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

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.

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE