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    • 6. 发明授权
    • Method for fabricating y-direction, self-alignment mask ROM device
    • 用于制造y方向,自对准掩模ROM器件的方法
    • US06699761B2
    • 2004-03-02
    • US10064396
    • 2002-07-10
    • Jen-Chuan Pan
    • Jen-Chuan Pan
    • H01L21336
    • H01L27/11266H01L21/823892H01L27/105H01L27/11293
    • A method for fabricating a y-direction, self-alignment mask ROM device is described. The method includes forming a buried drain region in a substrate and forming a gate oxide layer on the substrate. Perpendicular to the direction of the buried drain region, a bar-shaped silicon nitride layer is formed on the gate oxide layer. A photoresist layer is then formed on the gate oxide layer and the bar-shaped silicon nitride layer. Performing a code implantation to form a plurality of coded memory cells using the photoresist layer as a mask. The photoresist layer is then removed. A polysilicon layer is further formed on the gate oxide layer and the bar-shaped silicon nitride layer. The polysilicon layer is back-etched until the bar-shaped silicon nitride layer is exposed. The silicon nitride layer is subsequently removed.
    • 描述了用于制造y方向自对准掩模ROM器件的方法。 该方法包括在衬底中形成埋漏区,并在衬底上形成栅极氧化层。 垂直于掩埋漏极区域的方向,在栅极氧化物层上形成棒状氮化硅层。 然后在栅极氧化物层和棒状氮化硅层上形成光致抗蚀剂层。 使用光致抗蚀剂层作为掩模来执行代码注入以形成多个编码存储单元。 然后除去光致抗蚀剂层。 在栅极氧化物层和棒状氮化硅层上还形成多晶硅层。 多晶硅层被反蚀刻直到棒状氮化硅层露出。 随后去除氮化硅层。
    • 7. 发明授权
    • Method for fabricating mask ROM device
    • 掩模ROM器件的制造方法
    • US06559013B1
    • 2003-05-06
    • US10064397
    • 2002-07-10
    • Jen-Chuan Pan
    • Jen-Chuan Pan
    • H01L218234
    • H01L27/1126H01L27/112
    • A method for fabricating a mask ROM device is described. The method includes forming a buried drain region in a substrate and forming a thick oxide layer on the substrate. Perpendicular to the direction of the buried drain region, a bar-shaped silicon nitride layer is formed on the thick oxide layer. A portion of the thick oxide layer is then removed to expose the substrate, followed by forming a gate oxide layer on the exposed substrate surface for forming a plurality of coded memory cells, wherein the coded memory cells with a gate oxide layer corresponds to a logic state “1” while the code memory cells with a thick silicon oxide layer corresponds to a logic state “0”. A polysilicon layer is then formed on the substrate, followed by back-etching the polysilicon layer to expose the bar-shaped silicon nitride layer. After this, the bar-shaped silicon nitride layer is removed.
    • 描述了一种制造掩模ROM器件的方法。 该方法包括在衬底中形成掩埋漏极区域,并在衬底上形成厚的氧化物层。 垂直于埋漏区的方向,在厚氧化物层上形成棒状氮化硅层。 然后去除厚氧化物层的一部分以暴露衬底,随后在暴露的衬底表面上形成栅极氧化物层,以形成多个编码存储器单元,其中具有栅极氧化物层的编码存储器单元对应于逻辑 状态“1”,而具有厚氧化硅层的代码存储单元对应于逻辑状态“0”。 然后在衬底上形成多晶硅层,然后反向蚀刻多晶硅层以暴露棒状氮化硅层。 之后,去除棒状氮化硅层。