Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Reexamination Certificate
2008-06-17
2008-06-17
Nguyen, Nam X (Department: 1795)
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
C136S261000, C438S098000, C205S123000, C205S157000
Reexamination Certificate
active
07388147
ABSTRACT:
In a solar cell having p doped regions and n doped regions alternately formed in a surface of a semiconductor wafer in offset levels through use of masking and etching techniques, metal contacts are made to the p regions and n regions by first forming a base layer contacting the p doped regions and n doped regions which functions as an antireflection layer, and then forming a barrier layer, such as titanium tungsten or chromium, and a conductive layer such as copper over the barrier layer. Preferably the conductive layer is a plating layer and the thickness thereof can be increased by plating.
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Cudzinovic Michael J.
Mulligan William P.
Pass Thomas
Smith David
Swanson Richard M.
Barton Jeffrey T
Nguyen Nam X
Okamoto & Benedicto LLP
Sunpower Corporation
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