Patent ID: 9589086
Date: 2017-03-07
CPC Classifications: G02B,G06F,H01J

Claim:
1. A method for measuring a surface structure of a chip or a wafer, comprising: using an instrument to obtain an image of the surface structure of the chip, wherein the instrument comprises a critical dimension scanning electron microscope (CD-SEM), an electron-beam (E-Beam) inspection tool, a SEM review took, a bright-field inspection tool with wavelength 150-800 nm, or a dark-field inspection took with laser light source; performing an image extraction on the image by using a processor to convert the extracted image into a first circuit design file; selecting a standard image to convert into a second circuit design file; comparing at least one target image in the image and the standard image to obtain a difference between the target image and the standard image; and making data of the surface structure according to the difference, wherein the data comprise at least one of a line edge roughness (LER), a line width roughness (LWR), a contact edge roughness (CER), a critical dimension (CD), a bias, 3 sigma, maximum, minimum, or a repeating defect.