Patent ID: 11906476
Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G  C  B | IPC B  G

Claim 0:
1. A joining state detection method for detecting a joining state of two members that are joined at joining parts each having a joining surface, the method comprising the steps of:
forming the joining state detection film containing a mechanoluminescent substance on a first surface of a first of the two joining parts, the first surface being opposite to the joining surface of the first joining part; and
physically stimulating the joining part such that light is emitted from a luminescent part of the joining state detection film and light is not emitted from a non-luminescent part of the joining state detection film and an area of the non-luminescent part indicates an area of the joining surface where the two members are not joined.