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    • 2. 发明公开
    • METHOD OF MANUFACTURING A NON-VOLATILE MEMORY DEVICE
    • 制造非易失性存储器件的方法
    • KR20070118348A
    • 2007-12-17
    • KR20060052367
    • 2006-06-12
    • SAMSUNG ELECTRONICS CO LTD
    • LEE WON JUNYOON BYOUNG MOONPARK CHEOL WOOPARK JIN WOOYANG JUN YOUL
    • H01L21/8247H01L27/115
    • H01L27/11521H01L21/28141H01L21/76224H01L21/76838
    • A method of manufacturing a non-volatile memory device is provided to form a wide opening between isolation layers by performing a wet-etch process. A preliminary isolation layer is protruded from a substrate in order to bury a trench formed on a substrate(100). A width of an upper surface of the preliminary isolation layer is larger than a width of a lower surface of the preliminary isolation layer. A spacer is formed on a sidewall of the preliminary isolation layer. An isolation layer(110a) having a vertical side is formed by wet-etching the preliminary isolation layer. A conductive layer for floating gate is formed to fill a space between the isolation layer and the isolation layer and to cover the isolation layer. A floating gate(130a) is formed by etching the conductive layer for floating gate. A dielectric layer(140) is formed on an upper surface of the floating gate. A control gate(150) is formed on the dielectric layer.
    • 提供制造非易失性存储器件的方法,以通过执行湿式蚀刻工艺在隔离层之间形成宽的开口。 预备隔离层从衬底突出以便掩埋形成在衬底(100)上的沟槽。 预备隔离层的上表面的宽度大于预隔离层的下表面的宽度。 间隔物形成在预备隔离层的侧壁上。 通过湿式蚀刻初步隔离层形成具有垂直侧的隔离层(110a)。 形成用于浮动栅极的导电层以填充隔离层和隔离层之间的空间并覆盖隔离层。 通过蚀刻浮栅的导电层形成浮栅(130a)。 介电层(140)形成在浮动栅极的上表面上。 在电介质层上形成控制栅极(150)。