Method and system for determining distortion in a circuit image
First Claim
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1. A method of determining distortion in a image of an integrated circuit, comprising:
- measuring photon emissions for a potential photon emission area within the integrated circuit;
comparing an expected level of photon emission with the measured photon emissions;
predicting an amount of distortion for the potential photon emission areas based on results of comparing the measured photon emissions to the expected photon emission level; and
improving resolution of the image by approximating a photon intensity of adjacent spaced devices;
wherein the potential photon emission area is defined using a layout database.
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Abstract
Embodiments of the invention may reduce timing and spatial distortion in Picosecond Imaging and Circuit Analysis (PICA). In one embodiment, a method of determining distortion in a circuit image comprises: defining potential photon emission areas in the circuit image using a layout database, determining ideal photon emissions over the potential photon emission areas, measuring photon emissions for the potential photon emission areas, comparing the ideal photon emission with the measured photon emissions, and producing a mathematical model that predicts the amount of spatial distortion over the potential photon emission area.
18 Citations
24 Claims
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1. A method of determining distortion in a image of an integrated circuit, comprising:
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measuring photon emissions for a potential photon emission area within the integrated circuit; comparing an expected level of photon emission with the measured photon emissions; predicting an amount of distortion for the potential photon emission areas based on results of comparing the measured photon emissions to the expected photon emission level; and improving resolution of the image by approximating a photon intensity of adjacent spaced devices; wherein the potential photon emission area is defined using a layout database. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of determining distortion in a circuit image, comprising:
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measuring photon emissions for a potential photon emission area; comparing an expected level of photon emission with the measured photon emissions; predicting an amount of distortion for the potential photon emission areas based on results of comparing the measured photon emissions to the expected photon emission level; and forming a composite time-distortion model by weighting the amount of spatial distortion by a time distortion model wherein forming the composite time-spatial distortion model comprises evaluating; wherein the expression λ
E(t−
s)ψ
(s) represents time distortion, f(x, Ex) represents a probability density function (PDF) in the X direction of a circuit image, and f(y, Ey) represents the PDF in the Y direction in the circuit image.
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15. A method of determining distortion in a circuit image, comprising:
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measuring photon emissions for a potential photon emission area; comparing an expected level of photon emission with the measured photon emissions; predicting an amount of distortion for the potential photon emission areas based on results of comparing the measured photon emissions to the expected photon emission level; and improving resolution of the circuit image by approximating a photon intensity of adjacent spaced devices.
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16. A system for determining distortion in an image of an integrated circuit, comprising:
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a storage module comprising a layout database of the integrated circuit that determines potential photon emission areas; a processing module coupled to the storage module and configured to determine an expected level of photon emissions over the potential photon emission areas; and an imaging photomultiplier coupled to the processing module and configured to measure photon emissions for the potential photon emission areas; wherein the processing module compares the expected level of photon emissions to the measured photon emissions and produces a mathematical model that predicts an amount of spatial distortion for each potential photon emission area; wherein the resolution of the image is improved by approximating a photon intensity of adiacent spaced devices within the integrated circuit. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A system for determining distortion in an image of an integrated circuit, comprising:
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a storing means for determining potential photon emission areas from a layout database of the integrated circuit; a processing means for determining an expected level of photon emissions over the potential photon emission areas; and a comparing means for comparing the expected level of photon emissions to a measured level of photon emissions for the potential photon emission areas. - View Dependent Claims (24)
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Specification