公开(公告)号：US2594851A

公开(公告)日：1952-04-29

申请号：US2042448

申请日：1948-04-12

Applicant: CARL BERTELE HANS

Inventor： CARL BERTELE HANS

IPC: H01J13/06 ,  H01J13/32

CPC classification number: H01J13/06 ,  H01J13/32 ,  H01J2893/0075

公开(公告)号：US2640171A

公开(公告)日：1953-05-26

申请号：US25312251

申请日：1951-10-25

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GERHARD LEWIN ,  GOLDMAN ERNEST A

IPC: H01J13/06 ,  H01J13/12 ,  H01J17/06

CPC classification number: H01J13/12 ,  H01J13/06 ,  H01J17/06 ,  H01J2893/0075 ,  Y10S428/926 ,  Y10T428/12042

公开(公告)号：US2155138A

公开(公告)日：1939-04-18

申请号：US15062537

申请日：1937-06-26

Applicant: PHILIPS NV

Inventor： HENDRIK LEMS

IPC: H01J13/06 ,  H01J13/12

CPC classification number: H01J13/06 ,  H01J13/12 ,  H01J2893/0075

公开(公告)号：US2919367A

公开(公告)日：1959-12-29

申请号：US61686556

申请日：1956-10-18

Applicant: RCA CORP

Inventor： HERNQVIST KARL G

IPC: C01B25/237 ,  H01J13/06 ,  H01J13/48

CPC classification number: H01J13/06 ,  C01B25/237 ,  H01J13/48 ,  H01J2893/0075

公开(公告)号：US2432513A

公开(公告)日：1947-12-16

申请号：US67201146

申请日：1946-05-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： CHARLES DEPEW

IPC: H01J13/06 ,  H01T1/00

CPC classification number: H01T1/00 ,  H01J13/06 ,  H01J2893/0075

公开(公告)号：US2053122A

公开(公告)日：1936-09-01

申请号：US58815032

申请日：1932-01-22

Applicant: GEN ELECTRIC

Inventor： WILKINS WILLIAM A

IPC: H01J13/06 ,  H01J13/26

CPC classification number: H01J13/06 ,  H01J13/26 ,  H01J2893/0075 ,  Y10T403/478

公开(公告)号：US3047380A

公开(公告)日：1962-07-31

申请号：US386560

申请日：1960-01-21

Applicant: PHILIPS CORP

Inventor： JAN BLOEM

IPC: C30B13/00 ,  H01J13/06 ,  H01L21/00

CPC classification number: H01J13/06 ,  C30B13/00 ,  C30B29/08 ,  H01J2893/0075 ,  H01L21/00

Abstract: Germanium is freed from oxygen by adding magnesium, beryllium or titanium and zone refining. Zone refining may be repeated one or more times. 0,1-5 atomic per cent of magnesium based on the molten zone may be employed. As shown a pellet 3 consisting of a 2 to 3 mixture of magnesium and germanium is placed on one end of a bar 2 of germanium in a graphite crucible 1. The crucible is then placed in a quartz tube 4, which is then traversed by an induction heating coil 5 during the passage through the tube of a stream of pure dry hydrogen. After the passage of two molten zones, the end of high magnesium content is cut off and the remainder is treated with an aqueous solution of hydrogen fluoride and nitric acid. A desired amount of a significant impurity may be incorporated in the germanium or a single crystal may be formed during the passage of the second molten zone.

公开(公告)号：US2976451A

公开(公告)日：1961-03-21

申请号：US81887459

申请日：1959-06-08

Applicant: GEN ELECTRIC

Inventor： REILING GILBERT H ,  JENSEN ANDREW O

IPC: H01J13/06 ,  H01J13/50

CPC classification number: H01J13/06 ,  H01J13/50 ,  H01J2893/0075

公开(公告)号：US1776157A

公开(公告)日：1930-09-16

申请号：US17624227

申请日：1927-03-17

Applicant: GEN ELECTRIC

Inventor： CHRISTIAN KRAMER

IPC: H01J13/06 ,  H01J13/22

CPC classification number: H01J13/06 ,  H01J13/22 ,  H01J2893/0075

公开(公告)号：US3538375A

公开(公告)日：1970-11-03

申请号：US3538375D

申请日：1968-04-11

Applicant: HUGHES AIRCRAFT CO

Inventor： ECKHARDT WILFRIED O

IPC: H01J13/06 ,  H01J13/08 ,  H01J1/12

CPC classification number: H01J13/06 ,  H01J13/08 ,  H01J2893/0075