US 12,145,087 B2
Device for applying magnetic field to a filter for reducing metallic contaminants
Hsuan-Ying Mai, Taoyuan (TW); Hui-Chun Lee, Hsinchu (TW); Chun-Kuang Chen, Zhubei (TW); and Tung-Hung Feng, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed on Jul. 26, 2022, as Appl. No. 17/874,272.
Application 17/874,272 is a division of application No. 16/548,532, filed on Aug. 22, 2019, granted, now 11,666,838.
Claims priority of provisional application 62/753,915, filed on Oct. 31, 2018.
Prior Publication US 2022/0362693 A1, Nov. 17, 2022
Int. Cl. B01D 35/06 (2006.01); B01D 35/30 (2006.01); B03C 1/28 (2006.01); B03C 1/30 (2006.01)
CPC B01D 35/06 (2013.01) [B01D 35/30 (2013.01); B03C 1/288 (2013.01); B03C 1/30 (2013.01); B03C 2201/18 (2013.01); B03C 2201/20 (2013.01); B03C 2201/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for filtering a fluid, comprising:
introducing the fluid including metallic contaminants in a cylindrical filter housing including a filter membrane;
exposing the fluid along a peripheral region of the cylindrical filter housing to a magnetic field generated by a plurality of electromagnets attached directly to an outer surface of the cylindrical filter housing and circumferentially separated from each other,
wherein the plurality of electromagnets are a plurality of arc segments, circumferentially adjacent arc segments of the plurality of arc segments have opposite polarity poles in contact with the filter housing, diametrically opposite arc segments of the plurality of arc segments have same polarity poles,
wherein a magnetic field strength of a magnetic field generated by the plurality of arc segments at a location of the filter membrane is different than a magnetic field strength of the magnetic field generated by the plurality of arc segments along the peripheral region of the cylindrical filter housing, and
wherein a first pole of each arc segment of the plurality of arc segments is disposed between the cylindrical filter housing and a second pole of each arc segment, the first pole separates the second pole from the filter housing, and the first pole and second pole have opposite polarities;
passing the fluid through the filter membrane; and
removing the filtered fluid from the cylindrical filter housing.