Patent ID: 7703494

Claim:
A bonded substrate manufacturing apparatus which bonds a first substrate and a second substrate together, the apparatus comprising: a liquid crystal dripping device configured to drip liquid crystal on at least either one of the first substrate and the second substrate; a pressing device configured to bond the first and second substrates with a seal material in an evacuated treatment chamber to prepare a bonded substrate, the seal material including a photo-curing adhesive; a hardening device configured to irradiate light to harden the seal material in the bonded substrate; and a controller coupled to the pressing device and the hardening device and programmed to measure the time that elapses after pressing of the first and second substrates is completed and to operate the hardening device to start hardening of the seal material based on the measured elapsed time and a predetermined time needed for completely releasing stress remaining in the first and second substrates in the bonded substrate.