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    • 9. 发明授权
    • FinFET-compatible metal-insulator-metal capacitor
    • FinFET兼容金属 - 绝缘体 - 金属电容器
    • US08860107B2
    • 2014-10-14
    • US12793292
    • 2010-06-03
    • Wilfried E. HaenschPranita KulkarniTenko Yamashita
    • Wilfried E. HaenschPranita KulkarniTenko Yamashita
    • H01L27/108H01L21/8234H01L27/08H01L27/06
    • H01L21/823431H01L27/0629H01L27/0805
    • At least one semiconductor fin for a capacitor is formed concurrently with other semiconductor fins for field effect transistors. A lower conductive layer is deposited and lithographically patterned to form a lower conductive plate located on the at least one semiconductor fin. A dielectric layer and at least one upper conductive layer are formed and lithographically patterned to form a node dielectric and an upper conductive plate over the lower conductive plate as well as a gate dielectric and a gate conductor over the other semiconductor fins. The lower conductive plate, the node dielectric, and the upper conductive plate collectively form a capacitor. The finFETs may be dual gate finFETs or trigate finFETs. A buried insulator layer may be optionally recessed to increase the capacitance. Alternately, the lower conductive plate may be formed on a planar surface of the buried insulator layer.
    • 用于电容器的至少一个半导体鳍片与用于场效应晶体管的其它半导体鳍片同时形成。 沉积下导电层并以光刻方式图案化以形成位于至少一个半导体鳍片上的下导电板。 形成电介质层和至少一个上导电层,并将其光刻图案化以在下导电板上形成节点电介质和上导电板,以及在其它半导体鳍片上的栅极电介质和栅极导体。 下导电板,节点电介质和上导电板共同形成电容器。 finFET可以是双栅极finFET或者触发的finFET。 埋入的绝缘体层可以任选地凹入以增加电容。 或者,下导电板可以形成在掩埋绝缘体层的平坦表面上。