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Hollister Clothing,Cloth0717,vapor deposition with substrate rotation The

Hollister Clothing,Cloth0717,vapor deposition with substrate rotation The

A semi-automated student advising system has been developed using QUATTRO spreadsheet software. The system consists of five inter-related spreadsheet templates; MAIN, RECORD, PROGRESS, AID, and SCHED. The MAIN template provides the listing of required courses. Hollister Clothing For Cheap Student records are kept in the RECORD template. The student progress chart is displayed by the PROGRESS template. The AID template recommends to the advisor what courses the student can take. The SCHED template provides a worksheet for trial schedules, so that time conflicts can be avoided. The system performs tedious bookkeeping and analyzing tasks, so the advisor can spend more time with the student. Extremely uniform epitaxial growth of GaAs and GaAlAs on three-inch wafers was achieved by low pressure metalorganic chemical vapor deposition with substrate rotation. The variations in thickness and doping of GaAs are, respectively, ±2.6% and ±3.5% on the whole wafer except the edge. For GaAlAs, the Al composition changes by less than ±1.0% and the intensity of photoluminescence (PL) is less than ±5%. The growth rate study on a three-inch substrate without rotation shows that the variations of growth rate along the directions parallel and perpendicular to Hollister Clothing the gas flow compensate each other, and hence the uniform epitaxial growth is realized.
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