US Patent 7744705 Group I-III-VI quaternary or higher alloy semiconductor films

Patent 7744705 was granted and assigned to University of Johannesburg on June, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

University of Johannesburg

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

77447050

Patent Inventor Names

Vivian Alberts0

Date of Patent

June 29, 2010

Patent Application Number

105682290

Date Filed

August 13, 2004

Patent Primary Examiner

‌

Sikyin Ip

Patent abstract

This invention relates to group IB-IIIA. VIA quaternary or higher alloys. More particularly, this invention relations to group IB-IIIA-VIA quaternary or pentenary alloys which are suitable for use as semiconductor films. More specifically, the invention relates to quaternary or pentenary alloys which are substantially homogeneous and are characterized by an x-ray diffraction pattern (XRD) having a main [112] peak at a 2θ angle (2θ(112)) of from 26° to 28° for Cu radiation at 40 kV, wherein a glancing incidence x-ray diffraction pattern (GIXRD) for a glancing angle of from 0.2° to 10° reflects an absolute shift in the 2θ(112) angle of less than 0.06°.