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Browse Prior Art Database

Accurate Graphics Measurement Routine

IP.com Disclosure Number: IPCOM000046870D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Boyle, DH: AUTHOR

Abstract

A computer program is disclosed to provide the measurement of distances between two corners of two polygons in a computer-assisted design program for generating shapes for an integrated circuit layout. The program provides an accurate, fast measurement of geometries in an area as large as a 150x150 mm window for an approximate 1-micron integrated circuit geometry. The program includes graphical marks which show which corners are detected. An error feedback is provided to the user if the polygon corner is not within the range criterion of the program. The output of the program is in the form of a delta X and a delta Y which are shown on a separate alphanumeric screen which is an integral part of the design automation system.

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Accurate Graphics Measurement Routine

A computer program is disclosed to provide the measurement of distances between two corners of two polygons in a computer-assisted design program for generating shapes for an integrated circuit layout. The program provides an accurate, fast measurement of geometries in an area as large as a 150x150 mm window for an approximate 1-micron integrated circuit geometry. The program includes graphical marks which show which corners are detected. An error feedback is provided to the user if the polygon corner is not within the range criterion of the program. The output of the program is in the form of a delta X and a delta Y which are shown on a separate alphanumeric screen which is an integral part of the design automation system. Conventionally, a ruler function is used in a computer-assisted design program for laying out integrated circuits. Fig. 1 illustrates the improvement provided by the disclosed program invention, in which two corner marks for two separate polygons can be indicated by the light pen and the program will then provide the delta X and delta Y distance between the two marks. The flow diagram for the program is shown in Fig. 2. The invention is a method of measuring the distance between two corners of two polygons on a graphics display tube. The corners need not be on the same polygon. This permits the accurate measurement of the spacing, width, length and overlap of these graphic features. The invention permits accurate, fast ...