Patent ID: 6535829
Filing Date: 2003-03-18
Classification: G03F

Abstract:
A system for calculating exposure energy, the system comprising:an exposure apparatus; and a control mean, electrically connected to the exposure apparatus; wherein the control mean executes an exposure energy calculation program according to mask test data and a critical dimension (CD) specification to calculate the exposure energy, and outputs the exposure energy to the exposure apparatus, the mask test data comprises an actual transparency percentage parameter, and a mask error, the CD specification comprises at least a basic transparency percentage parameter, a transparency constant (Tc), a CD energy constant (Cc), and a basic exposure energy, the exposure energy calculation program comprises: (a) subtracting the basic transparency percentage parameter from the actual transparency percentage parameter, and multiplying together the resulting difference with the transparency constant (Tc) parameter to calculate a transparency percentage difference energy; (b) multiplying together the CD energy constant (Cc) parameter with the mask error parameter to calculate a mask error energy; (c) calculating the summation of the transparency percentage difference energy, the mask error energy, and the basic exposure energy so as to calculate the exposure energy.