US 12,354,430 B2
Structural coloration substrate, method for manufacturing structural coloration substrate, and security verification system using structural coloration substrate manufactured thereby
Taikmin Lee, Daejeon (KR); Inyoung Kim, Seoul (KR); and Sin Kwon, Sejong (KR)
Assigned to KOREA INSTITUTE OF MACHINERY & MATERIALS, Daejeon (KR)
Appl. No. 17/287,584
Filed by KOREA INSTITUTE OF MACHINERY & MATERIALS, Daejeon (KR)
PCT Filed Oct. 2, 2019, PCT No. PCT/KR2019/012931
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/091241, PCT Pub. Date May 7, 2020.
Claims priority of application No. 10-2018-0131637 (KR), filed on Oct. 31, 2018; and application No. 10-2018-0131643 (KR), filed on Oct. 31, 2018.
Prior Publication US 2021/0390813 A1, Dec. 16, 2021
Int. Cl. G07D 7/1205 (2016.01); C23C 16/455 (2006.01); C23C 28/04 (2006.01); G02B 1/12 (2006.01); G02B 26/10 (2006.01); G02B 27/09 (2006.01); G07D 7/00 (2016.01); G07D 7/128 (2016.01)
CPC G07D 7/1205 (2017.05) [C23C 16/45529 (2013.01); C23C 28/04 (2013.01); G02B 1/12 (2013.01); G07D 7/003 (2017.05); G07D 7/128 (2013.01); G02B 26/10 (2013.01); G02B 27/0977 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a substrate, the method comprising:
forming a base substrate having a black-based color;
disposing an upper substrate directly on the base substrate and forming a groove on the upper substrate;
forming a pattern on the upper substrate by filling a quantum dot displaying a first color into the groove; and
stacking at least one structural coloration layer on an upper surface of the pattern,
wherein
the first color of the pattern is changed according to a quantity of the at least one structural coloration layer being stacked, and
the at least one structural coloration layer is formed to induce a constructive interference of light.