Method for repairing light mask image

Abstract

The invention discloses the method of mending photo mask graph; the original reference pattern which is in the same X axle and the same Y axle of defect pattern and has the same size of the defect pattern is found on a photo mask base board by software; reference pattern is collected and output by the way that Window is mended and defect pattern direction is gradually closed to, which makes the positioning of the defect pattern is relatively accurate; furthermore, the scope of non-defect pattern with the same size of the defect pattern is widened; the probability of finding the non-defect original reference pattern with the same size of defect pattern is increased; the non-defect original reference pattern is copied and taken as the reference pattern; the defect pattern is mended by the way that the reference pattern is referred to, which eliminates the requirement of remanufacturing the photo mask and reduces the production cost of the photo mask.

Description

technical field [0001] The invention relates to a method for making a photomask, in particular to a method for repairing photomask patterns. Background technique [0002] With the miniaturization of the semiconductor manufacturing process, the degree of integration of semiconductor components is getting higher and higher, and the production of photomasks, which is one of the key technologies of semiconductors, is becoming more and more important. [0003] The quality of the photomask directly affects the quality of subsequent semiconductor devices, which ultimately leads to a reduction in the yield of semiconductor manufacturing. Therefore, a variety of micro-repair techniques have been developed to repair the errors of the mask pattern, so as to reduce the need for re-making the mask, reduce the cost of the mask, and improve the quality of subsequent semiconductor devices. [0004] The photomask manufacturing process is shown in Figure 1. Usually, a layer of chrome film is...

AI Technical Summary

Problems solved by technology

[0009] The problem solved by the present invention is to provide a method for repairing the pattern of the photomask to prevent inaccurate positioning when repairing the defective pattern, and because no suitable non-defective pattern can be found within the range of the viewing window as a reference pattern to repair the defective pattern, resulting in the Masks are unusable and must be re-fabricated, resulting in higher mask costs

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