公开(公告)号：US20190080750A1

公开(公告)日：2019-03-14

申请号：US15698812

申请日：2017-09-08

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Shaw-Hung Ku ,  Ta-Wei Lin ,  Cheng-Hsien Cheng ,  Chih-Wei Lee ,  Wen-Jer Tsai

IPC: G11C11/56 ,  G11C16/34

CPC classification number: G11C11/5628 ,  G11C16/3459 ,  G11C2211/5621

Abstract: A method for programming a non-volatile memory and a memory system are provided. Each of multiple cells of the non-volatile memory stores data having at least 2 bits. The method includes the following steps. At least one programming pulse is provided for programming a target cell of the cells. At least one program-verify pulse is provided for verifying whether the target cell is successfully programmed. It is determined that whether a threshold voltage of the target cell is greater than or equal to a program-verify voltage. When the threshold voltage is greater than or equal to the program-verify voltage, the target cell is set as successfully programmed. Next, a post-verifying operation is performed to the successfully programmed cell. The post-verifying operation includes determining whether the threshold voltage of the target cell is greater than or equal to a post-verifying voltage.

公开(公告)号：US10460797B2

公开(公告)日：2019-10-29

申请号：US15698812

申请日：2017-09-08

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Shaw-Hung Ku ,  Ta-Wei Lin ,  Cheng-Hsien Cheng ,  Chih-Wei Lee ,  Wen-Jer Tsai

IPC: G11C16/04 ,  G11C11/56 ,  G11C16/34

Abstract: A method for programming a non-volatile memory and a memory system are provided. Each of multiple cells of the non-volatile memory stores data having at least 2 bits. The method includes the following steps. At least one programming pulse is provided for programming a target cell of the cells. At least one program-verify pulse is provided for verifying whether the target cell is successfully programmed. It is determined that whether a threshold voltage of the target cell is greater than or equal to a program-verify voltage. When the threshold voltage is greater than or equal to the program-verify voltage, the target cell is set as successfully programmed. Next, a post-verifying operation is performed to the successfully programmed cell. The post-verifying operation includes determining whether the threshold voltage of the target cell is greater than or equal to a post-verifying voltage.