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:
Nov. 18, 2025
Filed:
Sep. 13, 2023
Applicant:
SK Hynix Inc., Icheon-si, KR;
Inventors:
Assignee:
SK hynix Inc., Icheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 29/10 (2006.01);
U.S. Cl.
CPC ...
G11C 29/10 (2013.01);
Abstract
Provided herein is a method of measuring a refractive index of a semiconductor memory device and a method of classifying a product group of a semiconductor memory device using the same. The method of measuring a refractive index of a semiconductor memory device includes measuring a positive breakdown voltage and a negative breakdown voltage of each of memory cells coupled to a selected word line. The method also includes checking a refractive index of a charge storage layer of each of the memory cells based on the measured positive breakdown voltage and the measured negative breakdown voltage.