Patent search ap:("HALDOR FREDERIK AXEL FRYDENLUN") AND inv:"KNUDSEN POUL E" Page 1

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发明授权
Apparatus for control of heat radiation in zone melting 失效
Title translation: 控制区域熔融热辐射的装置

公开(公告)号：US3644097A

公开(公告)日：1972-02-22

申请号：US3644097D

申请日：1968-11-13

Applicant: HALDOR FREDERIK AXEL FRYDENLUN

Inventor： KNUDSEN POUL E

IPC: C30B13/28 , B01J17/10

CPC classification number: C30B13/28 , Y10T117/1088

Abstract: Control of heat radiation from the ''''critical zone'''' adjacent the molten material in a floating-zone purification of a semiconductor monocrystal to achieve a low level of dislocations.

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