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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. Sixth quarterly report, June 18, 1977--September 18, 1977

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The ''Multiple Blade Alignment Device'' has been reported to JPL as a New Technology item, and is currently being reviewed for patent potential. The device has proven difficult to install on a blade package. Successful engagement of the device has resulted in an intrinsic parallelism of the ends of the package to within 3..mu.., compared to standard errors prior to correction of over 50..mu... Measurements of blade misalignment indicate an average runout of 50..mu.. in a 220 blade package. This compares well with predictions based on thickness variation measurements of blades and spacers. Early cutting tests with 0.15 mm blades … continued below

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82 pages

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Holden, S. C. & Fleming, J. R. September 30, 1977.

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The ''Multiple Blade Alignment Device'' has been reported to JPL as a New Technology item, and is currently being reviewed for patent potential. The device has proven difficult to install on a blade package. Successful engagement of the device has resulted in an intrinsic parallelism of the ends of the package to within 3..mu.., compared to standard errors prior to correction of over 50..mu... Measurements of blade misalignment indicate an average runout of 50..mu.. in a 220 blade package. This compares well with predictions based on thickness variation measurements of blades and spacers. Early cutting tests with 0.15 mm blades and 10 cm diameter ingots show lower yield and accuracy and higher cutting speed than previous standard tests. This seems to be a result of effective high abrasive concentration on the blades as a result of the slurry application technique. A similar, more dramatic reduction of yield occurs with a thin slurry oil. This appears to occur by increased slurry transport to the blades and another effective increase of abrasive packing to the cutting region. Design of the large capacity MS saw is proceeding well, with a final conceptual design in progress. A flywheel system for work-piece drive is described. The design offers a practical conservative motion for the drive, requiring a minimum of power. 10 cm MS slices have been sent out for solar cell fabrication. 10 cm diameter and 2 cm square MS slices have been delivered for various surface preparations, and will be fabricated into cells and evaluated for performance. This will develop a minimum surface removal technique for both the damage and profiles peculiar to thin MS sices while allowing high efficiency cell production.

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82 pages

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Dep. NTIS, PC A05/MF A01.

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 30, 1977

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 8, 2021, 12:40 p.m.

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Thumbnail image of item number 1 in: '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. Sixth quarterly report, June 18, 1977--September 18, 1977'.
Thumbnail image of item number 2 in: '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. Sixth quarterly report, June 18, 1977--September 18, 1977'.
Thumbnail image of item number 3 in: '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. Sixth quarterly report, June 18, 1977--September 18, 1977'.
Thumbnail image of item number 4 in: '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. Sixth quarterly report, June 18, 1977--September 18, 1977'.

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Holden, S. C. & Fleming, J. R. 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. Sixth quarterly report, June 18, 1977--September 18, 1977, report, September 30, 1977; United States. (https://digital.library.unt.edu/ark:/67531/metadc1071939/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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