Electrostatic detecting system and method
First Claim
1. An electrostatic detecting system adapted to detect static electricity generated at an active surface of a substrate on which device is formed, the electrostatic detecting system comprising:
- a sensing apparatus, disposed at least adjacent to a back surface opposite to the active surface of the substrate, for measuring the static electricity generated at the active surface and generating an initial electric signal; and
a signal processing apparatus, electrically connected to the sensing apparatus, for receiving the initial electric signal and correcting the initial electric signal based on a voltage compensation value to obtain a final electric signal so as to compensate for a difference value present in the static electricity measured from the back surface and the active surface of the substrate, and outputting the final electric signal to obtain a voltage distribution on the active surface of the substrate,wherein the voltage compensation value is determined at least by a thickness and a dielectric constant of the substrate, and a distance between the sensing apparatus and the back surface.
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Accused Products
Abstract
An electrostatic detecting system and an electrostatic detecting method for detecting the static electricity generated at an active surface of a substrate are provided. The electrostatic detecting system includes a sensing apparatus and a signal processing apparatus. The sensing apparatus is disposed at least adjacent to a back surface opposite to the active surface of the substrate, for measuring the static electricity generated at the active surface and generating an initial electric signal. The signal processing apparatus is electrically connected to the sensing apparatus, for receiving the initial electric signal and correcting the initial electric signal based on a voltage compensation value to obtain a final electric signal.
13 Citations
16 Claims
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1. An electrostatic detecting system adapted to detect static electricity generated at an active surface of a substrate on which device is formed, the electrostatic detecting system comprising:
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a sensing apparatus, disposed at least adjacent to a back surface opposite to the active surface of the substrate, for measuring the static electricity generated at the active surface and generating an initial electric signal; and a signal processing apparatus, electrically connected to the sensing apparatus, for receiving the initial electric signal and correcting the initial electric signal based on a voltage compensation value to obtain a final electric signal so as to compensate for a difference value present in the static electricity measured from the back surface and the active surface of the substrate, and outputting the final electric signal to obtain a voltage distribution on the active surface of the substrate, wherein the voltage compensation value is determined at least by a thickness and a dielectric constant of the substrate, and a distance between the sensing apparatus and the back surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrostatic detecting method, comprising:
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disposing a sensing apparatus at least adjacent to a back surface opposite to an active surface of a substrate on which a device is formed; by the sensing apparatus, measuring static electricity generated at the active surface and generating an initial electric signal; and by a signal processing apparatus, receiving the initial electric signal and correcting the initial electric signal based on a voltage compensation value to obtain a final electric signal so as to compensate for a difference value present in the static electricity measured from the back surface and the active surface of the substrate, and outputting the final electric signal to obtain a voltage distribution on the active surface of the substrate, wherein the voltage compensation value is determined at least by a thickness and a dielectric constant of the substrate, and a distance between the sensing apparatus and the back surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification