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There are a total of 31 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Laser assisted deposition
Author(s): Dutta, S.
Abstract: Applications of laser-based processing techniques to solar cell metallization are discussed. Laser-assisted thermal or photolytic maskless deposition from organometallic vapors or solutions may provide a viable alternative ...
NASA Center: NASA (non Center Specific) Publication Year: 1983
Added to NTRS: 2008-10-06
Accession Number: 84N21998; Document ID: 19840013930
Frequency-offset insensitive digital modem techniques
Author(s): Dutta, S.; Nicholas, D. C.
Abstract: Conventional DPSK systems are adversely affected by transmitter/receiver frequency offsets due to frequency reference errors and Doppler shifts. Two DPSK modem concepts are presented which avoid the long frequency ...
NASA Center: NASA (non Center Specific) Publication Year: 1990
Added to NTRS: 2008-06-01
Accession Number: 92N24175; Document ID: 19920014932
Laser-assisted solar-cell metallization processing
Author(s): Dutta, S.
Abstract: A photolytic metal deposition system using a focused continuous wave ultraviolet laser, a photolytic metal deposition system using a mask and ultraviolet flood illumination, and a pyrolytic metal deposition system using a ...
NASA Center: NASA (non Center Specific) Publication Year: 1984
Added to NTRS: 2005-11-04
Accession Number: 85N32429; Document ID: 19850024116
Si3N4-Based Ceramic With Greater Hot Strength
Author(s): Dutta, S.; Buzek, B.
Abstract: Zyttrite-doped material outperforms MgO-doped material above 1,200 degrees C. New ceramic material produced by addition of 10 weight percent zyttrite (yttria-stabilized zirconia) to (silicon nitride) offers ...
NASA Center: Glenn Research Center Publication Year: 1986
Added to NTRS: 2005-09-30
Accession Number: 86B10128; Document ID: 19860000128; Report Number: LEW-14193
Metalizing Solar Cells by Selective Electroplating
Author(s): Dutta, S.; Palaschak, P. A.
Abstract: Contact patterns traced by laser scanning. Conductor paths deposited on silicon solar-cell wafers by laser irradiation followed by electroplating. Laser-assisted metalization technique offers better resolution and lower ...
NASA Center: Jet Propulsion Laboratory Publication Year: 1986
Added to NTRS: 2005-09-30
Accession Number: 86B10190; Document ID: 19860000190; Report Number: NPO-16600
"SiAION" Materials for Advanced Structural Applications
Author(s): Dutta, S.
Abstract: New ceramics for gas turbines and other applications are strong, oxidation resistant, and chemically stable. Recently prepared state-of-the-art report on SiAION materials includes work on phase relations, crystal structure, ...
NASA Center: Glenn Research Center Publication Year: 1982
Added to NTRS: 2005-09-30
Accession Number: 81B10173; Document ID: 19810000173; Report Number: LEW-13671
State-of-the-art of SiAlON materials
Author(s): Dutta, S.
Abstract: The state of the art of 'SiAlONs' is reviewed, noting that the term has become a generic one applied to Si3N4 based materials. Attention is given to work on phase relations, crystal structure, synthesis, fabrication, and ...
NASA Center: Glenn Research Center Publication Year: 1979
Added to NTRS: 2004-11-03
Accession Number: 80A13066; Document ID: 19800028896
State-of-the-art SiAlON materials
Author(s): Dutta, S.
Abstract: The state of the art of SiAlONs is examined. The review includes work on phase relations, crystal structure, synthesis, fabrication, and properties of various SiAlONs. The essential features of compositions, fabrication ...
NASA Center: Glenn Research Center Publication Year: 1980
Added to NTRS: 2004-11-03
Accession Number: 80N29358; Document ID: 19800020857
Pressureless sintered beta prime-Si3N4 solid solution: Fabrication, microstructure, and strength
Author(s): Dutta, S.
Abstract: Si3N4, AlN, and Al2O3 were used as basic constituents in a study of the pressureless sintering of beta prime-Si3N4 solid solution as a function of temperature. Y2O3-SiO2 additions were used to promote liquid-phase sintering. ...
NASA Center: Glenn Research Center Publication Year: 1977
Added to NTRS: 2004-11-03
Accession Number: 78N29245; Document ID: 19780021302; Report Number: NASA-TM-78950
Laser-assisted solar cell metallization processing
Author(s): Dutta, S.
Abstract: Laser-assisted processing techniques utilized to produce the fine line, thin metal grid structures that are required to fabricate high efficiency solar cells are examined. Two basic techniques for metal deposition are ...
NASA Center: Jet Propulsion Laboratory Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84N29354; Document ID: 19840021285; Report Number: DOE/JPL-956615-84/1, DRD-SE5, DRL-203, NAS 1.26:173764, NASA-CR-173764
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