| 摘要 |
This invention provides an electromagnetic absorber comprising a polymeric base material such as a glass substrate, a plastic substrate, a semiconductor substrate, a ceramic substrate, or a pressure-sensitive adhesive tape and a seed layer provided on the polymeric base material. An aluminum layer and an electromagnetic absorbing layer (10) are provided in that order on the seed layer. The total thickness of the aluminum layer and the electromagnetic absorbing layer (10) is about 1 µm. A protective film is provided on the electromagnetic absorbing layer (10). The electromagnetic absorbing layer (10) comprises an anodic oxide film (4) formed, for example, by anodic oxidation of aluminum or an aluminum alloy. A plurality of cylindrical nanoholes (5) are provided on the anodic oxide film (4). The diameter of the nanohole (5) is approximately several nanometers to several hundred nanometers, and the pitch is approximately several tens of nanometers to 500 nm. A columnar magnetic material (6) is embedded in each nanohole (5). The magnetic material (6) is formed of, for example, a ferromagnetic metal such as Co. |
