Patent ID: 9741595
Date: 2017-08-22
CPC Classifications: H01L

Claim:
1. A method of bonding substrates to each other, comprising: a first holding operation of holding a first substrate on a lower surface of a first holding part; a temperature adjusting operation of adjusting a temperature of a second substrate by a temperature adjusting part to become higher than a temperature of the first substrate; a second holding operation of holding the second substrate temperature-adjusted at the temperature adjusting operation on an upper surface of a second holding part; an inspecting operation of inspecting a state of the second substrate by imaging a plurality of reference points of the second substrate held in the second holding part with a first imaging part, measuring positions of the reference points, and comparing a measurement result with a predetermined permissible range; and a bonding operation of, if the state of the second substrate is determined to be normal at the inspecting operation, pressing a central portion of the first substrate with a pressing member, bringing the central portion of the first substrate into contact with a central portion of the second substrate, and sequentially bonding the first substrate and the second substrate from the central portion of the first substrate toward an outer peripheral portion thereof.