Laser deposition of cubic cadmium sulfide films

Details Laser deposition of cubic cadmium sulfide films Laser deposition of cubic cadmium sulfide films

1992-10-23

1994-04-19

Chaudhuri, Olik

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG80, 427586, 148DIG64, C30B 3000

Patent

active

053042816

ABSTRACT:
A process for preparing a film consisting of at least about 90 weight percent of cubic cadmium sulfide is disclosed.
In one step of this process, a cadmium sulfide target with a density of at least about 3.8 grams per cubic centimeter is provided. In a separate step, there is provided a heated substrate which is at a temperature of from about 50 to about 300 degrees Centigrade. The heated substrate is disposed at a distance of from about 2 to about 10 centimeters from the target.
Both the heated substrate and the target are subjected to a pressure of from about 10.sup.-4 to about 10.sup.-9 Torr. Thereafter, the cadmium sulfide target is contacted with a laser beam with a wavelength of from about 100 nanometers to about 30 microns, an energy of at least about 1.0 watt, and a beam width of less than about 5 millimeters.

REFERENCES:
patent: 4059461 (1977-11-01), Fan et al.
"Effect of laser-irradiation on structural and electrical properties of CdS thin films"; Dawar et al.; Journal of Applied Physics; 67(10), pp. 6214-6219 (May 1990).
"Raman investigations of the surface modes of the crystallites in CdS thin films grown by pulsed laser and thermal evaporation", Chuu et al. ; Journal of Applied Physics; 69(12); pp. 8402-8404 (Jun. 1991).

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