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    • 1. 发明授权
    • Dual bit flash memory devices and methods for fabricating the same
    • 双位闪存器件及其制造方法
    • US07705390B2
    • 2010-04-27
    • US12054081
    • 2008-03-24
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • H01L21/76H01L21/792
    • H01L29/66833H01L29/7923
    • Methods for fabricating dual bit flash memory devices are provided. Method steps include forming a charge trapping layer overlying a substrate and fabricating two insulating members overlying the charge trapping layer. A polycrystalline silicon layer is provided overlying the charge trapping layer and about sidewalls of the insulating members. Sidewall spacers are formed overlying the polycrystalline silicon layer and about the sidewalls of the insulating members. A portion of the first polycrystalline silicon layer and a first portion of the charge trapping layer are removed. A first insulating layer is conformally deposited overlying the insulating members and the substrate. A gate spacer is formed between the two insulating members and overlying the first insulating layer. The two insulating members are removed and the charge trapping layer is etched to form charge storage nodes. Impurity dopants are implanted into the substrate to form impurity-doped bitline regions within the substrate.
    • 提供了制造双位闪存器件的方法。 方法步骤包括形成覆盖衬底的电荷俘获层,并制造覆盖电荷俘获层的两个绝缘构件。 提供了覆盖电荷捕获层和绝缘构件的侧壁的多晶硅层。 侧壁间隔物形成在多晶硅层上并且围绕绝缘构件的侧壁。 去除第一多晶硅层的一部分和电荷俘获层的第一部分。 第一绝缘层共形沉积在绝缘构件和衬底上。 在两个绝缘构件之间形成栅极间隔物并覆盖第一绝缘层。 去除两个绝缘构件并蚀刻电荷捕获层以形成电荷存储节点。 将杂质掺杂剂注入到衬底中以在衬底内形成杂质掺杂的位线区域。
    • 2. 发明申请
    • DUAL BIT FLASH MEMORY DEVICES AND METHODS FOR FABRICATING THE SAME
    • 双位闪存存储器件及其制造方法
    • US20080169502A1
    • 2008-07-17
    • US12054081
    • 2008-03-24
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • H01L29/792
    • H01L29/66833H01L29/7923
    • Methods for fabricating dual bit flash memory devices are provided. Method steps include forming a charge trapping layer overlying a substrate and fabricating two insulating members overlying the charge trapping layer. A polycrystalline silicon layer is provided overlying the charge trapping layer and about sidewalls of the insulating members. Sidewall spacers are formed overlying the polycrystalline silicon layer and about the sidewalls of the insulating members. A portion of the first polycrystalline silicon layer and a first portion of the charge trapping layer are removed. A first insulating layer is conformally deposited overlying the insulating members and the substrate. A gate spacer is formed between the two insulating members and overlying the first insulating layer. The two insulating members are removed and the charge trapping layer is etched to form charge storage nodes. Impurity dopants are implanted into the substrate to form impurity-doped bitline regions within the substrate.
    • 提供了制造双位闪存器件的方法。 方法步骤包括形成覆盖衬底的电荷俘获层,并制造覆盖电荷俘获层的两个绝缘构件。 提供了覆盖电荷捕获层和绝缘构件的侧壁的多晶硅层。 侧壁间隔物形成在多晶硅层上并且围绕绝缘构件的侧壁。 去除第一多晶硅层的一部分和电荷俘获层的第一部分。 第一绝缘层共形沉积在绝缘构件和衬底上。 在两个绝缘构件之间形成栅极间隔物并覆盖第一绝缘层。 去除两个绝缘构件并蚀刻电荷捕获层以形成电荷存储节点。 将杂质掺杂剂注入到衬底中以在衬底内形成杂质掺杂的位线区域。
    • 3. 发明授权
    • Dual bit flash memory devices and methods for fabricating the same
    • 双位闪存器件及其制造方法
    • US07368347B2
    • 2008-05-06
    • US11538404
    • 2006-10-03
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • Amol Ramesh JoshiNing ChengMinghao Shen
    • H01L21/336
    • H01L29/66833H01L29/7923
    • Methods for fabricating dual bit flash memory devices are provided. Method steps include forming a charge trapping layer overlying a substrate and fabricating two insulating members overlying the charge trapping layer. A polycrystalline silicon layer is provided overlying the charge trapping layer and about sidewalls of the insulating members. Sidewall spacers are formed overlying the polycrystalline silicon layer and about the sidewalls of the insulating members. A portion of the first polycrystalline silicon layer and a first portion of the charge trapping layer are removed. A first insulating layer is conformally deposited overlying the insulating members and the substrate. A gate spacer is formed between the two insulating members and overlying the first insulating layer. The two insulating members are removed and the charge trapping layer is etched to form charge storage nodes. Impurity dopants are implanted into the substrate to form impurity-doped bitline regions within the substrate.
    • 提供了制造双位闪存器件的方法。 方法步骤包括形成覆盖衬底的电荷俘获层,并制造覆盖电荷俘获层的两个绝缘构件。 提供了覆盖电荷捕获层和绝缘构件的侧壁的多晶硅层。 侧壁间隔物形成在多晶硅层上并且围绕绝缘构件的侧壁。 去除第一多晶硅层的一部分和电荷俘获层的第一部分。 第一绝缘层共形沉积在绝缘构件和衬底上。 在两个绝缘构件之间形成栅极间隔物并覆盖第一绝缘层。 去除两个绝缘构件并蚀刻电荷捕获层以形成电荷存储节点。 将杂质掺杂剂注入到衬底中以在衬底内形成杂质掺杂的位线区域。