Patent ID: 7413765

Claim:
A film-forming method for forming a planar periodic structure having a predetermined periodicity by depositing liquid material on an object, the method comprising: providing liquid drop supplying means capable of supplying a liquid drop at a predetermined driving period to deposit the liquid material on the object; controlling the presence or absence of the supply of the liquid drop by the liquid drop supplying means at each driving period of the driving period in accordance with the periodicity of the planar periodic structure to be formed on the object; and supplying the liquid drop by the control of the liquid drop supplying means while the liquid drop supplying means is scanned at a predetermined scanning speed in a predetermined scanning direction relative to the object; wherein a natural number times a value obtained by multiplying the driving period and the scanning speed is set to be the structural period of the planar periodic structure, to be formed on the object, in the scanning direction.