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. 26, 2022
Filed:
Mar. 22, 2021
Micron Technology, Inc., Boise, ID (US);
Kalyan Kavalipurapu, Santa Clara, CA (US);
Michele Piccardi, Cupertino, CA (US);
Xiaojiang Guo, San Jose, CA (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
Disclosed are systems and methods of dynamically calibrating a memory control voltage more accurately. According to disclosed implementations, a memory control voltage such as Vpass or Vwlrv may be calibrated during memory operation as a function of the change in slope of total string current, even during increase in the wordline voltage. In one exemplary method, the wordlines are increased in sequence from a start voltage to an end voltage in steps, slope change is measured at every step, the measured slope change is compared against a threshold, and an adjusted memory control voltage is determined as a function of a wordline voltage at which the change in slope reaches the threshold. As such, memory control voltage may be determined and dynamically calibrated with less sensitivity to operating parameters such as temperature, pattern, and/or time of programming.