| 摘要 |
Provided is a porous alumina membrane filter that is not susceptible to cracking and that can mitigate warping to enable appropriate use and that has excellent handleability and flatness; also provided is a method for manufacturing the same. The porous alumina membrane filter has an aluminum portion made of an aluminum substrate, and an anode oxide film portion made of an anode oxide film having a plurality of micropores formed in the direction of thickness thereof. The aluminum portion is formed to cover at least the edge of a main surface of the membrane filter, and the area ratio of the aluminum portion is 10-60% of the entire area of the main surface. |
