Title:
【発明の名称】X線イメージ管及びその製造方法
Document Type and Number:
Japanese Patent JP2996711
Kind Code:
B2
Abstract:
An X-ray imaging tube which comprises a vacuum envelope (11), an input screen (12) comprising a substrate (16) located in the input end of the envelope (11), an input phosphor layer (17) formed on the substrate (11) and comprising a number of columnar phosphor crystals (17a), and a photoelectric layer (18) formed directly or indirectly on the input phosphor layer (17), an anode (13) and an output screen (14) located in the output end of the envelope, and a beam-converging electrode (15) located in the envelope (11) and extending along the inner surface of the envelope (11). The tube further comprising optically opaque layers (21) which are formed in each columnar crystal (17a) and extending from the surface thereof. A method of manufacturing an X-ray imaging tube, disclosed herein, comprises the steps of vapor-depositing a predetermined phosphor on a substrate (16), thereby forming on the substrate (16) an input phosphor layer (17) consisting of columnar crystals (17a), vapor-depositing a predetermined material, thereby forming an optically opaque layer (21) on the tip of each columnar crystal (17a), sputtering the optically opaque layer (21), thereby removing a part of the optically opaque layer (21) formed on the tip of the columnar crystal (17a), vapor-depositing said predetermined phosphor, and, if necessary, repeating these steps, thereby forming a plurality of optically opaque layers (21) in each columnar crystal (17a), which extend from circumferential surface of the columnar crystal (17a).
Inventors:
Kubo Hiroshi
Application Number:
JP27767690A
Publication Date:
January 11, 2000
Filing Date:
October 18, 1990
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H01J9/233; G21K4/00; H01J9/12; H01J29/38; H01J31/50; (IPC1-7): H01J31/50; H01J9/22
Domestic Patent References:
| JP6489131A | ||||
| JP227641A |
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)