Patent ID: 6909998
Filing Date: 2005-06-21
Classification: B82Y,G03F,Y10S

Abstract:
1. An in-situ mold deformation monitoring method for nanoimprint, said method using a database for storing temporary information, and comprising the following steps of: (A) providing a mold, and marking said mold with at least one monitoring mark; (B) installing at least one monitoring device and at least one signal source around said mold; (C) recording a reference pattern in said database before imprinting, said reference pattern being obtained by using said signal source to issue signals to said monitoring marks, and using said monitoring device to receive interference pattern reflected by said monitoring marks, said interference pattern then being transformed into input signal to computers and recorded as said reference pattern in said database; (D) detecting a plurality of interference patterns during a complete imprinting step, transforming said interference patterns into input signals to computers, and recorded in said database; (E) comparing said interference patterns recorded in step (D) with said reference pattern record in step (C); and (F) issuing controlling signals based on the result of the comparison in step (E).