Effect of substrate dislocations on the Hg in-diffusion in CdZnTe substrates used for HgCdTe epilayer growth

Kumar, Shiv; Kapoor, A. K.; Nagpal, Anjana; Sharma, Sanjeev; Verma, Deepti; Kumar, Anand; Raman, R.; Pk, Basu

doi:10.1016/j.jcrysgro.2006.09.056

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Although several studies have shown the residual stress of (111) Cd 0 96 Zn 0 04 Te single crystals [10] and dislocation after mechanical polishing and chemical etching [11], these studies have not related to the nanomechanical properties of CdZnTe crystal. Because CdZnTe crystal has the zincblende structure, which shows extremely mechanical anisotropy, while the mechanical anisotropy is especially influential on the orientation-dependent results obtained when machining of CdZnTe wafers, but the effects of mechanical anisotropy on machining of CdZnTe wafers have not been reported.…”

Section: Introductionmentioning

confidence: 98%

Effect of Mechanical Anisotropy on Grinding of CdZnTe Wafers

Li¹,

Kang²,

Gao³

et al. 2010

Materials and Manufacturing Processes

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In this study, nanoindentation and nanoscratching were employed to research on the mechanical anisotropy of CdZnTe (110) and (111) planes, and their effects on the grinding of CdZnTe wafers were studied. The results suggest that the primary slip system is responsible for the anisotropy of hardness and frictional coefficient. It is easy to slip along 110 directions on (110) plane and 112 directions on (111) plane during scratching, hence the frictional coefficient is the lowest compared to that of other directions, and high surface quality could be obtained during grinding along these directions. The problem of embedded abrasives, which is due to the soft nature of CdZnTe crystal, could be solved when using the grinding process instead of the lapping process.

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Section: Introductionmentioning

confidence: 98%

Effect of Mechanical Anisotropy on Grinding of CdZnTe Wafers

Li¹,

Kang²,

Gao³

et al. 2010

Materials and Manufacturing Processes

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“…The machinability and machining damages of CdZnTe crystal are related to the nanomechanical properties, so it is comparatively important to investigate the nanomechanical properties for preparation of high-resolution HgCdTe and CdZnTe detectors. Some studies have shown that there are residual stress and dislocations on (111) Cd 0.96 Zn 0.04 Te single crystals after mechanical polishing and chemical etching [6][7]. However, few studies discuss the nanomechanical properties of CdZnTe crystal.…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical behaviors of (110) and (111) CdZnTe crystals investigated by nanoindentation

Kang

Gao

et al. 2009

Rare Metals

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The nanomechanical behaviors of (110) and (111) CdZnTe crystals were investigated by nanoindentation. It was found that the indenter tip was adhered by the removed materials in scanning testing area although the scanning force on the tested surface was very small (1000 nN), which would affect the testing result of nanoindentation, so the indenter was clean before nanoindentation test. The experimemtal results showed that the hardness and Young's modulus decreased with the increase of indentation loads on the same plane. Because of the anisotropy of the CdZnTe crystal，the average hardness of (110) plane is 35% lower than that of (111) plane, and there are about 30% difference of the hardness along different crystallographic directions on the same plane. The hardness in 0° and 120° testing directions was the same due to the threefold symmetry of a Berkovich indenter. And the anisotropy affected the surface quality during machining of CdZnTe crystal.

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Properties of Cd(Zn)Te Relevant to Use as Substrates

Adachi¹

2010

Mercury Cadmium Telluride

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Effect of substrate dislocations on the Hg in-diffusion in CdZnTe substrates used for HgCdTe epilayer growth

Cited by 6 publications

References 10 publications

Effect of Mechanical Anisotropy on Grinding of CdZnTe Wafers

Effect of Mechanical Anisotropy on Grinding of CdZnTe Wafers

Nanomechanical behaviors of (110) and (111) CdZnTe crystals investigated by nanoindentation

Properties of Cd(Zn)Te Relevant to Use as Substrates

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