TW200737207A - Reverse coupling effect with timing information - Google Patents

Reverse coupling effect with timing information

Info

Publication number
TW200737207A
TW200737207A TW095141514A TW95141514A TW200737207A TW 200737207 A TW200737207 A TW 200737207A TW 095141514 A TW095141514 A TW 095141514A TW 95141514 A TW95141514 A TW 95141514A TW 200737207 A TW200737207 A TW 200737207A
Authority
TW
Taiwan
Prior art keywords
memory cell
programmed
neighbor
timing information
coupling effect
Prior art date
Application number
TW095141514A
Other languages
Chinese (zh)
Other versions
TWI315068B (en
Inventor
Jian Chen
Original Assignee
Sandisk Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/271,241 external-priority patent/US7289344B2/en
Priority claimed from US11/272,335 external-priority patent/US7289348B2/en
Application filed by Sandisk Corp filed Critical Sandisk Corp
Publication of TW200737207A publication Critical patent/TW200737207A/en
Application granted granted Critical
Publication of TWI315068B publication Critical patent/TWI315068B/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
    • G11C11/5621—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge storage in a floating gate
    • G11C11/5642—Sensing or reading circuits; Data output circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
    • G11C11/5621—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge storage in a floating gate
    • G11C11/5628—Programming or writing circuits; Data input circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/04—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
    • G11C16/0483—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells having several storage transistors connected in series
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/10—Programming or data input circuits
    • G11C16/12—Programming voltage switching circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/26—Sensing or reading circuits; Data output circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
    • G11C16/3418—Disturbance prevention or evaluation; Refreshing of disturbed memory data

Abstract

Shifts in the apparent charge stored on a floating gate (or other charge storing element) of a non-volatile memory cell can occur because of the coupling of an electric field based on the charge stored in neighboring floating gates (or other neighboring charge storing elements). The problem occurs most pronouncedly between sets of adjacent memory cells that have been programmed at different times. To compensate for this coupling, the read process for a given memory cell will take into account the programmed state of a neighbor memory cell if the neighbor memory cell was programmed subsequent to the given memory cell. Techniques for determining whether the neighbor memory cell was programmed before or after the given memory cell are disclosed.
TW95141514A 2005-11-10 2006-11-09 Reverse coupling effect with timing information TWI315068B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/271,241 US7289344B2 (en) 2005-11-10 2005-11-10 Reverse coupling effect with timing information for non-volatile memory
US11/272,335 US7289348B2 (en) 2005-11-10 2005-11-10 Reverse coupling effect with timing information

Publications (2)

Publication Number Publication Date
TW200737207A true TW200737207A (en) 2007-10-01
TWI315068B TWI315068B (en) 2009-09-21

Family

ID=37831516

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95141514A TWI315068B (en) 2005-11-10 2006-11-09 Reverse coupling effect with timing information

Country Status (5)

Country Link
EP (1) EP1946325A1 (en)
JP (1) JP4938020B2 (en)
KR (1) KR101016432B1 (en)
TW (1) TWI315068B (en)
WO (1) WO2007058846A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7936599B2 (en) * 2007-06-15 2011-05-03 Micron Technology, Inc. Coarse and fine programming in a solid state memory
KR101411976B1 (en) * 2007-07-09 2014-06-27 삼성전자주식회사 Flash memory system and error correction method thereof
US8499229B2 (en) 2007-11-21 2013-07-30 Micro Technology, Inc. Method and apparatus for reading data from flash memory
US7633798B2 (en) * 2007-11-21 2009-12-15 Micron Technology, Inc. M+N bit programming and M+L bit read for M bit memory cells
KR101368694B1 (en) * 2008-01-22 2014-03-03 삼성전자주식회사 Apparatus and method of memory programming
JP5562329B2 (en) * 2008-07-01 2014-07-30 エルエスアイ コーポレーション Method and apparatus for interfacing between a flash memory controller and a flash memory array
US7983078B2 (en) * 2008-09-24 2011-07-19 Sandisk Technologies Inc. Data retention of last word line of non-volatile memory arrays
KR20100093885A (en) 2009-02-17 2010-08-26 삼성전자주식회사 Nonvolatile memory device, operating method thereof and memory system including the same
KR101212387B1 (en) 2011-01-03 2012-12-13 에스케이하이닉스 주식회사 Method of reading a semiconductor memory device
US10910061B2 (en) * 2018-03-14 2021-02-02 Silicon Storage Technology, Inc. Method and apparatus for programming analog neural memory in a deep learning artificial neural network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542407B1 (en) * 2002-01-18 2003-04-01 Sandisk Corporation Techniques of recovering data from memory cells affected by field coupling with adjacent memory cells
JP3913704B2 (en) * 2003-04-22 2007-05-09 株式会社東芝 Nonvolatile semiconductor memory device and electronic device using the same
US7372730B2 (en) * 2004-01-26 2008-05-13 Sandisk Corporation Method of reading NAND memory to compensate for coupling between storage elements

Also Published As

Publication number Publication date
EP1946325A1 (en) 2008-07-23
KR101016432B1 (en) 2011-02-21
JP4938020B2 (en) 2012-05-23
KR20080080529A (en) 2008-09-04
JP2009516318A (en) 2009-04-16
TWI315068B (en) 2009-09-21
WO2007058846A1 (en) 2007-05-24

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees