METHOD AND APPARATUS FOR THE FORMATION OF SOLAR CELLS WITH SELECTIVE EMITTERS
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United States of America Patent
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Issued Date -
Apr 18, 2013
app pub date -
Oct 12, 2012
filing date -
Oct 13, 2011
priority date (Note) -
Abandoned
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Abstract
Methods and apparatus for forming solar cells with selective emitters are provided. A method includes positioning a substrate on a substrate receiving surface. The substrate has a surface comprising a first patterned heavily doped region having a first dopant concentration that defines the selective emitters, and a second doped emitter region having a second dopant concentration that is less than the first dopant concentration, wherein the second doped emitter region surrounds the first patterned heavily doped region. The method further comprises determining a position of the first patterned heavily doped region by using a Fourier transform to process a filtered optical image, aligning one or more distinctive elements in a screen printing mask with the first patterned heavily doped region by using information received from the determined position of the first patterned heavily doped region, and depositing a layer of material on a portion of the first patterned heavily doped region.
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