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Pattern forming method and semiconductor device manufactured by using said pattern forming method

Image Number 6 for United States Patent #7482661.

A pattern forming method includes determining an allowable value of an etching conversion difference, obtaining a maximum distance between patterns generating the etching conversion difference within the allowable value, the patterns including main patterns or both main patterns and a dummy pattern, preparing a first design layout in which a first distance between the main patterns is smaller than the maximum distance, or a second design layout in which a second distance between the main patterns and the dummy pattern is smaller than the maximum distance, performing a design data conversion based on the first or second design layout to form first or second design data, and forming the main patterns by using the first design data, or forming both the main patterns and the dummy pattern by using the second design data.

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