Patent ID: 8309430

Claim:
A semiconductor manufacturing method for joining a joint surface of a first substrate and a joint surface of a second substrate, the semiconductor manufacturing method comprising: pressing the first substrate and the second substrate, which are arranged to oppose the joint surfaces thereof each other, in a predetermined position on an opposite surface of the joint surface of the second substrate such that the joint surface of the first substrate and the joint surface of the second substrate are in contact with each other; restraining the second substrate with a member to provide a gap between the joint surface of the first substrate and the joint surface of the second substrate; imaging an image including a plane area of the first substrate from the opposite surface side of the joint surface of the second substrate or from an opposite surface side of the joint surface of the first substrate; and calculating, based on the image, a joint interface and determining, based on a rate of change of the joint interface, whether joining is normally performed.