摘要 |
<p>A metal sheet (1) which constitutes a non-sintered type electrode support is processed to have minute irregularities on its surface. The irregularities are formed by a mechanical method such that protrusions (9) and indentations (8) are configured with a center-to-center pitch (P) in the range of from 50 to 300 νm and such that the apparent thickness after processing is at least three times as large as the unprocessed material thickness.</p> |