Global Patent Index - EP 1256117 A1

EP 1256117 A1 2002-11-13 - METHOD TO PROVIDE A REDUCED CONSTANT E-FIELD DURING ERASE OF EEPROMS FOR RELIABILITY IMPROVEMENT

Title (en)

METHOD TO PROVIDE A REDUCED CONSTANT E-FIELD DURING ERASE OF EEPROMS FOR RELIABILITY IMPROVEMENT

Title (de)

VERFAHREN ZUR HERVORBRINGUNG EINES KONSTANTEN FELDES MIT GERINGER ELEKTIZITÄT WÄHREND DES LÖSCHENS EINES EEPROMS ZUR ZUVERLÄSSIGKEITSVERBESSERUNG

Title (fr)

PROCEDE DESTINE A FOURNIR UN CHAMP ELECTRIQUE CONSTANT REDUIT DURANT L'EFFACEMENT DE MEMOIRES DE TYPE EEPROM AFIN D'AMELIORER LEUR FIABILITE

Publication

EP 1256117 A1 (EN)

Application

EP 00983940 A

Priority

  • US 0033044 W
  • US 17232799 P
  • US 49035100 A

Abstract (en)

[origin: WO0145113A1] A method to reduce the peak electric field during erase of a memory device composed of multiple memory cells. The electric field Efield of the memory cell during erase is determined by the equation Efield SIMILAR <i>a</i>g(Vgate - Vth) + Vtuv + (<i>a</i>s -1)Vsource and varying gate voltages Vgate are applied to the gate of the cell being erased so that the Vgate - Vth is constant during the erase procedure.

IPC 1-7 (main, further and additional classification)

G11C 16/14

IPC 8 full level (invention and additional information)

G11C 16/02 (2006.01); G11C 16/14 (2006.01); H01L 21/8247 (2006.01); H01L 27/115 (2006.01); H01L 29/788 (2006.01); H01L 29/792 (2006.01)

CPC (invention and additional information)

G11C 16/14 (2013.01)

Citation (search report)

See references of WO 0145113A1

Designated contracting state (EPC)

AT BE CH CY DE FR GB LI NL

EPO simple patent family

WO 0145113 A1 20010621; CN 1411602 A 20030416; EP 1256117 A1 20021113; JP 2003517176 A 20030520; JP 4641697 B2 20110302; KR 100655944 B1 20061211; KR 20030011066 A 20030206

INPADOC legal status


2007-09-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040701

2004-05-19 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AT BE CH CY DE FR GB LI NL

2002-11-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020716

2002-11-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-11-13 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI