US 11,933,955 B2
Method for evaluating quality of graphene
Byung Hee Hong, Suwon-si (KR); Dong Jin Kim, Suwon-si (KR); and Yun Sung Woo, Yongin-si (KR)
Assigned to SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR); GRAPHENE SQUARE INC., Suwon-si (KR); and Dankook University Cheonan Campus Industry Academic Cooperation Foundation, Cheonan-si (KR)
Filed by SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR); GRAPHENE SQUARE INC., Suwon-si (KR); and Dankook University Cheonan Campus Industry Academic Cooperation Foundation, Cheonan-si (KR)
Filed on Oct. 14, 2021, as Appl. No. 17/501,668.
Claims priority of application No. 10-2020-0185690 (KR), filed on Dec. 29, 2020.
Prior Publication US 2022/0206276 A1, Jun. 30, 2022
Int. Cl. G02B 21/00 (2006.01)
CPC G02B 21/0028 (2013.01) [G02B 21/006 (2013.01); G02B 21/008 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of evaluating quality of graphene using a confocal laser scanning microscope, the method comprising steps of:
irradiating with laser light a graphene layer formed on a catalyst layer;
detecting a signal of light reflected from the graphene layer;
forming a planar image of the graphene layer using the detected optical signal; and
analyzing a contrast between graphene and the catalyst layer in the planar image, wherein the graphene layer is continuously formed on the catalyst layer by a roll-to-roll process.