发明授权
- 专利标题: Bi-directional read/program non-volatile floating gate memory cell with independent controllable control gates, and array thereof, and method of formation
- 专利标题(中): 具有独立可控制控制栅极的双向读/写非易失性浮栅存储单元及其阵列及其形成方法
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申请号: US10409407申请日: 2003-04-07
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公开(公告)号: US07190018B2公开(公告)日: 2007-03-13
- 发明人: Bomy Chen , Sohrab Kianian , Jack Frayer
- 申请人: Bomy Chen , Sohrab Kianian , Jack Frayer
- 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 US LLP
- 主分类号: H01L29/788
- IPC分类号: H01L29/788
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. An independently controllable control gate is insulated from 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. The independently controllable control gates permit an array of such memory cells to operate in a NAND configuration.
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