Sae Magnetics (h.k.) Limited

Kaichiu Cheung

Takashi Honda

Seiichi Takayama

Ryuji Fujii

Ryo Hosoi

Juren Ding

Rongkwang Ni

Chiuming Lueng

Cheukman Lui

Hokei Lam

Wahchun Chan

Jingtao Lu

Fanglong Nie

Tsutomu Sasaki

A method of testing dynamic performances for a slider body of a thermally-assisted magnetic head includes: providing a slider body which is disconnected with a light source unit; removably mounting the slider body to a test head suspension assembly; keeping to provide a flat top beam to the slider body, the flat top beam being aligned with the optical waveguide, and a projection of an incident end of the optical waveguide being located within a light spot of the flat top beam; and testing the dynamic performance of the slider body. It can save the material cost and labor cost, and eliminate a precise optical alignment between an input light and an optical waveguide in the slider body to improve testing efficiency.

Method and system of testing slider body of thermally-assisted magnetic head

A spectral simulation method during a noise testing for a magnetic head, includes steps of (a1) detecting several first noise profiles for several magnetic head samples under a first frequency bandwidth range by a dynamic testing machine; (b1) separating each first noise profile into at least two noise curves including a first noise curve and a second noise curve at a predetermined frequency bandwidth, wherein the first noise curve has a frequency bandwidth range lower than that of the second noise curve; (c1) fitting several mathematical equations according to the second noise curves; and (d1) establishing a correlative equation among the mathematical equations, so as to simulate the second noise curve for each magnetic head. The present invention can simulate a second noise curve of the noise profile in a higher frequency bandwidth and establishing the correlative equation according to the second noise curve.

Spectral simulation method during noise testing for a magnetic head, and noise-testing method for a magnetic head by using the same

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Hong Kong, China

Kaichiu Cheung