- 专利标题: Bi-directional read/program non-volatile floating gate memory cell and array thereof, and method of formation
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申请号: US10409333申请日: 2003-04-07
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公开(公告)号: US06936883B2公开(公告)日: 2005-08-30
- 发明人: Bomy Chen , Jack Frayer , Dana Lee
- 申请人: Bomy Chen , Jack Frayer , Dana Lee
- 申请人地址: US CA Sunnyvale
- 专利权人: Silicon Storage Technology, Inc.
- 当前专利权人: Silicon Storage Technology, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 代理机构: DLA Piper Rudnick Gray Cary US LLP
- 主分类号: G11C16/04
- IPC分类号: G11C16/04 ; H01L21/8247 ; H01L27/115 ; H01L29/423 ; H01L29/788 ; H01L29/792
摘要:
A bi-directional read/program non-volatile memory cell and array is capable of achieving high density. Each memory cell has two spaced floating gates for storage of charges thereon. The cell has spaced apart source/drain regions with a channel therebetween, with the channel having three portions. One of the floating gate is over a first portion; another floating gate is over a second portion, and a gate electrode controls the conduction of the channel in the third portion between the first and second portions. A control gate is connected to each of the source/drain regions, and is also capacitively coupled to the floating gate. The cell programs by hot channel electron injection, and erases by Fowler-Nordheim tunneling of electrons from the floating gate to the gate electrode. Bi-directional read permits the cell to be programmed to store bits, with one bit in each floating gate.
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