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    • 10. 发明授权
    • FETS with self-aligned bodies and backgate holes
    • 具有自对准主体和后盖孔的FET
    • US07659579B2
    • 2010-02-09
    • US11539288
    • 2006-10-06
    • Brent A. AndersonAndres BryantEdward J. NowakRichard Q. Williams
    • Brent A. AndersonAndres BryantEdward J. NowakRichard Q. Williams
    • H01L29/78
    • H01L29/78612H01L29/66772H01L29/78621H01L29/78648
    • A FET has a shallow source/drain region, a deep channel region, a gate stack and a back gate that is surrounded by dielectric. The FET structure also includes halo or pocket implants that extend through the entire depth of the channel region. Because a portion of the halo and well doping of the channel is deeper than the source/drain depth, better threshold voltage and process control is achieved. A back-gated FET structure is also provided having a first dielectric layer in this structure that runs under the shallow source/drain region between the channel region and the back gate. This first dielectric layer extends from under the source/drain regions on either side of the back gate and is in contact with a second dielectric such that the back gate is bounded on each side or isolated by dielectric.
    • FET具有浅电源/漏极区域,深沟道区域,栅极堆叠和被电介质包围的背栅极。 FET结构还包括延伸通过通道区域的整个深度的晕或凹坑植入物。 因为沟道的一部分光晕和阱掺杂比源极/漏极深度更深,所以实现了更好的阈值电压和过程控制。 还提供了后栅化FET结构,其具有在该结构中的第一介电层,其在沟道区域和后栅极之间的浅源极/漏极区域下方延伸。 该第一电介质层从背栅的两侧的源极/漏极区下方延伸并与第二电介质接触,使得后栅极在每一侧上界定或通过电介质隔离。