公开(公告)号：US20220188536A1

公开(公告)日：2022-06-16

申请号：US17538901

申请日：2021-11-30

Applicant: Samsung Display Co., Ltd.

Inventor： JOON-HWA BAE ,  BONGGU KANG ,  SEUNGBAE KANG ,  HEESUNG YANG ,  WOOJIN CHO ,  BYOUNG KWON CHOO

IPC: G06K9/00 ,  G06F1/16 ,  G06F3/041 ,  G06F21/32

Abstract: A method of manufacturing a detection sensor is disclosed. The method includes forming a biometric information sensing layer including a transistor on a base layer, forming an initial optical pattern layer on the biometric information sensing layer, patterning the initial optical pattern layer to form a plurality of transmissive portions spaced apart from each other and having a first zeta potential, coating a light blocking material to form an initial light blocking portion that covers a side surface and an upper surface of the transmissive portions and has a second zeta potential different from the first zeta potential, and polishing the initial light blocking portion such that the upper surface of the transmissive portions is exposed to form a light blocking portion. The initial light blocking portion is polished by the abrasive, which has the first zeta potential, using a pad.