Bridgman Growth of CMT

Historically, the first technique used at SELEX Sensors and Airborne Systems Infrared Ltd. was the Bridgman process. Later, the emphasis switched to the accelerated crucible rotation technique (ACRT), a modification of the Bridgman process. Reviews of bulk growth can be found in [2,4]. 

By growing specifically doped crystals we were able to show that most impurity elements are electrically active in accordance with their position in the periodic table [7]. This behavior is linked to stoichiometry at growth, i.e. those elements that substitute on Te lattice sites have to be somehow forced into the correct sites in 

Bridgman crystals contain several major grains and numerous subgrains within each major grain. A Berg-Barrett X-ray topography study of Bridgman material 

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I 77 Useof Forced Mixing via the ACRT in Bridgman Growth of CMT Bridgman... 

Use of Forced Mixing via the Accelerated Crucible Rotation Technique (ACRT) in Bridgman Growth of Cadmium Mercury Telluride (CMT)... 

This chapter is split into 4 sections. The first deals briefly with purification of elemental mercury and tellurium, the second covers bulk growth of CMT by the Bridgman process and the third describes the addition of the accelerated crucible rotation technique (ACRT) to the basic Bridgman process. Finally, a few comments on the devices that have been and continue to be made from this material are given. 

Table 11.1 LSMS impurity survey in Bridgman and ACRT bulk CMT samples (xlO atoms cm , precise to factor of 3, accurate to factor of 2, Intentional Dopant). (Reprinted from Capper, Prog. Cryst. Growth Charact. 28 (1994) 1, copyright (1994) reproduced with permission from Elsevier Science.)...

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