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    • 3. 发明申请
    • CMOS INTEGRATION METHOD FOR OPTIMAL IO TRANSISTOR VT
    • 用于最佳IO晶体管VT的CMOS集成方法
    • US20120045874A1
    • 2012-02-23
    • US12857954
    • 2010-08-17
    • Weize XIONGGreg Charles Baldwin
    • Weize XIONGGreg Charles Baldwin
    • H01L21/8238
    • H01L21/823892H01L21/823857
    • Various embodiments provide methods for fabricating dual supply voltage CMOS devices with a desired I/O transistor threshold voltage. The dual supply voltage CMOS devices can be fabricated in a semiconductor substrate that includes isolated regions for a logic NMOS transistor, a logic PMOS transistor, an I/O NMOS transistor, and an I/O PMOS transistor. Specifically, the fabrication can first set and/or adjust the threshold voltage (VT) of each of the I/O NMOS transistor and the I/O PMOS transistor to a desired level. Logic NMOS and logic PMOS transistors can then be formed with I/O NMOS and I/O PMOS transistors masked without affecting the set/adjusted VT of the I/O transistors.
    • 各种实施例提供用于制造具有期望的I / O晶体管阈值电压的双电源电压CMOS器件的方法。 双电源电压CMOS器件可以制造在包括用于逻辑NMOS晶体管,逻辑PMOS晶体管,I / O NMOS晶体管和I / O PMOS晶体管的隔离区域的半导体衬底中。 具体地,制造可以首先将I / O NMOS晶体管和I / O PMOS晶体管中的每一个的阈值电压(VT)设置和/或调整到期望的水平。 逻辑NMOS和逻辑PMOS晶体管然后可以形成I / O NMOS和I / O PMOS晶体管,而不影响I / O晶体管的置位/调节VT。