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    • 15. 发明授权
    • Method of fabricating a DRAM capacitor
    • 制造DRAM电容器的方法
    • US06218243B1
    • 2001-04-17
    • US09252127
    • 1999-02-18
    • Wayne TanKun-Chi LinGwo-Shii Yang
    • Wayne TanKun-Chi LinGwo-Shii Yang
    • H01L218242
    • H01L28/84H01L27/10852
    • A method of fabricating a DRAM capacitor includes the step of forming an insulated layer and an etching stop layer successively on a substrate having a device structure. A contact window is formed within the etching stop layer and the insulated layer. A conductive layer is formed on the etching layer to fill in the contact window and patterned to serve as a lower electrode of the capacitor. A highly doped dielectric layer is then formed on the lower electrode and a thermal process is performed to diffuse the dopants inside the highly doped dielectric layer into the surface of the lower electrode. The dielectric layer is removed. A capacitor dielectric layer and an upper electrode are successively formed on the lower electrode to complete the fabrication of the capacitor.
    • 制造DRAM电容器的方法包括在具有器件结构的衬底上依次形成绝缘层和蚀刻停止层的步骤。 在蚀刻停止层和绝缘层内形成接触窗。 在蚀刻层上形成导电层以填充接触窗口并图案化以用作电容器的下电极。 然后在下电极上形成高掺杂的电介质层,并进行热处理,以将高掺杂电介质层内的掺杂剂扩散到下电极的表面。 去除电介质层。 电容器电介质层和上电极依次形成在下电极上以完成电容器的制造。
    • 17. 发明授权
    • Method for testing leakage current caused self-aligned silicide
    • 泄漏电流测试方法引起自对准硅化物
    • US06249138B1
    • 2001-06-19
    • US09447846
    • 1999-11-23
    • Michael WC HuangGwo-Shii YangHsiao-Ling LuWen-Yi Hsieh
    • Michael WC HuangGwo-Shii YangHsiao-Ling LuWen-Yi Hsieh
    • G01R3126
    • G01R31/2648
    • A method of testing a leakage current caused by a self-aligned silicide process is described. The invention uses different test structure to monitor degree of and reason for a leakage current caused by a self-aligned silicide process. While monitoring a self-aligned silicide process performed on a metal-oxide semiconductor transistor without a LDD region, in addition to considering a leakage current occurring from the metal silicide layer to the junction and occurring at edge of the metal silicide layer, the invention further considers a leakage current at comer of the metal silicide layer. For a metal-oxide semiconductor transistor having a LDD region, the invention further considers a leakage current from the metal silicide layer to the LDD region. The invention monitors a leakage current at comer of the metal silicide layer.
    • 描述了由自对准硅化物工艺引起的漏电流的测试方法。 本发明使用不同的测试结构来监测由自对准硅化物工艺引起的漏电流的程度和原因。 在监视对没有LDD区域的金属氧化物半导体晶体管进行的自对准硅化物处理的同时,除了考虑从金属硅化物层发生到结以及在金属硅化物层的边缘处发生的漏电流之外,本发明进一步 考虑在金属硅化物层的角落处的漏电流。 对于具有LDD区域的金属氧化物半导体晶体管,本发明还考虑了从金属硅化物层到LDD区域的漏电流。 本发明监测金属硅化物层的角落处的漏电流。
    • 18. 发明授权
    • Method of forming a contact hole of a DRAM
    • 形成DRAM接触孔的方法
    • US06200904B1
    • 2001-03-13
    • US09323546
    • 1999-06-01
    • Wayne TanGwo-Shii YangKun-Chi Lin
    • Wayne TanGwo-Shii YangKun-Chi Lin
    • H01L21302
    • H01L21/76831H01L21/76804H01L21/76897H01L27/10814H01L27/10855H01L27/10885
    • The present invention relates to a method of forming a contact hole of a DRAM on the semiconductor wafer. The semiconductor wafer comprises a substrate, a first dielectric layer, two bit lines on the first dielectric layer, a second dielectric layer, and a photo-resist layer comprising an opening to define the pattern of the contact hole. The method comprises performing a first anisotropic etching process to vertically remove a portion of the two dielectric layers and two bit lines to grossly form the contact hole, removing the photo-resist layer in its entirety, performing a thermal oxidation to form a silicon oxide layer on the side walls of the two bit lines, then forming a silicon nitride layer on the surface of the contact hole, and performing a dry etching to remove the silicon nitride layer. There is a silicon oxide layer and a silicon nitride layer between the bit line and the contact hole, and the contact area of the contact hole will not be reduced.
    • 本发明涉及在半导体晶片上形成DRAM的接触孔的方法。 半导体晶片包括基板,第一介电层,第一电介质层上的两个位线,第二电介质层和包含用于限定接触孔的图案的开口的光致抗蚀剂层。 该方法包括执行第一各向异性蚀刻工艺以垂直去除两个电介质层和两个位线的一部分,以大致形成接触孔,完全去除光致抗蚀剂层,进行热氧化以形成氧化硅层 在两个位线的侧壁上,然后在接触孔的表面上形成氮化硅层,并进行干蚀刻以除去氮化硅层。 位线和接触孔之间有一个氧化硅层和一个氮化硅层,接触孔的接触面积不会减小。