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Proceedings Paper

The Distribution And Material Usage Efficiency Of Evaporation Sources
Author(s): Joseph H. Apfel
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Paper Abstract

The cost of materials is often a major part of the total cost of thin film products such as solar cells. When evaporation is used to manufacture a thin film product, the material cost depends upon the efficiency of material utilization which, in turn, depends upon the vapor source distribution and the portion of the vapor stream that is condensed on the substrate. The vapor incident on a flat substrate suspended and conveyed over single and multiple evaporation sources is analyzed. The sources are assumed to have symmetric vapor distributions described by fcos⊕ + gcos3⊕(P. The results are then applied to the design of masks which attenuate a portion of the vapor stream to provide a coating with uniform thickness. Graphs of the material usage efficiencies are provided for common configurations.

Paper Details

Date Published: 28 November 1983
PDF: 9 pages
Proc. SPIE 0401, Thin Film Technologies I, (28 November 1983); doi: 10.1117/12.935533
Show Author Affiliations
Joseph H. Apfel, Optical Coating Laboratory, Inc. (United States)


Published in SPIE Proceedings Vol. 0401:
Thin Film Technologies I
J. Roland Jacobsson, Editor(s)

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