METHODS FOR IMPROVING PERFORMANCE VARIATION OF A SOLAR CELL MANUFACTURING PROCESS
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United States of America Patent
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Issued Date -
Jul 15, 2010
app pub date -
Jan 13, 2009
filing date -
Jan 13, 2009
priority date (Note) -
Abandoned
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Abstract
A method for optimizing a solar cell manufacturing process is described. The method includes determining a reference finger spacing value and a reference bulk lifetime for the solar cell manufacturing process. The method also includes measuring an actual bulk lifetime of a wafer with an in-line measurement tool. The method further includes calculating an optimal finger spacing value with a computer coupled to the in-line measurement tool, the optimal finger spacing value being the product of the reference finger spacing value and a square root of the actual bulk lifetime divided by the square root of the reference bulk lifetime. The method further includes forming a junction on the wafer, and depositing a set of busbars and a set of fingers on the wafer with a metal deposition device, wherein a distance between a first finger and a second finger of the set of fingers is about the optimal finger spacing value.
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