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):
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:
Subject Categories:
- Manufacturing and Industrial Engineering and Control of Production Systems