| 摘要 |
A sample holder includes a substrate which is formed of a ceramic containing aluminum nitride as a primary component and which has an outer surface functioning as a sample holding surface and an electrical conductor which is provided in the substrate and which faces the sample holding surface. In this sample holder, at the sample holding surface side in the substrate than the electrical conductor, the oxygen content of the ceramic is small in a region located inside the periphery of the electrical conductor as compared to that in a region located outside the periphery thereof. |
