E-fuse array circuit

Patent metadata

Field	Value
Publication number	US-9007802-B2
Application number	US-201213610451-A
Country	US
Kind code	B2
Filing date	Sep 11, 2012
Priority date	Sep 11, 2012
Publication date	Apr 14, 2015
Grant date	Apr 14, 2015

Abstract

An e-fuse array circuit includes a program gate line and a word line gate line that are stretched in parallel to each other, and a metal line formed over the program gate line and the word line gate line to cover the program gate line and the word line gate line, the metal line connected to the program gate line through a plurality of contact plugs disposed at a given distance.

First claim

What is claimed is:

1. An e-fuse array circuit, comprising:
a program gate line and a word line gate line that are stretched in parallel to each other;
a metal line formed over the program gate line and the word line gate line to cover the program gate line and the word line gate line, the metal line connected to the program gate line through a plurality of contact plugs disposed at a given distance;
a plurality of e-fuse transistors configured to receive a voltage of the program gate line through gates of the e-fuse transistors; and
a plurality of selection transistors configured to be serially coupled with the e-fuse transistors, respectively, and receive a voltage of the word line gate line through gates of the selection transistors.

2. The e-fuse array circuit of claim 1 , further comprising:
an inter-layer dielectric layer formed over the program gate line and the word line gate line.

3. The e-fuse array circuit of claim 1 , wherein the e-fuse transistors that are adjacent to the one or more contact plugs among the multiple e-fuse transistors have a smaller active area than the other e-fuse transistors.

4. The e-fuse array circuit of claim 3 , wherein the e-fuse transistors that are adjacent to the one or more contact plugs are dummies.

5. The c-fuse array circuit of claim 1 , wherein the program gate line and the word line gate line are formed of polysilicon.

6. The e-fuse array circuit of claim 1 , wherein the one or more contact plugs are formed over an upper portion of a region other than the active regions of the multiple e-fuse transistors.

Assignees

• Son Sungju
• Kim Youncheul
• Kim Sungho
• Ko Dongue
• Sk Hynix Inc

Inventors

• Son Sungju
• Kim Youncheul
• Kim Sungho
• Ko Dongue

Classifications

• G11C17/18 Primary

  Auxiliary circuits, e.g. for writing into memory · CPC title

• G11C17/04

  using capacitive elements (G11C17/06, G11C17/14 take precedence) · CPC title

• G11C17/16

  using electrically-fusible links · CPC title

• G11C16/06 Primary

  Auxiliary circuits, e.g. for writing into memory · CPC title