Accession Number:

AD0770891

Title:

Method for Automatic Control of the Process of Zone Melting without a Crucible,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Degtyarik,N. V.
• Kiselev,A. M.
• Lezhebokov,I. I.
• Naroichik,S. S.
• Nikolaev,A. A.

Report Date:

1973-11-09

Pagination or Media Count:

7.0

Abstract:

The invention pertains to a process of obtaining semiconductor materials. The purpose of the invention is to increase the accuracy of controlling the process of zone melting without a crucible. This is achieved by projecting the profile of the zone located directly at the crystallization front onto a photocell photodetector which controls the ingot diameter via a servosystem beyond the crystallization front.

Descriptors:

• *Semiconductors
• *Zone melting
• Patents
• Automatic
• Control
• Detectors
• Translations
• USSR

Subject Categories:

• Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE