Patent ID: 7622017

Claim:
A processing apparatus for performing a plasma process on a surface of an object to be processed by applying a high frequency power to an electrode installed in an airtight processing chamber, comprising: a thermal transfer gas feed pathway for supplying a thermal transfer gas, for controlling a temperature of the object to be processed, to a space between the object to be processed and a holding unit installed on a lower electrode for attracting and holding the object to be processed, through an inner portion of an insulating member disposed under the lower electrode, wherein the thermal transfer gas feed pathway extends across the insulating member and a portion of the thermal transfer gas feed pathway 1) is formed in a zigzag shape with respect to a direction of the axis of at least one electric field line in the insulating member during the plasma process and 2) is embedded within the insulating member and extended along a width of the insulating member, and wherein the thermal transfer gas feed pathway is extended from an upper surface of the insulating member to a lower surface of the insulating member to extend across an entire height of the insulating member.