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:
Apr. 16, 2024
Filed:
Sep. 01, 2021
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Abstract
The disclosure provides a wafer searching method and device. The method includes: obtaining a target wafer and a reference wafer; determining a first specific area in the target wafer, and obtaining a first significant distribution feature of the first specific area; determining a second specific area in the reference wafer, and obtaining a second significant distribution feature of the second specific area; in response to determining that the first significant distribution feature corresponds to the second significant distribution feature, estimating a fail pattern similarity between the first specific area and the second specific area; in response to determining that the fail pattern similarity is greater than a threshold, providing the reference wafer as a search result corresponding to the target wafer.