Tdk Corporation

Sae Magnetics (h.k.) Limited

Chung Keung Ho

Hiroshi Kiyono

Noboru Yamanaka

Tatsushi Shimizu

Katsuki Kurihara

Nobuya Oyama

Cheung Kwan Lau

The head slider has a plurality of heaters each heating a corresponding region of the ABS, and a sensor detecting collision of the ABS with a projection on a surface of the magnetic disk. Currents supplied to the respective heaters are controlled and produce heats independently of one another. The heats produce projections on the corresponding regions of the ABS, respectively. The ABS with asperity can be planarized through appropriately controlling magnitude of the currents supplied to the heaters. Thus, the variation of a sensor output depending on asperity of the ABS is effectively reduced. Another head slider has a heater locally heating a corresponding region of the ABS. The heater has a structure where a central portion is away from the ABS compared with end portions, or a structure where calorific power of a central portion is smaller than that of each of end portions. Thus, overall projection shape becomes flat.

Head slider, glide height checking apparatus, and glide height checking method

Growing community of inventors

Hong Kong, China

Chung Keung Ho