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Title: Contoured inner after-heater shield for reducing stress in growing crystalline bodies

Abstract

An apparatus for growing hollow crystalline bodies by the EFG process, comprising an EFG die having a top surface shaped for growing a hollow crystalline body having a cross-sectional configuration in the shape of a polygon having n faces, and a radiation shield adjacent to and surrounded by the top end surface of the die, characterized in that the shield has an inner edge defining a similar polygon with n sides, and the inner edge of the shield is notched so that the spacing between the n faces and the n sides is greatest between the central portions of the n faces and the n sides, whereby the greater spacing at the central portions helps to reduce lateral temperature gradients in the crystalline body that is grown by use of the die.

Inventors:
 [1]
  1. Wellesley, MA
Issue Date:
OSTI Identifier:
870608
Patent Number(s):
5558712
Application Number:
08/334,753
Assignee:
ASE Americas, Inc. (Billerica, MA)
DOE Contract Number:  
NREL-ZM-2-11040-3
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
contoured; inner; after-heater; shield; reducing; stress; growing; crystalline; bodies; apparatus; hollow; efg; process; comprising; die; top; surface; shaped; cross-sectional; configuration; shape; polygon; radiation; adjacent; surrounded; characterized; edge; defining; similar; notched; spacing; central; portions; whereby; helps; reduce; lateral; temperature; gradients; grown; central portions; radiation shield; top surface; temperature gradient; central portion; cross-sectional configuration; temperature gradients; surface shaped; inner edge; crystalline bodies; growing crystalline; hollow crystalline; growing crystal; surface shape; efg process; /117/

Citation Formats

Kalejs, Juris P. Contoured inner after-heater shield for reducing stress in growing crystalline bodies. United States: N. p., 1996. Web.
Kalejs, Juris P. Contoured inner after-heater shield for reducing stress in growing crystalline bodies. United States.
Kalejs, Juris P. Tue . "Contoured inner after-heater shield for reducing stress in growing crystalline bodies". United States. https://www.osti.gov/servlets/purl/870608.
@article{osti_870608,
title = {Contoured inner after-heater shield for reducing stress in growing crystalline bodies},
author = {Kalejs, Juris P},
abstractNote = {An apparatus for growing hollow crystalline bodies by the EFG process, comprising an EFG die having a top surface shaped for growing a hollow crystalline body having a cross-sectional configuration in the shape of a polygon having n faces, and a radiation shield adjacent to and surrounded by the top end surface of the die, characterized in that the shield has an inner edge defining a similar polygon with n sides, and the inner edge of the shield is notched so that the spacing between the n faces and the n sides is greatest between the central portions of the n faces and the n sides, whereby the greater spacing at the central portions helps to reduce lateral temperature gradients in the crystalline body that is grown by use of the die.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {9}
}

Patent:

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