Patent ID: 11887875
Assignee: MIRAIAL CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A container main body including a substrate storing space formed therein which can store a plurality of substrates, and including an opening circumferential portion at one end thereof at which a container main body opening portion in communication with the substrate storing space is formed;
a lid body that is attachable to and detachable from the opening circumferential portion and can close the container main body opening portion in a positional relationship being surrounded by the opening circumferential portion;
a sealing member that is attached to the lid body, can abut the lid body and the opening circumferential portion, and intervenes between the opening circumferential portion and the lid body to adhere to and abut the opening circumferential portion, thereby closing the container main body opening portion together with the lid body; and
a filter portion including a ventilation passage that allows the substrate storing space and an outer space of the container main body to be in communication with each other, a filter disposed in the ventilation passage, and a filter portion housing forming the ventilation passage, wherein the filter portion is disposed at the container main body, and allows a gas to pass between the outer space of the container main body and the substrate storing space through the filter;
wherein the filter portion includes an exhaust filter portion that allows a gas to flow from the substrate storing space to the outer space of the container main body, and a gas supply filter portion that allows a gas to flow from the outer space of the container main body to the substrate storing space,
wherein the filter is provided in the ventilation passage for exhaust that allows the gas to flow from the substrate storing space to the outer space of the container main body, and partitions the ventilation passage into an upstream side and a downstream side,
wherein an exhaust filter film total effective area that allows a gas to flow through the filter is 200 mm2 or more, and
wherein airtightness of the substrate storing space is enhanced so that 50% or more of a gas supplied to the substrate storing space can be discharged from the exhaust filter portion in a case in which a supply amount of a gas supplied from the outer space of the container main body to the substrate storing space through the gas supply filter portion is 22 liters per minute or less.