and the active layer; bonding a face plate to the window layer; and removing the substrate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification