发明名称 |
Method for manufacturing a tunneling field effect transistor with a U-shaped channel |
摘要 |
The present invention belongs to the technical field of semiconductor device manufacturing and specifically relates to a method for manufacturing a tunneling field effect transistor with a U-shaped channel. The U-shaped channel can effectively extend the transistor channel length, restrain the generation of leakage current in the transistor, and decrease the chip power consumption. The method for manufacturing a tunneling field effect transistor with a U-shaped channel put forward in the present invention is capable of realizing an extremely narrow U-shaped channel, overcoming the alignment deviation introduced by photoetching, and improving the chip integration degree. |
申请公布号 |
US8748267(B2) |
申请公布日期 |
2014.06.10 |
申请号 |
US201213537956 |
申请日期 |
2012.06.29 |
申请人 |
FUDAN University |
发明人 |
Wang Pengfei;Lin Xi;Liu Wei;Sun Qingqing;Zhang Wei |
分类号 |
H01L21/336 |
主分类号 |
H01L21/336 |
代理机构 |
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代理人 |
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主权项 |
1. A method for manufacturing a tunneling field effect transistor with a U-shaped channel, wherein it comprises the following steps:
provide a semiconductor substrate; form a first doping region of a first doping type in the semiconductor substrate; form a first kind of insulation film on the semiconductor substrate; etch the first kind of insulation film and the semiconductor substrate to form a pattern; deposit a second kind of insulation film and etch the second kind of insulation film to form a sidewall and expose the substrate; form a third kind of insulation film on the substrate exposed through oxidation; remove the second kind of insulation film; etch the substrate along exposed sidewalls of the first and third kinds of insulation film to form a groove; cover the groove with a fourth kind of insulation film; cover the fourth kind of insulation film with a first kind of conductive film; etch the first kind of conductive film to form a device gate conductive layer; cover the gate conductive layer with a gate protection layer; etch the fourth and third kinds of insulation film to expose the substrate; etch the substrate exposed to form a region for subsequent development; form a second doping region of the first doping type in the semiconductor substrate; cover the second doping region of the first doping type with a fifth kind of insulation film; cover the fifth kind of insulation film with a conductive material to form a source region of a second doping type; etch the gate protection layer to form a gate sidewall; deposit a sixth kind of insulation film to form a device passivation layer; etch the sixth kind of insulation film to form a contact hole; deposit a second kind of conductive film and etch the second kind of conductive film to form an electrode.
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地址 |
Shanghai CN |