Patent ID: 7303703

Claim:
An apparatus for monitoring mold deformation in nano-imprint, comprising: a mold body having a first surface and an opposite second surface, imprinting patterns being formed in areas of the second surface; an electrostatic plate capacitor comprising first and second metal film electrodes respectively embedded in the first and second surfaces of the mold body and spaced a distance from each other and a metal lead embedded in the mold body and connecting the first and second metal film electrodes; a detection device detecting a capacitance of the electrostatic plate capacitor and comprising means for converting the capacitance into an amount of deformation of the mold body; and an external monitoring device receiving a signal representing the amount of deformation from the detection device and selectively recording and displaying the amount of deformation and comprising means for comparing the amount of deformation with a reference to determine if the amount of deformation exceeds the reference and selectively issuing a warning and shutting down the system.