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    • 23. 发明申请
    • MANUFACTURING PROCESS FOR ZERO-CAPACITOR RANDOM ACCESS MEMORY CIRCUITS
    • 零电容随机存取电路的制造工艺
    • WO2009031052A2
    • 2009-03-12
    • PCT/IB2008/003284
    • 2008-03-21
    • INNOVATIVE SILICON S.A.FAZAN, Pierre
    • FAZAN, Pierre
    • H01L27/10805H01L21/84H01L27/108H01L27/10844H01L27/10847H01L27/1203H01L29/7841
    • Embodiments of a manufacturing process flow for producing standalone memory devices that can achieve bit cell sizes on the order of 4F2 or 5F2, and that can be applied to common source/drain, separate source/drain, or common source only or common drain only transistor arrays. Active area and word line patterns are formed as perpendicularly-arranged straight lines on a Silicon-on-Insulator substrate. The intersections of the active area and spaces between word lines define contact areas for the connection of vias and metal line layers. Insulative spacers are used to provide an etch mask pattern that allows the selective etching of contact areas as a series of linear trenches, thus facilitating straight line lithography techniques. Embodiments of the manufacturing process remove first layer metal (metal-1) islands and form elongated vias, in a succession of processing steps to build dense memory arrays.
    • 用于制造独立存储器件的制造工艺流程的实施例,其可以实现4F2或5F2的数量级的位单元尺寸,并且可以应用于公共源极/漏极,单独的源极/漏极或仅公共源极或仅公共漏极晶体管 阵列。 有源区域和字线图案在绝缘体上硅衬底上形成为垂直布置的直线。 活动区域和字线间的交点定义用于连接通孔和金属线层的接触区域。 使用绝缘间隔物来提供蚀刻掩模图案,其允许将接触区域选择性地蚀刻为一系列线性沟槽,从而便于直线光刻技术。 制造过程的实施例在连续的处理步骤中去除第一层金属(金属-1)岛并形成细长的通孔以构建密集的存储器阵列。