Abstract: A disk drive unit of the invention comprises a motor base; a disk stack comprising at least one disks; a spindle motor being attached to the motor base for rotating the disk stack; and a HSA comprising at least one HGA, which having first terminal pads; and a controlling circuit for controlling the at least one HGA, which having second terminal pads to connect with the first terminal pads; wherein both the first and second terminal pads are axially tightened face-to-face to have an electrical touch contact. The invention also discloses a method of manufacturing the disk drive unit and the HSA, and also a method of electrically connecting a terminal of head gimbal assembly with a terminal of controlling circuit thereof.