Global Patent Index - EP 1340262 A2

EP 1340262 A2 20030903 - POLY FUSE ROM WITH MOS DEVICE BASED CELL STRUCTURE AND THE METHOD FOR READ AND WRITE THEREFORE

Title (en)

POLY FUSE ROM WITH MOS DEVICE BASED CELL STRUCTURE AND THE METHOD FOR READ AND WRITE THEREFORE

Title (de)

ROM AUS MEHREREN SICHERUNGEN MIT AUF MOS ANORDNUNG BASIERNDER ZELLSTRUKTUR UND LESE- UND SCHREIBVERFAHREN DAFÜR

Title (fr)

MEMOIRE ROM A FUSIBLES MULTIPLES COMPRENANT UNE STRUCTURE DE CELLULES A DISPOSITIF MOS ET PROCEDE DE LECTURE ET D'ECRITURE POUR CETTE MEMOIRE

Publication

EP 1340262 A2 20030903 (EN)

Application

EP 01997848 A 20011119

Priority

  • EP 0113467 W 20011119
  • US 72341300 A 20001127

Abstract (en)

[origin: WO0243152A2] A one-time programmable (OTP) structure is implemented using a self-aligned silicided (SALICIDE) poly-silicon fuse. In an example embodiment, the OTP structure is laid out as a fuse element having a first terminal and a second terminal. A switching transistor having a drain, source, and a gate surrounds the fuse element. The drain is coupled to the second terminal of the fuse element surrounds the fuse element. The gate surrounds the drain. The source surrounds the gate. To build transistor with sufficient drive capability for programming the fuse element, the geometry of the gate is laid out in a serpentine or an equivalent pattern increase the effective W/L. A feature of this layout is that OTP cells may be abutted to one-another to form an array. Metallization is arranged so that row lines connect to the first terminal of the fuse element and column lines connect to the gate of the switching transistor. The arrangement enables the placing of read and write circuits at opposite sides of the array. All of the gates in a column may be read simultaneously while providing write current to program one fuse at a time.

IPC 1-7

H01L 27/112; H01L 21/8246

IPC 8 full level

G11C 17/08 (2006.01); G11C 17/16 (2006.01); G11C 17/18 (2006.01); H01L 23/482 (2006.01); H01L 27/02 (2006.01); H01L 27/10 (2006.01); H10B 20/00 (2023.01); H01L 23/525 (2006.01)

CPC (source: EP US)

G11C 17/16 (2013.01 - EP); G11C 17/18 (2013.01 - EP); H01L 23/4824 (2013.01 - EP); H01L 27/0207 (2013.01 - EP); H10B 20/00 (2023.02 - EP); H10B 20/25 (2023.02 - EP US); H01L 23/525 (2013.01 - EP); H01L 23/5256 (2013.01 - EP); H01L 2924/0002 (2013.01 - EP); H01L 2924/3011 (2013.01 - EP); H10B 20/30 (2023.02 - EP)

C-Set (source: EP)

H01L 2924/0002 + H01L 2924/00

Citation (examination)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

WO 0243152 A2 20020530; WO 0243152 A3 20020919; EP 1340262 A2 20030903; JP 2004515061 A 20040520; TW I268603 B 20061211

DOCDB simple family (application)

EP 0113467 W 20011119; EP 01997848 A 20011119; JP 2002544786 A 20011119; TW 91100020 A 20020103