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    • 7. 发明授权
    • Method for fabricating a mask read-only-memory with diode cells
    • 用二极管电池制造掩膜只读存储器的方法
    • US06821841B1
    • 2004-11-23
    • US10643964
    • 2003-08-20
    • Chun-Pei WuHuei-Huarng ChenWen-Bin TsaiHsuan-Ling Kao
    • Chun-Pei WuHuei-Huarng ChenWen-Bin TsaiHsuan-Ling Kao
    • H01L218242
    • H01L27/112H01L27/11253H01L27/1126
    • A method for fabricating a mask read-only-memory with diode cells is provided. A doped conductive layer with a first conductivity is formed on bit lines. Then, a photoresist layer with a mask ROM pattern is formed on an interlayer dielectric layer on the doped conductive layer for serving as an etching mask, thereby forming openings in the interlayer dielectric layer unto the exposed regions of the doped conductive layer. Performing ion implantation to form a diffusion region with a second conductivity opposite to the first conductivity in each exposed region of the doped conductive layer, so that the doped conductive layer and the diffusion regions formed therein constitute diode cells that are served as memory cells. A contact plug is formed in each opening unto the diode cell and a conductive layer is formed on the contact plug for serving as word lines.
    • 提供了一种制造具有二极管单元的掩模只读存储器的方法。 在位线上形成具有第一导电性的掺杂导电层。 然后,在用作蚀刻掩模的掺杂导电层上的层间电介质层上形成具有掩模ROM图案的光致抗蚀剂层,从而在层间电介质层中向掺杂导电层的暴露区域形成开口。 进行离子注入以形成具有与掺杂导电层的每个暴露区域中的第一导电性相反的第二导电性的扩散区域,使得在其中形成的掺杂导电层和扩散区域构成用作存储单元的二极管单元。 在二极管单元的每个开口中形成接触塞,并且在接触插塞上形成用作字线的导电层。