Patent ID: 8133338

Claim:
A method of manufacturing a stack structure provided with a plurality of substrates including at least a first substrate, a second substrate including glass, and a third substrate, the method comprising: applying a first electric field acting in a direction between the first and second substrates to bond a first bonding film located between one surface of the first substrate and one surface of the second substrate to oxygen atoms in the glass in the second substrate, and to effect anodic bonding of the first and second substrates to each other in such a manner as to incorporate alkali components in the glass in the second substrate into a first buffer film provided on the other surface of the second substrate; and applying a second electric field acting in the same direction as the first electric field, between the second substrate and the third substrate, the third substrate including glass, to bond a second bonding film which is located between the other surface of the second substrate and one surface of the third substrate, to oxygen atoms in the glass of the third substrate, and to effect anodic bonding of the second and third substrates in such a manner as to incorporate alkali components in the glass of the third substrate into a second buffer film provided on the other surface of the third substrate.