Method for generating post-OPC layout in consideration of top loss of etch mask layer
First Claim
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1. A method of forming a semiconductor circuit, comprising:
- receiving target layout data using an apparatus;
performing an optical proximity correction process on the target layout data and generating post-OPC layout data therefrom;
performing a patterning process using the post-OPC layout data,wherein the post-OPC layout data is adjusted to compensate for a top loss of an etch mask layer that occurs in an etching process that is performed using the etch mask layer;
calculating a threshold light amount of the etch mask layer, wherein the threshold light amount is selected to prevent the etch mask layer from being removed in the etching process; and
calculating a threshold background light intensity of the etch mask layer based on the threshold light amount, wherein the threshold background light intensity is a light intensity when the amount of background light that leaks from an exposed region of the etch mask layer to an unexposed region is substantially equal to the threshold light amount.
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Abstract
A method of forming a semiconductor circuit includes receiving target layout. An optical proximity correction process is performed on the target layout data to generate a post-OPC layout. A patterning process is performed using the post-OPC layout. The post-OPC layout may be adjusted to compensate for a top loss of an etch mask layer.
57 Citations
5 Claims
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1. A method of forming a semiconductor circuit, comprising:
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receiving target layout data using an apparatus; performing an optical proximity correction process on the target layout data and generating post-OPC layout data therefrom; performing a patterning process using the post-OPC layout data, wherein the post-OPC layout data is adjusted to compensate for a top loss of an etch mask layer that occurs in an etching process that is performed using the etch mask layer; calculating a threshold light amount of the etch mask layer, wherein the threshold light amount is selected to prevent the etch mask layer from being removed in the etching process; and calculating a threshold background light intensity of the etch mask layer based on the threshold light amount, wherein the threshold background light intensity is a light intensity when the amount of background light that leaks from an exposed region of the etch mask layer to an unexposed region is substantially equal to the threshold light amount. - View Dependent Claims (2, 3, 4, 5)
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