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    • 2. 发明授权
    • Semiconductor device and method for fabricating the same
    • 半导体装置及其制造方法
    • US6034416A
    • 2000-03-07
    • US61071
    • 1998-04-16
    • Takashi UeharaToshiki YabuMizuki SegawaTakaaki UkedaMasatoshi AraiMasaru Moriwaki
    • Takashi UeharaToshiki YabuMizuki SegawaTakaaki UkedaMasatoshi AraiMasaru Moriwaki
    • H01L21/8247H01L29/72
    • H01L27/11526H01L27/11539
    • The top surface of a substrate in a peripheral circuit region is at a level that is higher than the top surface of the substrate in a memory cell region and that is substantially equal to the top surface of a floating gate electrode. A control gate electrode is formed on the floating gate electrode via a gate insulator film, and a gate electrode is formed on the substrate in the peripheral circuit region via a gate insulator film. The top surface of a buried insulator film for trench isolation may be at a level equal to the top surface of the floating gate electrode or to the top surface of an underlying film if the control gate electrode is formed of a multi-layer film. A level difference between the control gate electrode in the memory cell region and the gate electrode in the peripheral circuit region can be reduced, and thus fine patterns can be formed in these regions. In a flash-integrated logic LSI incorporating a nonvolatile memory cell, a density can be increased in the memory cell region and the peripheral circuit region and the costs can be reduced.
    • 外围电路区域中的衬底的顶表面处于比存储单元区域中的衬底顶表面高的位置,并且基本上等于浮栅电极的顶表面。 通过栅极绝缘膜在浮栅上形成控制栅电极,通过栅极绝缘膜在外围电路区域的基板上形成栅电极。 如果控制栅电极由多层膜形成,用于沟槽隔离的掩埋绝缘膜的顶表面可以处于等于浮栅电极的顶表面或底层膜的顶表面的水平。 可以减小存储单元区域中的控制栅电极与外围电路区域中的栅电极之间的电平差,从而可以在这些区域中形成精细图案。 在包含非易失性存储单元的闪存集成逻辑LSI中,可以在存储单元区域和外围电路区域中增加密度,并且可以降低成本。
    • 9. 发明授权
    • Semiconductor device
    • 半导体器件
    • US06492672B1
    • 2002-12-10
    • US09629861
    • 2000-08-01
    • Mizuki SegawaToshiki YabuTakashi UeharaTakashi NakabayashiKyoji YamashitaTakaaki UkedaMasatoshi AraiTakayuki Yamada
    • Mizuki SegawaToshiki YabuTakashi UeharaTakashi NakabayashiKyoji YamashitaTakaaki UkedaMasatoshi AraiTakayuki Yamada
    • H01L27108
    • H01L27/11526H01L21/82345H01L27/0629H01L27/105H01L27/11543H01L28/40Y10S438/957
    • A MOS transistor includes a gate oxide film, and a gate electrode which is formed by a lamination of first and second conductor films. A capacitive element includes a lower capacitive electrode formed of the first conductor film, a capacitive film made of an insulating film which is different from the gate oxide film, an upper capacitive electrode formed of the second conductor film on the capacitive film, and a leading electrode of the lower capacitive electrode formed of the second conductor film. At the same number of steps as in the case where the gate oxide film is used as the capacitive film, a semiconductor device can be manufactured with the capacitive film provided, the capacitive film being made of a nitride film or the like that is different from the gate oxide film. Consequently, a capacitive film having a great capacitance value per unit area is used so that the occupied area can be reduced and an increase in manufacturing cost can be controlled. In the semiconductor device in which a transistor, a capacitive element, a resistive film and the like are provided, the occupied area can be reduced and the manufacturing cost can be cut down.
    • MOS晶体管包括栅极氧化膜和通过第一和第二导体膜的叠层形成的栅电极。 电容元件包括由第一导体膜形成的下部电容电极,由与栅极氧化膜不同的绝缘膜制成的电容膜,由电容膜上的第二导体膜形成的上部电容电极,以及引线 电极由第二导电膜形成。 以与使用栅极氧化膜作为电容膜的情况相同的步骤,可以制造具有设置的电容膜的半导体器件,电容膜由与氮化物膜不同的氮化物膜等构成 栅氧化膜。 因此,使用具有每单位面积的大的电容值的电容膜,从而可以减小占用面积并且可以控制制造成本的增加。 在其中提供晶体管,电容元件,电阻膜等的半导体器件中,可以减小占用面积并且可以减少制造成本。