SAE Magnetics Assigned Two Patents

MAMR head slider with diamoind-like carbon layer and silicon nitride layer, and related head gimbal assembly and disk drive
SAE Magnetics (H.K.) Ltd., Hong Kong, China, has been assigned a patent (12106783) developed by He, Da Yao, Huang, Rong, Li, Hua, Huang, Jian Hui, and Liu, Peng, Hong Kong, China, for “microwave-assisted magnetic recording (MAMR) head slider with diamoind-like carbon layer and a silicon nitride layer, and related head gimbal assembly and disk drive unit.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The present disclosure discloses a device with a protective layer, including a substrate, a seed layer formed on the substrate, and a diamond-like carbon layer formed on the seed layer, where the seed layer is a silicon nitride layer, and a content of nitrogen in the silicon nitride layer is 9%-17%. The present disclosure further discloses a microwave-assisted magnetic recording (MAMR) head slider, a head gimbal assembly, and a disk drive unit. The device has good thermal stability, oxidation resistance and corrosion resistance, thereby improving reliability and prolonging service life of an MAMR head.”

The patent application was filed on 2023-07-06 (18/348073).

Magnetic head, head gimbal assembly, HDD, and method for processing magnetic head
SAE Magnetics (H.K.) Ltd., Hong Kong, China, has been assigned a patent (12106786) developed by Fujii, Ryuji, Chen, Shi Xiong, Zhang, Zeng Hui, Lei, Yong, and Zhang, Yong Jun, Hong Kong, China, for “magnetic Head, head gimbal assembly, hard disk drive, and method for processing magnetic head“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The present disclosure discloses a magnetic head, a head gimbal assembly, a hard disk drive, and a method for processing a magnetic head. The method comprises irradiating at a fixed point proximal to the read/write part with a laser irradiation device until the read head and the write head are thermally expanded; orientating air bearing surfaces of a plurality of magnetic heads forming a magnetic strip toward a lapping surface of a lapping device after laser irradiation, holding the air bearing surfaces in place, lapping with the lapping device until the air bearing surfaces are coplanar; and disassembling the magnetic strip to obtain a lapped magnetic head. Through laser heating induced compensation, the heights of lapped read head and write head of the magnetic head meet their respective target values, ensuring the normal reading and writing of the storage medium of the magnetic disk.”

The patent application was filed on 2022-11-01 (17/978480).