POWER RAIL WITH NON-LINEAR EDGE
First Claim
1. A method, comprising:
- selecting a power rail of a cell;
determining that a clearance distance for an electrical connection to or around the power rail is not sufficient to fit the electrical connection;
selecting a power rail portion of the power rail for modification; and
modifying a shape of the power rail portion to provide a clearance distance sufficient to fit the electrical connection.
1 Assignment
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Accused Products
Abstract
A method for designing an integrated circuit includes steps of selecting a power rail of a cell, determining that a clearance distance for an electrical connection to or around the power rail is not sufficient to fit the electrical connection, selecting a power rail portion of the power rail for modification, and modifying a shape of the power rail portion to provide a clearance distance sufficient to fit the electrical connection. As clearance distances between features in an interconnection structure of an integrated circuit become smaller, manufacturing becomes more difficult and error-prone. Increasing clearance distances improves manufacturability of an integrated circuit. Modifying the shape of an integrated circuit power rail increases clearance distance to and/or around a power rail.
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Citations
20 Claims
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1. A method, comprising:
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selecting a power rail of a cell; determining that a clearance distance for an electrical connection to or around the power rail is not sufficient to fit the electrical connection; selecting a power rail portion of the power rail for modification; and modifying a shape of the power rail portion to provide a clearance distance sufficient to fit the electrical connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An integrated circuit, comprising:
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a source/drain (S/D) line in a cell of the integrated circuit; a power rail extending over the S/D line, wherein the power rail comprises a first power rail portion and a second power rail portion, and an inner edge of the first power rail portion is offset from an inner edge of the second power rail portion; and a conductive line over the power rail. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An integrated circuit, comprising
a cell having a source or drain line in a first layer; -
a first power rail over the source or drain line in a second layer; and a conductive line over the power rail, wherein the first power rail is discontinuous across a length of the cell. - View Dependent Claims (18, 19, 20)
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Specification