Patent ID: 6170690
Filing Date: 2001-01-09
Classification: H01L

Abstract:
An air-tightly sealable bell jar container for holding a plurality of wafer materials which comprises:(A) a bell jar covering having a generally rectangular cross section;(B) a base plate having a laterally and downwardly opening groove along the outer side periphery, the dimensions of the base plate being smaller than the inner dimensions of the bell jar covering at the lower end thereof;(C) an O-ring gasket member to fit the groove of the base plate;(D) a presser plate positioned below the base plate and for moving up and down to press the O-ring gasket member against the base plate in such a fashion that the O-ring gasket member is elastically deformed and bulged out laterally to be brought into contact with the inner wall of the bell jar covering surrounding the base plate; and(E) a cam mechanism pivotally connected to a rod extending from the lower surface of the base plate to penetrate the presser plate for pushing the presser plate against the base plate as being rotated by a cam lever,the bell jar covering being provided on each of the two oppositely facing side inner walls with a plurality of parallel wafer-holding pleats to make wafer-receiving grooves at a regular pitch for alignment of wafer materials.