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公开(公告)号：US20240139663A1
公开(公告)日：2024-05-02
申请号：US18550839
申请日：2022-03-14
Applicant: CSK INC.
Inventor： GeunWoo Park
CPC classification number: B01D39/1692 , B01D19/0031 , B01D2239/10 , B01D2239/1216
Abstract: A method of manufacturing a porous filter includes a step of preparing a first porous filter having first micropores, a step of increasing the size of the first micropores by stretching while heating the first porous filter, a step of maintaining the increased size of the first micropores by sucking a liquid into the increased first micropores, and a step of forming a second porous filter having second micropores larger than the first micropores by evaporating the liquid.
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