
US Patent No: 4,853,020
Number of patents in Portfolio can not be more than 2000
Method of making a channel type electron multiplier
Stats
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Aug 1, 1989
Issued date -
Jan 25, 1988
filing date -
07/147,068
serial no -
Expired
status
Importance
Abstract
A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core material. The fiber bundles located around the inside edge of the glass tube are replaced by support fibers having both a core and a cladding of a material which is non-etchable under the above-described conditions. The assembly of the tube, bundles and support fibers is heated to fuse the tube, bundles and support fibers together. The etchable core material is then removed and the assembly sliced into wafers. The inner surface of each of the claddings which bound the channel formed after removal of the core material is rendered electron emissive by reduction of the lead oxide by hydrogen gas. Metal films are deposited onto the opposed surfaces of each of the wafers to form contacts.
First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,767,430 Optical fiber-device interconnection and method | 13 | 1985 | |
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| 4,710,216 Method of making flexible optical fiber bundle | 4 | 1985 | |
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| 4,385,092 Macroboule | 14 | 1965 | |
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| 4,682,849 Optical fiber junction and method of making same | 16 | 1986 | |
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| 4,650,509 Fluid lamp fabrication method | 4 | 1985 | |
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| 4,389,089 Flexible fiber optical conduit and method of making | 16 | 1980 | |