发明授权
US07691717B2 Polysilicon containing resistor with enhanced sheet resistance precision and method for fabrication thereof 失效
具有增强的薄层电阻精度的含多晶硅的电阻器及其制造方法

Polysilicon containing resistor with enhanced sheet resistance precision and method for fabrication thereof
摘要:
A polysilicon containing resistor includes: (1) a p dopant selected from the group consisting of boron and boron difluoride; and (2) an n dopant selected from the group consisting of arsenic and phosphorus. Each of the p dopant and the n dopant has a dopant concentration from about 1e18 to about 1e21 dopant atoms per cubic centimeter. A method for forming the polysilicon resistor uses corresponding implant doses from about 1e14 to about 1e16 dopant ions per square centimeter. The p dopant and the n dopant may be provided simultaneously or sequentially. The method provides certain polysilicon resistors with a sheet resistance percentage standard deviation of less than about 1.5%, for a polysilicon resistor having a sheet resistance from about 100 to about 5000 ohms per square.
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