Patent ID: 7353979

Claim:
A method of fabricating a substrate placing stage, comprising: providing a plate-shaped ceramic base having a substrate placing surface on a side of the ceramic base; providing a plate-shaped cooling member formed of a composite material containing components of a ceramic material and an aluminum alloy; inserting a joint material including an aluminum alloy layer between the ceramic base and the cooling member; heating the joint material at a temperature in a range from TS Â°C. to (TS-30) Â°C., wherein TS Â°C. is a solidus temperature of the aluminum alloy; pressing substantially normal to joint surfaces of the ceramic base and the cooling member, thereby joining the ceramic base and the cooling member via the joint material to obtain a joint layer including the aluminum alloy layer having a thickness in a range from 50 Î¼m to 200 Î¼m after joining.