A finite-element analysis of thermoelastic stresses is performed using the thermal fields predicted from a companion study [K. Edwards and J.J. Derby, J. Crystal Growth 179 (1997) 120] of the horizontal Bridgman growth of cadmium telluride and cadmium zinc telluride. Of special interest is the exploration of the shelf growth morphology and its effect on crystalline quality. The results of this study present a compelling argument for the benefits of shelf growth. Not only does the highly deflected interface characteristic of shelf growth act to shield the growing crystal from adverse crucible sticking interactions, the thermal conditions enhancing shelf growth, namely low thermal gradients and heating from below, act to minimize thermal stresses and further mitigate deleterious crucible interactions.
Bibliographical noteFunding Information:
This work was supported in part by Johnson Matthey Electronics, Inc., under contract MDA972-91-C-0046, IR Materials Producibility, from the Advanced Research Projects Agency, Microelectronics Technology Office, and by the National Science Foundation under grant number DMR-9058386. Computational resources were provided by the University of Minnesota Supercomputer Institute and the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement DAAH04-95-2-0003/contract DAAH04-95-C-0008, the content of which does not necessarily reflect the position or policy of the government, and no official endorsement should be inferred.