Sae Magnetics (h.k.) Limited

Hong Tian

Po-Kang Wang

Yen Fu

Ellis T Cha

Manuel Hernandez

Yaw-Shing Tang

Ben Hu

Yu Meng Li

Takehiro Kamigama

Jia Shen

Jeffery L Wang

Chi Hung Yuen

Hai Ming Zhou

Yuanzhan Hu

Cheng-Teh Wu

Tommy Chan

Guo Qiang Zheng

Hao Qing Pan

Method and apparatus are presented for electrically coupling a slider to ground. In one embodiment, a bonding pad is provided on a side of the slider body separate from the bonding pad(s) used for read/write signals. This separate bonding pad is electrically coupled within the slider body to components that are to be coupled to ground. A separate conductor provided on the suspension (e.g., a trace, a flex circuit, etc.) may be electrically coupled to the separate bonding pad via gold ball bonding. The conductor is also coupled to ground in the hard-disk drive device (e.g., via the preamplifier). The use of the separated bonding pad and trace may negate the need to use a conductive adhesive to electrically ground the slider via its attachment to the tongue of a slider.

Method and apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording head

A gimbal design for a hard disk drive are disclosed. In one embodiment, a gimbal tongue is supported by a gimbal cross bar coupled to a suspension body by a pair of gimbal struts. A pair of grounding pads are mounted on either side of the leading edge of the gimbal tongue. A first limiter tab is coupled to the leading edge of the gimbal tongue and a second limiter tab is coupled to the trailing edge of the gimbal tongue. Notches on either side of the trailing edge limiter tab increase the strength of the tab. One or more cutouts allow the slider to be electrically coupled to bonding pads on the opposite side of the gimbal tongue. Angled slots at the juncture of the gimbal cross bar and the gimbal tongue relieve stress on the gimbal.

Gimbal design with solder ball bond pads and trailing edge limiter tab for a recording head

Apparatus are presented for electrically coupling a slider to ground. In one embodiment, a bonding pad is provided on a side of the slider body separate from the bonding pad(s) used for read/write signals. This separate bonding pad is electrically coupled within the slider body to components that are to be coupled to ground. A separate conductor provided on the suspension (e.g., a trace, a flex circuit, etc.) may be electrically coupled to the separate bonding pad via gold ball bonding. The conductor is also coupled to ground in the hard-disk drive device (e.g., via the preamplifier). The use of the separated bonding pad and trace may negate the need to use a conductive adhesive to electrically ground the slider via its attachment to the tongue of a slider.

Apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording head

A system and method are disclosed for calibrating a hard disc drive magnetic head flying height tester by a calibration standard, which includes a mock slider and mock disc, by optical interference techniques.

System and method for calibrating a hard disc drive magnetic head flying height tester by optical interference techniques

A system and method for treating (e.g. polishing to remove defects) the surface of a media, such as a magnetic hard disk, while in operation, such as during dynamic electrical testing is disclosed. Further, a method for manufacturing a head for treating the surface of a media is disclosed.

Method and apparatus for treating the surface of a media, such as a magnetic hard disk, while operating, such as during dynamic electrical testing

A magnetic head is described for use in a disk drive having a disk that is rotated during operation of the disk drive and stationary when the disk drive is non-operational. The disk includes a surface containing data tracks. The magnetic head compromises a slider including a forward edge, a trailing edge and an air bearing surface. A read/write transducer is mounted at the trailing edge of the slider. The slider and transducer are mounted within the disk drive, relative to the surface of the rotating disk, to fly above the surface of the disk during rotation of the disk, for reading and writing data from and to the data tracks, and to come to rest on the surface of the disk during non-operation of the disk drive. An array of overcoat protrusions is formed on and spaced across the slider to cover a predetermined and discrete area of the slider in a manner so that when the slider and transducer come to rest on the surface of the disk, contact with the surface of the disk occurs only at the array of overcoat protrusions.

Magnetic recording head having a carbon overcoat array on slider air

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Hong Kong, China

Hong Tian