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    • 39. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US5442212A
    • 1995-08-15
    • US292303
    • 1994-08-18
    • Takahisa Eimori
    • Takahisa Eimori
    • H01L27/04H01L21/822H01L21/8242H01L27/10H01L27/108H01L29/68
    • H01L27/10808
    • In a semiconductor memory device, pitch of bit lines is made larger than pitch of word lines, and a storage node contact is positioned in each rectangular area surrounded by the bit lines and the word lines. The distance between centers of adjacent storage node contacts and the distance between centers of a bit line contact and an adjacent storage node contact are both made larger than the pitch of word lines. By this structure, planar area per unit memory cell can be increased, registration margin between the storage node and the storage node contact can be enlarged, short-circuit between the bit line and the storage node contact is prevented, and thus a memory cell structure of high production yield and high reliability can be realized.
    • 在半导体存储器件中,位线的间距大于字线的间距,并且存储节点接点位于由位线和字线包围的每个矩形区域中。 相邻存储节点触点的中心之间的距离以及位线接触的中心与相邻的存储节点触点之间的距离都大于字线的间距。 通过这种结构,可以增加每单位存储单元的平面面积,可以扩大存储节点与存储节点接触点之间的配准余量,从而防止位线与存储节点接触之间的短路,从而存储单元结构 可以实现高产量和高可靠性。