News
Announcement concerning rare earth sintered magnet grain boundary diffusion alloy method
Shin-Etsu Chemical has a large number of patents on materials and manufacturing methods in the world around the grain boundary diffusion alloy method (* 1).
Among numerous owned patents, I will inform you of the features below, especially regarding representative patents (* 2).
<Patent content features>
1. The existence of F (fluorine) is observed in the rare earth sintered magnet body.
2. F (fluorine) is distributed from the center of the magnet body toward the surface of the magnet body so that the content concentration is increased.
Shin-Etsu Chemical Co., Ltd. does not grant permission to any third party concerning patents related to
the above-mentioned grain boundary diffusion alloy method.
※ 1. Grain boundary diffusion alloy method
A technology to dramatically increase coercive force (Hcj) by placing a small amount of heavy rare earth (Tb, Dy, etc.) at an appropriate position.
Shin-Etsu Chemical's technology is called grain boundary diffusion alloy method.
※ 2. Patent registration number (part)
Japan: 4702546/4702547/4702548/4702549
China: ZL200610009370.7 / ZL200610019898.2 / ZL200610019899.7 / ZL200610009371.1
USA: 7488393/7488395/7520941/7488394
EP: 1705671/1705670/1705668/1705669
★ For further information on the above patents, please contact below.
Shin-Etsu Chemical Co., Ltd. Electronic Materials Business Division Magnet Department
TEL: 81-3-3246-5215
<Patent content features>
The above information is stated for your reference.
Shin-Etsu Chemical Co., Ltd. can not assume any responsibility even if everyone should suffer damage due to the above information, so please judge and act with everyone's own responsibility I will tell you.
Shin-Etsu Chemical Co., Ltd. can not assume any responsibility should anyone suffer any damage due to the above information, so please be responsibe for utlizing your own judgement and actions.