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    • 40. 发明授权
    • Capacitor for a semiconductor device and method of forming the same
    • 用于半导体器件的电容器及其形成方法
    • US07719045B2
    • 2010-05-18
    • US12251352
    • 2008-10-14
    • Young-Joo ChoHyun-Seok LimRak-Hwan KimJung-Wook KimHyun-Suk Lee
    • Young-Joo ChoHyun-Seok LimRak-Hwan KimJung-Wook KimHyun-Suk Lee
    • H01L27/108
    • H01L28/90H01L27/0207H01L27/10852H01L28/75
    • In a capacitor having a high dielectric constant, the capacitor includes a cylindrical lower electrode, a dielectric layer and an upper electrode. A metal oxide layer is formed on inner, top and outer surfaces of the lower electrode as the dielectric layer. A first sub-electrode is formed on a surface of the dielectric layer along the profile of the lower electrode and a second sub-electrode is continuously formed on the first sub-electrode corresponding to the top surface of the lower electrode, so an opening portion of the lower electrode is covered with the second sub-electrode. The first and second sub-electrodes include first and second metal nitride layers in which first and second stresses are applied, respectively. Directions of the first and second stresses are opposite to each other. Accordingly, cracking is minimized in the upper electrode with the high dielectric constant, thereby reducing current leakage.
    • 在具有高介电常数的电容器中,电容器包括圆柱形下电极,电介质层和上电极。 在作为电介质层的下电极的内表面,顶面和外表面上形成金属氧化物层。 第一子电极沿着下电极的轮廓在电介质层的表面上形成,并且第二子电极连续形成在与下电极的顶表面对应的第一子电极上,因此开口部分 的下部电极被第二子电极覆盖。 第一和第二子电极分别包括施加第一和第二应力的第一和第二金属氮化物层。 第一和第二个应力的方向彼此相反。 因此,在具有高介电常数的上电极中破裂最小化,从而减少电流泄漏。