Patent ID: 11887638
Assignee: SAE MAGNETICS (H.K.) LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A hard disk drive comprising:
a head gimbal assembly; and
a magnetic recording medium;
wherein the head gimbal assembly comprises a thermally assisted magnetic head and a suspension;
wherein the thermally assisted magnetic head comprises a structure which a light-source unit, having a laser diode, is joined to a slider in which an electromagnetic element is formed;
wherein the suspension comprises an opening part which penetrates from a slider arrangement surface, which the slider is arranged, to a light-source unit surface, which the light-source unit is arranged, and a flexure which forms the slider arrangement surface;
wherein the head gimbal assembly comprises an assembly structure which the light-source unit is inserted into the opening part from the slider arrangement surface of the suspension and the light-source unit is protruded from the light-source unit surface and the slider is adhered to the slider arrangement surface of the suspension, and a solder connector being formed so that the laser diode is connected to the flexure;
wherein the laser diode comprises an electrode pad layer, being connected to an electrode; and an outer surface in which the electrode pad layer is formed;
wherein the electrode pad layer comprises a solder-bonding pad part, which is formed inside of a peripheral end part of the outer surface;
and a solder-contact preventing part, which is formed between the solder-bonding pad part and the peripheral end part;
wherein the solder-contact preventing part is formed with small wettability material having solder wettability which is smaller than solder wettability of the solder-bonding pad part;
wherein the solder-bonding pad part and the solder-contact preventing part are formed so that a pad height, being a height from the outer surface to a surface of the solder-bonding pad part, is larger than a preventing height, being a height from the outer surface to a surface of the solder-contact preventing part;
wherein the solder connector touches with the solder-bonding pad part without touching with the solder-contact preventing part, thereby the solder connector is connected with the laser diode.