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    • 5. 发明授权
    • Method of fabricating a self-aligned split gate of a flash memory
    • 制造闪存的自对准分裂门的方法
    • US06228718B1
    • 2001-05-08
    • US09468558
    • 1999-12-21
    • Chih-Jen HuangShih-Fang Hong
    • Chih-Jen HuangShih-Fang Hong
    • H01L218247
    • H01L27/11521
    • The present invention is a method of fabricating a self-aligned split gate of flash memory. Aligned layers are formed on predetermined source regions and predetermined drain regions in advance. Spacers are formed on the sidewalls of the aligned layers. An etching rate of the spacers is different from an etching rate of the aligned layers. Therefore, if misalignment occurs during the patterning process to form a split control gate layer, the spacers also can be left after the aligned layer is removed. The remaining spacers serves as a implant mask during the implantion for the sources and the drains formation, so that the sources and the drains are formed in the respective positions of the aligned layers by self-alignment.
    • 本发明是制造闪存的自对准分裂门的方法。 对准层预先在预定的源极区域和预定的漏极区域上形成。 间隔物形成在对准层的侧壁上。 间隔物的蚀刻速率与对准层的蚀刻速率不同。 因此,如果在形成分割控制栅极层的图案化工艺期间发生不对准,则在去除对准层之后也可以留下间隔物。 剩余的间隔物在用于源和漏极形成的植入期间用作植入物掩模,使得源和漏极通过自对准形成在对准层的相应位置。
    • 6. 发明授权
    • Electrically erasable non-volatile memory
    • 电可擦除非易失性存储器
    • US06255172B1
    • 2001-07-03
    • US09567918
    • 2000-05-10
    • Chih-Jen HuangAuter WuShih-Fang Hong
    • Chih-Jen HuangAuter WuShih-Fang Hong
    • H01L218247
    • H01L29/66825H01L21/28273
    • A method of manufacturing an electrically erasable non-volatile memory is suitable for use on a substrate. The method includes the following steps. First, a tunnel oxide layer is formed on the substrate. A floating gate and a silicon oxide layer/silicon nitride/silicon oxide layer is formed in order on the tunnel oxide layer. Next, a first oxide layer and a silicon nitride spacer are formed in order on the sidewalls of the floating gate. A second oxide layer is formed along the surface of the above entire structure. A third oxide layer is formed on the substrate on both sides of the silicon nitride spacer by oxidation. A patterned conductive layer on the substrate to serve as a control gate and a select transistor gate is formed above the substrate. Using the select transistor gate as a mask, the exposed part of the third oxide layer is removed to make the residual third oxide layer serve as a gate oxide layer of the select transistor. Finally, ion implantation is performed on the substrate to form source and drain regions.
    • 制造电可擦除非易失性存储器的方法适用于基板。 该方法包括以下步骤。 首先,在基板上形成隧道氧化层。 在隧道氧化物层上依次形成浮置栅极和氧化硅层/氮化硅/氧化硅层。 接下来,在浮栅的侧壁上依次形成第一氧化物层和氮化硅间隔物。 沿着上述整个结构的表面形成第二氧化物层。 通过氧化在氮化硅间隔物的两侧的基板上形成第三氧化物层。 在衬底上形成用作控制栅极和选择晶体管栅极的图案化导电层。 使用选择晶体管栅极作为掩模,去除第三氧化物层的暴露部分,使剩余的第三氧化物层用作选择晶体管的栅极氧化物层。 最后,在衬底上进行离子注入以形成源区和漏区。