Shape-Distortion Standards for Calibrating Measurement Tools for Nominally Flat Objects
First Claim
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1. A method, comprising:
- fabricating a nominally flat object with a controlled warpage;
making a measurement of the warpage of the nominally flat object, the measurement being traceable through a standard reference material to a fundamental unit of measurement; and
providing the nominally flat object as a reference object for calibrating a measurement tool.
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Abstract
A first nominally flat object is obtained that has a controlled warpage that has been measured in a manner traceable through a standard reference material to a fundamental unit of measurement. A measurement tool is calibrated using the first nominally flat object. After calibrating the measurement tool using the first nominally flat object, the warpage of a plurality of nominally flat objects is measured using the measurement tool, wherein the plurality of nominally flat objects is distinct from the first nominally flat object.
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Citations
23 Claims
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1. A method, comprising:
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fabricating a nominally flat object with a controlled warpage; making a measurement of the warpage of the nominally flat object, the measurement being traceable through a standard reference material to a fundamental unit of measurement; and providing the nominally flat object as a reference object for calibrating a measurement tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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obtaining a first nominally flat object having a controlled warpage that has been measured in a manner traceable through a standard reference material to a fundamental unit of measurement; calibrating a measurement tool using the first nominally flat object; and after calibrating the measurement tool using the first nominally flat object, measuring the warpage of a plurality of nominally flat objects using the measurement tool, wherein the plurality of nominally flat objects is distinct from the first nominally flat object. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. An inspection system, comprising:
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a measurement tool for measuring warpage of nominally flat objects; one or more processors; and memory storing one or more programs for execution by the one or more processors, the one or more programs comprising instructions for; calibrating a measurement tool using a first nominally flat object having a controlled warpage that has been measured in a manner traceable through a standard reference material to a fundamental unit of measurement; and after calibrating the measurement tool using the first nominally flat object, measuring the warpage of a plurality of nominally flat objects using the measurement tool, wherein the plurality of nominally flat objects is distinct from the first nominally flat object.
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Specification