Patent ID: 9588415
Date: 2017-03-07
CPC Classifications: G03F,H01J

Claim:
1. An exposure system, comprising: a data processing part of a processing unit that forms an exposure layout from a design layout stored at a data storage device and retrieved from the data storage device by the data processing unit; and an exposure part that irradiates an electron beam at a photoresist layer according to the exposure layout, wherein the data processing part of the processing unit is constructed and arranged to generate a control parameter of the exposure part obtained from the exposure layout for driving the exposure part without a pattern position error and a beam drift error and to prevent a discrepancy between the exposure layout and a mask layout to be formed in the photoresist layer; wherein the exposure part is controlled by a controlling part of the processing unit according to the control parameter; wherein the data processing part of the processing unit calculates a shot density of the exposure layout, the shot density used to prevent the pattern position error and the beam drift error; wherein the data processing part of the processing unit calculates the control parameter from the shot density; and wherein the shot density includes an area occupied by the layout patterns per a unit area of the exposure layout.