Actions for Slicing of silicon into sheet material. Silicon sheet growth development for the large area silicon sheet task of the Low Cost Silicon Solar Array Project. First quarterly report, January 9, 1976--March 21, 1976

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Slicing of silicon into sheet material. Silicon sheet growth development for the large area silicon sheet task of the Low Cost Silicon Solar Array Project. First quarterly report, January 9, 1976--March 21, 1976

Author
Holden, S. C.
Published
United States : [publisher not identified], 1976.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1976.
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
Slurry sawing is a difficult to control abrasive wear process. In order to achieve the broad program goal of low cost slicing of silicon into solar cell wafers, the process must first be clearly understood and then techniques developed to allow more controllability and higher productivity. The theory of abrasive wear is presented to judge the efficiency of the slurry process relative to other documented forms of abrasive wear. The cutting rate of slurry sawing is related to load, kerf area, work material hardness and reciprocation speed. An explanation for the high efficiency of slurry sawing is offered in terms of binding forces on abrasive particles and the abrasive wear of brittle materials. Results of five cutting tests are given in which kerf length is 3.88 inches and .984 inch, and cutting loads are varied from two ounces to eight ounces per blade. Reduction of cutting rate to the normalized cutting efficiency, anti epsilon, shows the accuracy of the theory. The efficiency ranged from 1.13 to .86. The lower efficiencies occurred at high loads and short kerf length. Thickness measurements show a decrease in wafer accuracy with increasing cutting load and speed. Plans for the next three months of activity are given.
Report Numbers
ERDA/JPL/954374-76/1
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: NAS-7-100-954374 E
OSTI Identifier 7362837
Research organization: Varian Associates, Lexington, MA (USA). Lexington Vacuum Div.
View MARC record | catkey: 44799627