Patent ID: 7876527

Claim:
A magnetic disk device comprising: a disk; a spindle motor which rotationally drives the disk; a head which records and reproduces information on the disk; an actuator assembly which moves the head over the disk in the direction of the radius thereof; a base provided with the head, spindle motor and actuator assembly and an FPC assembly which performs an electrical connection; an opening in the base; a cover; a weld configured to hermetically seal the cover to the base; a space between the cover and the base configured to enclose the magnetic disk device; a low-density gas configured to fill the space between the cover and the base; a feedthrough comprising, pins to electrically connected to the FPC assembly; a flange of the feedthrough configured to be larger in outer shape than the opening of the base and configured to be connected to the outside of the opening of the base; and a sealing material configured to hermetically seal the pins to the flange, wherein the sealing material is selected from a group of sealing material consisting of: glass or ceramic; and solder configured to connect the flange to the feedthrough to the outside of the opening of the base.