The present invention provides an elastic gasket which is mounted on to an annular groove provided on a seal surface of a cover member and is used for sealing between the cover member and a block member closely attached to the seal surface of the cover member. A deep n-well is formed below the surface of a CMOS substrate supporting a plurality of NFETs and PFETs having a nominal gate length of less than 0. The housing forms an enclosure for storing a removable media, such as a flexible magnetic media or optical disk.