Patent ID: 7024925

Claim:
A 3-axis straight line motion stage comprising: a bottom plate having a predetermined area and thickness; an X-axis stage fixed in a reference area of the bottom plate for moving in the direction of the X-axis, a first X area positioned from the reference area to the direction of the X-axis; a Y-axis stage, positioned within the first X area and fixed in a second X area, which is located within the first X area for moving in the direction of the Y-axis a second Y area positioned from the second X area to the direction of the Y-axis; and a Z-axis stage fixed in the second Y area, which is located within the first Y area and supports a predetermined sample for moving the sample in the direction of the Z-axis; the X-axis stage comprising: a piezoelectric element having a predetermined length, the length being changed in the direction of the Y-axis according to an input voltage; and a first X driving part and a second X driving part connected to both ends of a longitudinal direction of the piezoelectric element, respectively, for moving in the X-axis direction a second X end within the first X area from a first X end within the reference area in the center of the piezoelectric element according to driving of the piezoelectric element, wherein the X-axis, the Y-axis and the Z-axis indicate axes of rectangular coordinates, respectively.