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:
Oct. 06, 2020
Filed:
Oct. 29, 2019
Macronix International Co., Ltd., Hsinchu, TW;
Yu-Hung Huang, Tainan, TW;
Cheng-Hsien Cheng, Yunlin County, TW;
Shaw-Hung Ku, Hsinchu, TW;
Yin-Jen Chen, Hsinchu County, TW;
MACRONIX INTERNATIONAL CO., LTD., Hsinchu, TW;
Abstract
A method for determining quick-pass-write (QPW) operation in increment-step-program-pulse (ISPP) operation is provided. The QPW operation is simultaneously applying a bit line voltage during the ISPP operation. The method includes, according to bit line voltages varying in a first range and voltage difference values varying in a second range with respect to a verified voltage, estimating a shrinkage quantity of threshold voltage distribution width at each bit line voltage and each voltage difference value, so as to obtain a shrinkage-quantity topographic contour. According to the bit line voltages and the voltage difference values, a program shot number as needed to achieve the verified voltage is estimated, so as to obtain a program-shot-number topographic contour. The shrinkage-quantity topographic contour and the program-shot-number topographic contour are overlapped to determine an operation region formed from an application range of the bit line voltage and an application range of the voltage difference value.