Patent ID: 8089851

Claim:
A driving apparatus comprising: a fixed part having a fixed-part plane; and a driven part having a driven-part plane, which faces the fixed-part plane, and driven in a direction substantially parallel to the fixed-part plane, a liquid lubricant being between the fixed-portion plane and the driven-part plane, the driven-part plane facing the fixed-part plane such that the driven-part plane is substantially parallel to the fixed-part plane, wherein there is a balance among (i) a surface tension that driven-part plane receives in a direction of crossing the driven-part plane from the lubricant, (ii) a repulsion that the driven-part plane receives in a direction of crossing the driven-part plane from the lubricant, and (iii) a force that the driven-part plane receives in the direction of crossing the driven-part plane from an element other than the lubricant, and wherein each of said fixed part and said driven part is formed of a same substrate.