Method and apparatus for verifying a site-dependent wafer
First Claim
1. A method of verifying a Site-Dependent (S-D) wafer comprising:
- receiving a first set of S-D wafers by one or more S-D processing elements in one or more processing subsystems, wherein the one or more S-D processing elements are coupled to one or more S-D transfer subsystems, each wafer having wafer data associated therewith, wherein the wafer data includes historical and/or real-time data;
creating a first set of unverified S-D wafers by performing a first S-D creation procedure using the one or more S-D processing elements, wherein one or more unverified evaluation features are created at a first number of evaluation sites on each of the unverified S-D wafers;
establishing S-D wafer state data for each unverified S-D wafer, wherein the S-D wafer state data comprises a number of required creation sites and a number of required evaluation sites for each unverified S-D wafer;
establishing a first set of evaluation wafers comprising a first number of the unverified S-D wafers, the first set of evaluation wafers being evaluated using a first S-D evaluation procedure;
establishing first operational states for a plurality of S-D evaluation elements in one or more subsystems coupled to the one or more S-D transfer subsystems;
determining a first number of available evaluation elements using the first operational states for one or more of the S-D evaluation elements;
establishing a first S-D transfer sequence using the wafer data, the S-D wafer state data, the first number of S-D evaluation wafers, or the first number of available evaluation elements, or any combination thereof;
transferring the first set of S-D evaluation wafers to the first number of available evaluation elements in one or more evaluation subsystems using the first S-D transfer sequence when the number of S-D evaluation wafers is less than or equal to the first number of available evaluation elements, andapplying a first corrective action when the number of S-D evaluation wafers is greater than the first number of available evaluation elements.
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Abstract
The present invention includes a method of verifying a Site-Dependent (S-D) wafer that includes receiving a first set of S-D wafers by one or more S-D processing elements in one or more processing subsystems, creating a first set of unverified S-D wafers by performing a first S-D creation procedure, establishing S-D wafer state data for each unverified S-D wafer, establishing a first set of evaluation wafers comprising a first number of the unverified S-D wafers, establishing first operational states for a plurality of S-D evaluation elements, determining a first number of available evaluation elements, establishing a first S-D transfer sequence, transferring the first set of S-D evaluation wafers to the first number of available evaluation elements in one or more evaluation subsystems and applying a first corrective action when the number of S-D evaluation wafers is greater than the first number of available evaluation elements.
45 Citations
50 Claims
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1. A method of verifying a Site-Dependent (S-D) wafer comprising:
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receiving a first set of S-D wafers by one or more S-D processing elements in one or more processing subsystems, wherein the one or more S-D processing elements are coupled to one or more S-D transfer subsystems, each wafer having wafer data associated therewith, wherein the wafer data includes historical and/or real-time data; creating a first set of unverified S-D wafers by performing a first S-D creation procedure using the one or more S-D processing elements, wherein one or more unverified evaluation features are created at a first number of evaluation sites on each of the unverified S-D wafers; establishing S-D wafer state data for each unverified S-D wafer, wherein the S-D wafer state data comprises a number of required creation sites and a number of required evaluation sites for each unverified S-D wafer; establishing a first set of evaluation wafers comprising a first number of the unverified S-D wafers, the first set of evaluation wafers being evaluated using a first S-D evaluation procedure; establishing first operational states for a plurality of S-D evaluation elements in one or more subsystems coupled to the one or more S-D transfer subsystems; determining a first number of available evaluation elements using the first operational states for one or more of the S-D evaluation elements; establishing a first S-D transfer sequence using the wafer data, the S-D wafer state data, the first number of S-D evaluation wafers, or the first number of available evaluation elements, or any combination thereof; transferring the first set of S-D evaluation wafers to the first number of available evaluation elements in one or more evaluation subsystems using the first S-D transfer sequence when the number of S-D evaluation wafers is less than or equal to the first number of available evaluation elements, and applying a first corrective action when the number of S-D evaluation wafers is greater than the first number of available evaluation elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of verifying a Site-Dependent (S-D) wafer comprising:
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receiving a S-D wafer and S-D wafer data for the S-D wafer, wherein the S-D wafer comprises a plurality of dies and a number of evaluation sites; establishing a first S-D evaluation procedure for the S-D wafer, the first S-D evaluation procedure including a first number of evaluation sites; determining a first processing time for the first S-D evaluation procedure; comparing the first processing time to a first time limit; establishing a first updated S-D evaluation procedure for the first S-D wafer, wherein one or more new evaluation sites are added to the first S-D evaluation procedure when the first processing time is less than the first time limit for the first S-D wafer, wherein a number of an evaluation procedure is increased for the first S-D wafer by establishing a first new prioritized S-D evaluation site for the first S-D wafer; establishing a first updated S-D transfer sequence for the first S-D wafer using a first updated S-D processing sequence; establishing a second updated S-D processing sequence for the first S-D wafer, wherein one or more S-D evaluation sites are removed from the first S-D processing sequence when the first processing time is greater than the first time limit for the first S-D wafer, wherein the number of evaluation sites is decreased for the first S-D wafer by removing one or more de-prioritized evaluation sites for the first S-D wafer; and establishing a second updated S-D transfer sequence for the first S-D wafer using the second updated S-D processing sequence.
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29. A system for verifying a Site-Dependent (S-D) wafer comprising:
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one or more S-D processing elements in one or more processing subsystems configured for receiving a first set of S-D wafers, wherein the one or more S-D processing elements are coupled to one or more S-D transfer subsystems, wherein the one or more S-D processing elements are configured for performing a first S-D creation procedure, wherein one or more unverified evaluation features are created at a first number of evaluation sites on each unverified S-D wafer; and one or more controllers coupled to the one or more S-D processing elements in the one or more processing subsystems and to the one or more S-D transfer subsystems, wherein at least one controller is configured to establish S-D wafer state data for each unverified S-D wafer, wherein the S-D wafer state data comprises a number of required creation sites and a number of required evaluation sites for each unverified S-D wafer, to establish a first set of evaluation wafers comprising a first number of the unverified S-D wafers, the first set of evaluation wafers being evaluated using a first S-D evaluation procedure, to establish first operational states for a plurality of S-D evaluation elements in one or more subsystems coupled to the one or more S-D transfer subsystems, to determine a first number of available evaluation elements using the first operational states for one or more of the S-D evaluation elements, to establish a first S-D transfer sequence using wafer data, the S-D wafer state data, a first number of S-D evaluation wafers, or a first number of available evaluation elements, or any combination thereof, and to apply a first corrective action when the number of S-D evaluation wafers is greater than the first number of available evaluation elements, wherein the one or more S-D transfer subsystems are configured for transferring the first set of S-D evaluation wafers to the first number of available evaluation elements in the one or more evaluation subsystems using the first S-D transfer sequence when the number of S-D evaluation wafers is less than or equal to the first number of available evaluation elements.
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30. A method of verifying a Site-Dependent (S-D) wafer comprising:
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receiving a first S-D wafer using a S-D transfer system; transferring the first S-D wafer to a first S-D processing element using the S-D transfer system; creating one or more unverified S-D wafers, wherein one or more S-D unverified evaluation features are created at one or more sites on a first S-D unverified wafer using a first S-D creation procedure; determining a first S-D evaluation wafer using the one or more unverified S-D wafers; transferring the first S-D evaluation wafer to a first S-D evaluation element using the S-D transfer system; establishing first confidence data for the first S-D evaluation wafer using a first S-D evaluation procedure, wherein a S-D unverified evaluation feature at a first site on the first S-D evaluation wafer is evaluated; comparing the first confidence data for the first S-D evaluation wafer to first confidence limits; identifying the first unverified evaluation feature as a high confidence feature having a first level of confidence associated therewith and identifying the first S-D evaluation wafer as a high confidence wafer having the first level of confidence associated therewith, when a first confidence limit is met; and applying a first corrective action when the first confidence limit is not met. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification