Patent ID: 8496767

Claim:
An anodic bonding method for anodically bonding a first substrate and a second substrate, the method comprising: a substrate placement step in which the first substrate and the second substrate are stacked and placed on a flat surface of a base with a surface of the first substrate in contact with the flat surface of the base, the second substrate comprising an optically transparent material; a jig placement step, following the substrate placement step, in which an anodic bonding jig comprising a single piece of hard glass is placed in intimate contact with a surface of the second substrate, the anodic bonding jig having a visual checking area that allows visible light to pass through; an alignment step in which the relative positional relation between the first substrate and the second substrate is adjusted based on visible light passing through the visual checking area and the second substrate so that pairs of marks provided on the first substrate and the second substrate will be in a predetermined positional relation; a pressurizing step in which the base and the anodic bonding jig are pressurized to move the base and the anodic bonding jig close to each other, sandwiching the first substrate and the second substrate therebetween; and an application step in which a DC voltage is applied between the first substrate and the second substrate by applying a contact electrode to the second substrate through a notch in a perimeter portion of the anodic bonding jig.