Electron beam apparatus and method of generating an electron beam irradiation pattern
View Patent ↗High-contrast exposure is performed by use of a small dose of electron beams, a pattern is formed on a wafer with high accuracy, and high-precision inspection is performed. In pattern formation, proximity effect correction processing is performed. Moreover, exposure of electron beams is performed based on a result of filtering using an inverse characteristic of exposure characteristics of the electron beams. Furthermore, in pattern inspection, electron beams are irradiated based on a result of filtering for obtaining a peripheral region of an edge of the pattern formed.
1. An electron beam apparatus which irradiates finely focused electron beams onto a sample, detects a sample signal emitted from the sample, and observes a shape of a sample surface, comprising:
edge determination means for determining an edge of a pattern drawn on a sample;
means for obtaining a peripheral region of the determined edge; and
means for controlling a dose of electron beams so as to differ between the obtained peripheral region and those other than the peripheral region.
2. The electron beam apparatus according to claim 1 , further comprising:
means for storing information on a graphic drawn on the sample,
wherein the edge determination means obtains the edge of the pattern drawn on the sample from the information on the graphic.
3. The electron beam apparatus according to claim 1 , wherein the edge determination means obtains the edge of the pattern drawn on the sample from an image obtained by previously scanning on the sample with a given electron beam dose.