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    • 5. 发明授权
    • Method of fabricating a semiconductor memory device
    • 制造半导体存储器件的方法
    • US5248628A
    • 1993-09-28
    • US896537
    • 1992-06-09
    • Naoko OkabeSatoshi InoueKazumasa SunouchiTakashi YamadaAkihiro NitayamaHiroshi Takato
    • Naoko OkabeSatoshi InoueKazumasa SunouchiTakashi YamadaAkihiro NitayamaHiroshi Takato
    • H01L21/8242H01L27/108
    • H01L27/10852H01L27/10808
    • A semiconductor memory device wherein at least one of a storage node contact hole and a bit line contact hole includes a first contact hole made in a first inter-layer insulating film formed over a gate electrode and a second contact hole made in a second inter-layer insulating film formed over an electrically conductive material embedded up to a level higher than the gate electrode in the first contact hole which is contacted with the electrically conductive material, the conductive material being exposed by etching a part of the second inter-layer insulating film, whereby the size of the memory device can be made small and the reliability can be improved. Further, a capacitor is formed in a layer higher than a bit line thereby to facilitate the processing of a storage node electrode to increase the capacitor area and to improve the reliability since it is unnecessary to carry out patterning a plate electrode within a cell array. With the above construction, a short-circuiting between the embedded layers is removed and a good quality of the second inter-layer insulating film is formed.
    • 一种半导体存储器件,其中存储节点接触孔和位线接触孔中的至少一个包括在形成在栅电极上的第一层间绝缘膜中形成的第一接触孔和在第二互连孔中形成的第二接触孔, 在导电材料上形成的层间绝缘膜,该导电材料在与导电材料接触的第一接触孔中嵌入高于栅电极的电平,通过蚀刻第二层间绝缘膜的一部分而露出导电材料 从而可以使存储器件的尺寸小并且可以提高可靠性。 此外,在高于位线的层中形成电容器,从而不需要对单元阵列内的平板电极进行图案化,便于存储节点电极的处理以增加电容器面积并提高可靠性。 利用上述结构,去除了嵌入层之间的短路,形成了第二层间绝缘膜的良好质量。
    • 8. 发明授权
    • Method of fabricating a trench capacitor
    • 制造沟槽电容器的方法
    • US06312982B1
    • 2001-11-06
    • US09351182
    • 1999-07-12
    • Hiroshi TakatoKoichi Kokubun
    • Hiroshi TakatoKoichi Kokubun
    • H01L218242
    • H01L27/10888H01L27/10829H01L27/10873H01L27/10894
    • This invention provides a semiconductor device by which a high-speed DRAM cell and logic circuit can be obtained without increasing the number of fabrication steps, and a method of fabricating the same. A memory cell is constructed of capacitors formed in two end portions of an element formation region of a silicon substrate and a MOS transistor formed between these capacitors. The interval between gate electrodes of MOS transistors in adjacent memory cells is made larger than the intervals between these gate electrodes and gate electrodes formed outside the former gate electrodes. A portion above an n-type diffusion layer connected to a capacitor node is filled with a spacer insulating film, and an n-type diffusion layer connected to a bit line is covered with the spacer insulating film. A titanium silicide film is formed on one of these n-type diffusion layers and the gate electrodes. In a first transistor in a memory cell array, a metal silicide film is not formed on the surfaces of source and drain diffusion layers and is formed only on the surface of a gate electrode. In a second transistor in a logic circuit, a metal silicide film is formed on the surfaces of source and drain diffusion layers and a gate electrode.
    • 本发明提供一种可以在不增加制造步骤的数量的情况下获得高速DRAM单元和逻辑电路的半导体器件及其制造方法。 存储单元由形成在硅衬底的元件形成区域的两个端部中的电容器和形成在这些电容器之间的MOS晶体管构成。 使相邻存储单元中的MOS晶体管的栅电极之间的间隔大于形成在前栅电极外的这些栅电极与栅电极之间的间隔。 连接到电容器节点的n型扩散层上方的部分填充有间隔绝缘膜,并且与间位绝缘膜覆盖连接到位线的n型扩散层。 在这些n型扩散层和栅电极之一上形成硅化钛膜。 在存储单元阵列中的第一晶体管中,在源极和漏极扩散层的表面上不形成金属硅化物膜,并且仅形成在栅电极的表面上。 在逻辑电路中的第二晶体管中,在源极和漏极扩散层和栅电极的表面上形成金属硅化物膜。