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    • 4. 发明授权
    • Methods for fabricating deep trench capacitors
    • 制造深沟槽电容器的方法
    • US08609486B1
    • 2013-12-17
    • US13345630
    • 2012-01-06
    • Peter SmeysCharu Sardana
    • Peter SmeysCharu Sardana
    • H01L21/8242
    • H01L29/66181H01L29/945
    • Integrated circuits with transistors and decoupling capacitor structures are provided. A decoupling capacitor structure may include multiple deep trench structures formed in a semiconductor substrate. The deep trench structures may each be lined with high-κ dielectric material. A conductive metal layer for use in controlling threshold voltages associated with n-channel or p-channel devices may be formed over the high-κ dielectric liner. Conductive material such as aluminum may be used to fill the remaining trench cavity. The high-κ dielectric liner may be simultaneously deposited into the deep trench structures and gate regions of the transistors. In one suitable arrangement, the deep trench structures and transistor metal gates for at least a selected type of transistors may be formed in parallel. In another suitable arrangement, the deep trench structures and the transistor metal gates may be formed in separate steps.
    • 提供了具有晶体管和去耦电容器结构的集成电路。 去耦电容器结构可以包括形成在半导体衬底中的多个深沟槽结构。 深沟槽结构可以各自用高kappa介电材料衬里。 用于控制与n沟道或p沟道器件相关联的阈值电压的导电金属层可以形成在高卡介质衬垫上。 可以使用诸如铝的导电材料来填充剩余的沟槽空腔。 高卡介质衬垫可以同时沉积到晶体管的深沟槽结构和栅极区域中。 在一种合适的布置中,用于至少一种选定类型的晶体管的深沟槽结构和晶体管金属栅极可以并联形成。 在另一种合适的布置中,深沟槽结构和晶体管金属栅极可以分开形成。