Dr. Chang graduated from the University of North Carolina School of Medicine at Chapel Hill in 1991. He works in Carrollton, TX and specializes in Internal Medicine.
Us Patents
In-Situ Laser Annealing Of Te Growth Defects In Cdznte (Ilast-Czt)
Sushant Sonde - Westmont IL, US Yong Chang - Naperville IL, US Silviu Velicu - Naperville IL, US
International Classification:
C30B 19/10 C30B 29/46
Abstract:
In a crystal growth furnace having an array of vertically arranged heaters to provide controlled heating zones within a chamber, and a crucible for holding crystal material, wherein the crystal is grown vertically through the heating zones, the improvement includes a laser mounted outside the chamber which radiates a beam of energy to locally melt precipitates and inclusions. The furnace includes a mechanism to position the laser vertically to, at or near the interface between the formed crystal and crystal melt material above the formed crystal. The crystal material can be CdZnTe.