发明名称 |
Method for operating non-volatile memory device and memory controller |
摘要 |
An operating method for a non-volatile memory device includes applying first and second read voltages to a first word line to perform a read operation; counting first memory cells each having a threshold voltage belonging to a first voltage range between the first read voltage and the second read voltage; applying a third read voltage to the first word line sequentially after applying the second read voltage to count second memory cells each having a second threshold voltage belonging to a voltage range between the second read voltage and the third read voltage; comparing the number of first memory cells counted and the number of second memory cells counted; determining a fourth read voltage based on a result of the comparing; and applying the fourth read voltage to the first word line sequentially after applying the third read voltage. |
申请公布号 |
US9117536(B2) |
申请公布日期 |
2015.08.25 |
申请号 |
US201314088511 |
申请日期 |
2013.11.25 |
申请人 |
Samsung Electronics Co., Ltd. |
发明人 |
Yoon Hyun Jun;Jeong Jaeyong;Choi Myung-Hoon;Park Kitae |
分类号 |
G11C11/34;G11C16/26;G11C11/56;G11C16/04;G11C16/34 |
主分类号 |
G11C11/34 |
代理机构 |
Volentine & Whitt, PLLC |
代理人 |
Volentine & Whitt, PLLC |
主权项 |
1. A method of operating a non-volatile memory device, the method comprising:
employing a voltage generator to apply first and second read voltages to a first word line of the memory device to perform a read operation; counting first memory cells of the memory device each having a threshold voltage belonging to a first voltage range between the first read voltage and the second read voltage; employing the voltage generator to apply a third read voltage to the first word line sequentially after applying the second read voltage to count second memory cells of the memory device each having a threshold voltage belonging to a second voltage range between the second read voltage and the third read voltage; comparing a number of the first memory cells counted and a number of the second memory cells counted; determining a fourth read voltage based on a result of the comparing; and employing the voltage generator to apply the fourth read voltage to the first word line sequentially after applying the third read voltage. |
地址 |
Suwon-si, Gyeoggi-do KR |