The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1987
Filed:
May. 20, 1986
Applicant:
Inventor:
Wolfgang Keller, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ; C30B / ;
U.S. Cl.
CPC ...
156605 ; 156620 ; 156D / ; 156D / ; 118900 ; 422247 ; 422250 ;
Abstract
Semiconductor rods are doped in a crucible-free, float-zone enclosure, by the introduction of dopant pellets into the float-zone. The dopant pellets are located in a hopper (7), mounted on the inside of the float-zone enclosure. The introduction of individual dopant pellets is controlled, through an actuating device (12), from the outside of the enclosure.