Laser texture apparatus using laser diode
説明
A laser diode(LD) is used for a laser texture ap- paratus to form bumps on the Ni-P plated aluminum substrate for hard disks. The laser diode module of the apparatus com- prises a LD, a collimator lens, a polarization beam splitter, a quarter wave plate and an,objective lens for irradiating a pulsed laser beam on a surface on the substrate. The power of the LD is 3OOmW and the numerical aperture of the objective lens is 0.8 for applying high power density. The shape of the bumps made by the apparatus is similar to that of the bumps which made by laser texture apparatus comprising a high power continuous wave laser and an electro-optic modulator. The bump height is adjustable from lOnm to 35nm by changing the scanning length and the spindle speed. Index Term-Diode, Hard disk, Laser, Texture.
収録刊行物
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- IEEE International Magnetics Conference
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IEEE International Magnetics Conference AC10-AC10, 1999-01-01
IEEE