US 11,668,642 B2
Method of measuring adhesive strength
Han Ho Park, Yongin-si (KR); Hyung-Don Na, Seoul (KR); Kyung Jun Park, Hwaseong-si (KR); Eun Ji Park, Suwon-si (KR); Chang Seob Jung, Icheon-si (KR); and Hyeon Deuk Hwang, Cheonan-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Feb. 23, 2021, as Appl. No. 17/182,707.
Claims priority of application No. 10-2020-0062404 (KR), filed on May 25, 2020.
Prior Publication US 2021/0364416 A1, Nov. 25, 2021
Int. Cl. G01N 19/04 (2006.01)
CPC G01N 19/04 (2013.01) [G01N 2203/0091 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of measuring adhesive strength, the method comprising:
setting an evaluation time (te);
fixing a substrate and an adhesive member to a measurement device;
pulling the adhesive member fixed to the measurement device with a first measurement force (Fe1) for the evaluation time (te);
pulling the adhesive member fixed to the measurement device with a second measurement force (Fe2), which is obtained by increasing the first measurement force (Fe1) by a preset amount, for the evaluation time (te); and
determining a reference measurement force (Fes) which is a static force applied to the adhesive member when a distance by which a first portion of the adhesive member is detached from the substrate is equal to a preset distance (dt).