The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2026
Filed:
Feb. 10, 2023
United Semiconductor (Xiamen) Co., Ltd., Xiamen, CN;
Qiao Lin Chen, Shamen City, CN;
Ching-Shu Lo, Singapore, SG;
Yan Cai, Singapore, SG;
Tsung Che Lin, Singapore, SG;
Wen Yi Tan, Xiamen, CN;
United Semiconductor (Xiamen) Co., Ltd., Xiamen, CN;
Abstract
A method for wafer image equalization includes obtaining a wafer image, converting the wafer image into bitmap data, generating a grayscale distribution of RGB pixels according to the bitmap data, generating a grayscale cumulative probability distribution of the RGB pixels according to the grayscale distribution, generating a mapping function according to the grayscale cumulative probability distribution of the RGB pixels, converting the grayscale distribution of the RGB pixels by the mapping function into an equalized grayscale distribution of the RGB pixels, and generating an equalized wafer image according to the equalized grayscale distribution of the RGB pixels.