Development of metallization process. Final report

Technical Report · Mon Apr 01 04:00:00 EST 1985

DOI:https://doi.org/10.2172/5750094· OSTI ID:5750094

Garcia, A. III

The object of this contract was the optimization, evaluation, and demonstration of a novel metallization applied by a screen printing process. A paste consisting of molybdenum, tin, and titanium hydride was selected as the promising composition. No satisfactory cells were made using any of the molybdenum/tin pastes used as a complete replacement for conventional silver pastes. The major problem is the inability to form a bond between the pastes and silicon that withstands soldering. This problem can be overcome using a two step process where any interconnection to the cell is done at small pads of conventional screen printed silver. The most promising use of the molybdenum/tin metallization system would be this two step process with a silver paste serving as the soldering pad. The Mo/Sn system would compete with silver economically if silver prices rose and could serve as a backup process. Toward the end of this contract the use of a heated stage SEM with reactive gases was a great help in elucidating problems and suggesting solutions.

• Research Organization: Spectrolab, Inc., Sylmar, CA (USA)
• DOE Contract Number: NAS-7-100-956205
• OSTI ID: 5750094
• Report Number(s): DOE/JPL/956205-85/8; DRL-175; ON: DE85013585
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ADHESION
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
HYDRIDES
HYDROGEN COMPOUNDS
METALS
MOLYBDENUM
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SCREEN PRINTING
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE COATING
TIN
TITANIUM COMPOUNDS
TITANIUM HYDRIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS