Patent ID: 8506712

Claim:
A method for manufacturing a wafer support jig on which a treatment target wafer is mounted and supported on a support surface when performing a heat treatment, comprising: performing a heat treatment in one of an atmosphere containing an inert gas, an atmosphere containing a hydrogen gas, and a mixed gas atmosphere containing these gases to a polycrystalline substance that becomes a base material for the wafer support jig to form protruding objects on the support surface; setting skewness R sk on the support surface to 0<R sk <10; and manufacturing a wafer support jig that has 10 0 to 10 5 protruding objects each having a height of 2 μm or above and less than 30 μm within arbitrary 1 mm 2 without protruding objects each having a height of 30 μm or above on the entire support surface.