US 12,188,872 B2
Adhesion interface observation method
Yugo Tomita, Tokyo (JP); Tomoya Yoshida, Tokyo (JP); Takashi Iizuka, Tokyo (JP); and Kosuke Kawai, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Dec. 12, 2022, as Appl. No. 18/064,537.
Claims priority of application No. 2021-207812 (JP), filed on Dec. 22, 2021.
Prior Publication US 2023/0194431 A1, Jun. 22, 2023
Int. Cl. G01N 21/65 (2006.01); G01N 1/28 (2006.01); G01N 21/84 (2006.01); G01N 21/95 (2006.01)
CPC G01N 21/65 (2013.01) [G01N 1/286 (2013.01); G01N 21/658 (2013.01); G01N 21/95 (2013.01); G01N 2001/2873 (2013.01); G01N 21/8422 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An adhesion interface observation method adapted to observe, by an optical analysis method, a region in vicinity of an adhesion interface following adhesion and curing of an adhesive that is coated on adhered members and adheres the adhered members to each other, the adhesion interface observation method comprising:
exposing the cured adhesive by removing one of the adhered members;
forming an observation region by cutting a predetermined part of the adhesive by a predetermined thickness to reduce a thickness of the predetermined part of the adhesive;
obliquely cutting the observation region formed by the forming the observation region in an oblique direction that is inclined with respect to a thickness direction of the observation region; and
observing, by a surface-enhanced Raman scattering spectroscopy, Raman scattering light generated by applying excitation light to an observation possible region that is positioned on a side, of a part of the observation region having been subjected to the oblique cutting, on which a thickness of the part of the observation region is small.