发明授权
- 专利标题: Semiconductor memory comprising dual charge storage nodes and methods for its fabrication
- 专利标题(中): 半导体存储器包括双电荷存储节点及其制造方法
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申请号: US11613513申请日: 2006-12-20
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公开(公告)号: US07767517B2公开(公告)日: 2010-08-03
- 发明人: Chungho Lee , Ashot Melik-Martirosian , Wei Zheng , Timothy Thurgate , Chi Chang , Hiroyuki Kinoshita , Kuo-Tung Chang , Unsoon Kim
- 申请人: Chungho Lee , Ashot Melik-Martirosian , Wei Zheng , Timothy Thurgate , Chi Chang , Hiroyuki Kinoshita , Kuo-Tung Chang , Unsoon Kim
- 申请人地址: US CA Sunnyvale
- 专利权人: Spansion LLC
- 当前专利权人: Spansion LLC
- 当前专利权人地址: US CA Sunnyvale
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
A dual charge storage node memory device and methods for its fabrication are provided. In one embodiment a dielectric plug is formed comprising a first portion recessed into a semiconductor substrate and a second portion extending above the substrate. A layer of semiconductor material is formed overlying the second portion. A first layered structure is formed overlying a first side of the second portion of the dielectric plug, and a second layered structure is formed overlying a second side, each of the layered structures overlying the layer of semiconductor material and comprising a charge storage layer between first and second dielectric layers. Ions are implanted into the substrate to form a first bit line and second bit line, and a layer of conductive material is deposited and patterned to form a control gate overlying the dielectric plug and the first and second layered structures.
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