Abstract: The present invention has an object to provide, in a container having packing to be used in an environment which produces the difference in the air pressure inside and outside the container due to air transportation and the like, with a configuration that prevents the containment of a negative pressure inside the container. By means of using packing with superior adhesion provided with minute uneven shapes at one or more places of the packing, a container can be obtained which exhibits airtightness in an environment not having a difference in the air pressure inside and outside the container, and which will not cause containment of a negative pressure inside the container at the time of the ambient air pressure fluctuations, for example during the above-mentioned air transportation and the like. Furthermore, the same effect can be obtained even if a minute uneven part is provided at one or more places on the surface of the container main body or the cover that makes contact with the packing.

Abstract: A carrier box serving as a thin-plate supporting container includes a container body for defining therein a chamber for supporting and housing therein a plurality of semiconductor wafers and a lid for covering the container body. In one embodiment, the carrier box includes an internal-pressure adjusting mechanism for maintaining the internal pressure in the chamber at the same level as that of the external pressure against the chamber. The internal-pressure adjusting mechanism is composed of an opening formed in a wall of the container body and a filter detachably mounted in the opening for removing foreign matters while allowing gas to easily enter and exit the chamber so as to maintain the chamber in a clean state. In another embodiment, the carrier box includes a gasket made of a porous material.

Abstract: An easily attachable/detachable lid mounted container includes a container body, a lid for covering the container body, and an easy attach/detach mechanism for reliably securing the lid to the container body and for easily detaching the lid from the container body. The easy attach/detach mechanism includes: an engagement plate provided on the lid and extending toward the container body, the engagement plate being resilient and bendable; an object engagement portion, provided on the container body, for engaging, when the lid is pressed toward the container body, with the engagement plate so as to secure the lid to the container body; and separation means, provided between the engagement plate and the object engagement portion, for separating the engagement plate from the object engagement portion when the separation means is pressed toward the container body.

Abstract: A carrier box serving as a thin-plate supporting container includes a container body for defining therein a chamber for supporting and housing therein a plurality of semiconductor wafers and a lid for covering the container body. In one embodiment, the carrier box includes an internal-pressure adjusting mechanism for maintaining the internal pressure in the chamber at the same level as that of the external pressure against the chamber. The internal-pressure adjusting mechanism is composed of an opening formed in a wall of the container body or the like, and a filter detachably mounted in the opening for removing foreign matters while allowing gas to easily enter and exit said chamber so as to maintain the chamber in a clean state. In another embodiment, the carrier box includes a gasket made of a porous material or the like.

Abstract: A carrier box serving as a thin-plate supporting container includes a container body for defining therein a chamber for supporting and housing therein a plurality of semiconductor wafers and a lid for covering the container body. In one embodiment, the carrier box includes an internal-pressure adjusting mechanism for maintaining the internal pressure in the chamber at the same level as that of the external pressure against the chamber. The internal-pressure adjusting mechanism is composed of an opening formed in a wall of the container body or the like, and a filter detachably mounted in the opening for removing foreign matters while allowing gas to easily enter and exit the chamber so as to maintain the chamber in a clean state. In another embodiment, the carrier box includes a gasket made of a porous material or the like.