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公开(公告)号：US3631290A
公开(公告)日：1971-12-28
申请号：US3631290D
申请日：1970-08-17
Applicant: IBM
Inventor： LOEFFLER KARL H
Abstract: A thermionic cathode comprising a lanthanum hexaboride (LaB6) emitter and an emission current-intercepting plate made of rhenium containing an aperture disposed adjacent the emitter. The separation between the emitter and plate is set as small as possible without physical contact between them, typically 0.1 mm. The beam emitted through the aperture has high brightness and low energy spread. To prevent corrosion of the emitter it is housed in a cavity which is exposed to the vacuum of the apparatus only through the aperture.
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公开(公告)号：US3454821A
公开(公告)日：1969-07-08
申请号：US3454821D
申请日：1967-11-09
Applicant: IBM
Inventor： LOEFFLER KARL H
IPC: B04B5/00 , B04B11/00 , G11C13/04 , H01J37/147 , H01J29/70
CPC classification number: G11C13/04 , B04B5/00 , B04B11/00 , H01J37/147
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公开(公告)号：US3480817A
公开(公告)日：1969-11-25
申请号：US3480817D
申请日：1967-06-30
Applicant: IBM
Inventor： LOEFFLER KARL H
IPC: H01J29/46
CPC classification number: H01J29/46
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4.发明授权Electron beam column with demountable flux-generating assembly and beam-forming elements 失效具有可拆卸通量发生组件和波束形成元件的电子束柱
公开(公告)号：US3345529A
公开(公告)日：1967-10-03
申请号：US57573166
申请日：1966-08-29
Applicant: IBM
Inventor： LOEFFLER KARL H , SALBU ERIK O J
IPC: G11B7/09 , G11C13/04 , H01J29/52 , H01J29/82 , H01J37/04 , H01J37/09 , H01J37/21 , H01J37/244 , H01J37/304
CPC classification number: H01J29/52 , G11B7/0917 , G11C13/04 , G11C13/048 , H01J29/82 , H01J37/04 , H01J37/09 , H01J37/21 , H01J37/244 , H01J37/304 , H01J2237/24507
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