Separator of fuel cell and method for producing same
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United States of America Patent
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Jul 11, 2006
Issued Date -
N/A
app pub date -
Nov 8, 2002
filing date -
May 8, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells includes a recessed gas path. Depth fluctuations of the gas path can be reduced. It is formed easily even if the separator is formed of a hard material. The gas path having plural depths or gradation can be formed easily. An electrically conductive member, as a separator, and a processing electrode, having patterned electrode projections, are immersed in an electrolytic solution facing each other. Current is fed between the conductive member and electrode for electrolytic processing to dissolve the portion of the conductive member facing the projections, thus forming a gas path having a surface roughness Rz on this bottom surface not larger than 1 .mu.m.
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