Patent ID: 7149056

Claim:
A disk drive comprising: a housing having a base; a disk rotatably mounted in said housing and having a plurality of tracks; a negative pressure type head slider having a transducer for reading/writing data from/to said disk, a disk opposing surface, an air inlet end, and an air outlet end; and an actuator for moving said head slider across said tracks of said disk; said actuator comprising: an actuator arm rotatably mounted on said base; a suspension fixed at a base end portion thereof to a front end portion of said actuator arm; and said head slider mounted on a front end portion of said suspension; said head slider comprising: said transducer formed near said air outlet end; a first groove for generating a negative pressure by expanding air once compressed; and a plurality of second grooves formed on the bottom surface of said first groove so as to continuously extend from near said air inlet end to said air outlet end, said second grooves being spaced from each other in the transverse direction of said head slider, wherein an angle of extension of said second grooves with respect to the longitudinal direction of said head slider is continuously changed so that a direction of extension of an innermost groove is substantially parallel to an air inlet direction in an innermost track condition and a direction of extension of an outermost groove is substantially parallel to an air inlet direction in an outermost track condition.