Characterizing dies
First Claim
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1. A method to characterize a die, comprising:
- measuring a quality metric of the die during a wafer sort stage;
determining, prior to a final test stage, whether the quality metric of the die satisfies a first constraint, wherein the first constraint is more stringent than a second constraint at the final test stage for the quality metric of the die;
selecting a die to be packaged based upon the measuring of the quality metric of the die during the wafer sort stage;
establishing that the packaged die satisfies the second constraint at the final test stage based upon the determination that the die satisfies the first constraint during the wafer sort stage.
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Abstract
An embodiment of a method to characterize a die is disclosed. The embodiment of the method includes measuring a quality metric of the die, and determining, prior to a final test stage, whether the quality metric of the die satisfies a first constraint, where the first constraint is more stringent than a second constraint at the final test stage for the quality metric of the die.
25 Citations
20 Claims
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1. A method to characterize a die, comprising:
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measuring a quality metric of the die during a wafer sort stage; determining, prior to a final test stage, whether the quality metric of the die satisfies a first constraint, wherein the first constraint is more stringent than a second constraint at the final test stage for the quality metric of the die; selecting a die to be packaged based upon the measuring of the quality metric of the die during the wafer sort stage; establishing that the packaged die satisfies the second constraint at the final test stage based upon the determination that the die satisfies the first constraint during the wafer sort stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device, comprising:
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a measuring unit to measure a quality metric of a die during a wafer sort stage; and a characteristic checking unit, coupled to the measuring unit, to determine, prior to a final test stage, whether the quality metric of the die satisfies a first constraint, wherein the first constraint is more stringent than a second constraint at the final test stage for the quality metric of the die, and the die is established as satisfying the second constraint as a packaged die at the final test stage if the die satisfies the first constraint during the wafer sort stage. - View Dependent Claims (12, 13, 14)
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15. A method to reduce inventory costs, comprising:
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characterizing a die based on whether a quality metric of the die satisfies a first constraint at a wafer sort stage, wherein the first constraint is more stringent than a second constraint at a final test stage for the quality metric of the die; establishing that the die will satisfy the second constraint at a final test stage if the die satisfies the first constraint during the wafer sort stage; dicing a wafer that includes the die; binning the die based on the quality metric of the die; and selecting the die from the die bank to be packaged based upon the characterization that the quality metric of the die satisfies the first constraint at the wafer sort stage; wherein the packaged die is established as satisfying the second constraint at the final test stage if the die satisfies the first constraint during the wafer sort stage. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification