Patent ID: 8021488

Claim:
A sealing structure of a vacuum device comprising: a vacuum container, into which a processing gas is supplied, for accommodating therein a target object; a closing member for closing an opening port of the vacuum container; a first ring-shaped sealing member made of elastomer, which is interposed between the vacuum container and the closing member in an elastically deformed state to airtightly seal a gap between the vacuum container and the closing member; and a second ring-shaped sealing member interposed between the vacuum container and the closing member and arranged closer to an inner space of the vacuum container than the first sealing member, wherein a cavity is formed in the first sealing member along a circumferential direction thereof, and a cooling pipe in which a coolant circulates is inserted in the cavity, wherein a cooling pipe is not inserted in the second ring-shaped sealing member, wherein the first sealing member is configured to be cooled by the coolant, such that a gas permeability of the first sealing member is lowered and a gas outside the vacuum container is prevented from penetrating into the vacuum container, wherein the second sealing member is separated from the first sealing member by a partition wall such that the second sealing member is prevented from being cooled by the first sealing member, and wherein the second sealing member is configured to be not cooled and to prevent the processing gas inside the vacuum container from contacting with the first sealing member, such that the processing gas or product generated by the processing gas is prevented from being cooled and attached to a surface of the first sealing member.