SAE Magnetics Assigned Three Patents

Thermally-assisted magnetic recording head capable of preventing solder overflow during manufacturing
SAE Magnetics, (H.K.) Ltd., Hong Kong, Hong Kong, has been assigned a patent (10,622,783) developed by Hosoi, Ryo, Honda, Takashi, and Kawato, Makoto, Hong Kong, Hong Kong, for a “thermally-assisted magnetic recording head capable of preventing solder overflow during manufacturing.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A light source-unit which is used for a thermally assisted magnetic head, comprises a laser diode and a sub-mount which the laser diode is joined. The sub-mount comprises a joint-surface which the laser diode is joined and a convex part protruding from the joint-surface. The light source-unit comprises an alloy layer, made of alloy, which is formed between the surface of the convex part and an opposing-surface, of the laser diode, opposing to the joint-surface.”

The patent application was filed on February 4, 2019 (16/266,118).

Thermally assisted magnetic head, method for reducing reflected light, head gimbal assembly, and hard disk drive
SAE Magnetics, (H.K.) Ltd., Hong Kong, Hong Kong, has been assigned a patent (10,614,841) developed by Hosoi, Ryo, Takayama, Seiichi, Nishijima, Natsuo, and Honda, Takashi, Hong Kong, Hong Kong, for “thermally assisted magnetic head, method for reducing reflected light, head gimbal assembly, and hard disk drive.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a medium-opposing surface opposing a magnetic recording medium, a light source-opposing surface arranged rear side of the medium-opposing surface, an anti-reflection film formed on the light source-opposing surface, a core layer and a cladding layer. The anti-reflection film includes a stacked structure which a first layer and a second layer are stacked. The second layer is formed with high refractive index dielectric having the refractive index higher than the first layer.”

The patent application was filed on November 30, 2018 (16/205,272).

Transition curvature improvement on thermally assisted magnetic recording
SAE Magnetics, (H.K.) Ltd., Hong Kong, Hong Kong, has been assigned a patent (10,607,636) developed by Lai, Wai Yuen Anthony, and Ma, Shun Kit, Hong Kong, Hong Kong, for a “system for transition curvature improvement on a thermally assisted magnetic recording.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A system for transition curvature improvement on thermally assisted magnetic recording, includes: an energy source, a thermally assisted magnetic recording head including a magnetic main pole for writing of a thermally assisted magnetic recording medium, a waveguide for directing an energy produced by the energy source, and a PPG including a peg and adjacent to the waveguide, the PPG being for turning the energy into a surface plasmon which travels down the peg to heat the thermally assisted magnetic recording medium. The magnetic main pole includes a first portion enabling a first magnetic field strength and at least one additional portion enabling a magnetic field strength stronger than the first magnetic field strength such that a magnetic field of the magnetic main pole along a horizontal direction thereof enables generation of a substantially straight transition curve while writing on the thermally assisted magnetic recording medium.”

The patent application was filed on October 18, 2019 (16/656,596).