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    • 62. 发明授权
    • Semiconductor device having multilevel interconnection structure and method for fabricating the same
    • 具有多层互连结构的半导体器件及其制造方法
    • US06545361B2
    • 2003-04-08
    • US09835169
    • 2001-04-16
    • Tetsuya UedaEiji TamaokaNobuo Aoi
    • Tetsuya UedaEiji TamaokaNobuo Aoi
    • H01L2348
    • H01L21/76897H01L21/76801H01L21/7682H01L21/76838H01L21/76885H01L23/5222H01L23/5226H01L2924/0002H01L2924/00
    • A method for fabricating a semiconductor device having a multilevel interconnection structure according to the present invention includes the steps of: covering a surface of a substrate with an insulating film; depositing a conductive film on the insulating film; forming a first interlevel dielectric film on the conductive film; forming an interlevel contact hole in the first interlevel dielectric film so as to reach the conductive film; filling in the interlevel contact hole with an interconnecting metal; forming a masking layer, defining a pattern of a first interconnect layer, on the first interlevel dielectric film so as to cover at least part of the interconnecting metal; forming the first interconnect layer out of the conductive film by etching the first interlevel dielectric film using the masking layer as a mask and by etching the conductive film using the masking layer and the interconnecting metal as a mask; removing the masking layer; depositing a second interlevel dielectric film over the substrate so as to cover the interconnecting metal and the first interconnect layer; planarizing the second interlevel dielectric film, thereby exposing at least part of the interconnecting metal; and forming a second interconnect layer to be electrically connected to an upper part of the interconnecting metal.
    • 根据本发明的制造具有多层互连结构的半导体器件的方法包括以下步骤:用绝缘膜覆盖衬底的表面; 在绝缘膜上沉积导电膜; 在导电膜上形成第一层间电介质膜; 在所述第一层间绝缘膜中形成层间接触孔,以到达所述导电膜; 用互连金属填充层间接触孔; 在所述第一层间绝缘膜上形成限定第一互连层图案的掩模层,以便覆盖所述互连金属的至少一部分; 通过使用掩模层作为掩模蚀刻第一层间电介质膜,并且使用掩模层和互连金属作为掩模蚀刻导电膜,从导电膜形成第一互连层; 去除掩蔽层; 在所述衬底上沉积第二层间电介质膜以便覆盖所述互连金属和所述第一互连层; 平面化第二层间电介质膜,从而暴露至少部分互连金属; 以及形成与所述互连金属的上部电连接的第二互连层。
    • 64. 发明授权
    • Semiconductor device comprising MISFETS and method of manufacturing the
same
    • 包括MISFET的半导体器件及其制造方法
    • US5986313A
    • 1999-11-16
    • US988776
    • 1997-12-11
    • Tetsuya UedaTakashi UeharaKousaku YanoSatoshi Ueda
    • Tetsuya UedaTakashi UeharaKousaku YanoSatoshi Ueda
    • H01L21/336H01L21/8234H01L29/417H01L29/76H01L29/94H01L31/062H01L31/113
    • H01L29/6659H01L21/823475H01L29/41775H01L29/41783H01L29/66545
    • There is formed an isolation which surrounds an active region of a semiconductor substrate. Formed over the active region and on the isolation, respectively, are a gate electrode and two gate interconnections on both sides thereof. Between the gate electrode and the gate interconnections are located two first interspaces each of which is smaller in width than a specified value and a second interspace which is larger in width than the specified value and interposed between the two first interspaces. In forming side walls on both side faces of the gate electrode and gate interconnections by depositing an insulating film on the substrate, the first interspaces are buried with the insulating film. Thereafter, a metal film is deposited on the substrate, followed by chemical mechanical polishing till the gate electrode, gate interconnections, and side walls become exposed. By the process, withdrawn electrodes from a source/drain region for ccntact with the active region is formed by self alignment, while the withdrawn electrodes are insulated from the gate electrode and gate interconnections by the side walls.
    • 形成围绕半导体衬底的有源区的隔离。 分别在有源区和隔离层上形成栅电极和两侧栅极互连。 在栅极电极和栅极互连之间设置两个第一空间,每个空间的宽度小于指定值,第二空间的宽度大于指定值并插入在两个第一间隙之间。 在通过在衬底上沉积绝缘膜来形成栅电极的两个侧面上的侧壁和栅极互连时,第一间隙被绝缘膜掩埋。 然后,将金属膜沉积在基板上,然后进行化学机械抛光,直到栅极,栅极互连和侧壁变得暴露。 通过该处理,通过自对准来形成用于与有源区域成反射的源极/漏极区域的引出电极,而引出的电极通过侧壁与栅电极和栅极互连绝缘。
    • 65. 发明授权
    • Semiconductor device with a field-effect transistor having a lower
resistance impurity diffusion layer, and method of manufacturing the
same
    • 具有具有较低电阻杂质扩散层的场效应晶体管的半导体器件及其制造方法
    • US5733812A
    • 1998-03-31
    • US571131
    • 1995-12-12
    • Tetsuya UedaTakashi UeharaKousaku YanoSatoshi Ueda
    • Tetsuya UedaTakashi UeharaKousaku YanoSatoshi Ueda
    • H01L21/336H01L21/8234H01L29/417H01L21/265
    • H01L29/6659H01L21/823475H01L29/41775H01L29/41783H01L29/66545
    • There is formed an isolation which surrounds an active region of a semiconductor substrate. Formed over the active region and on the isolation, respectively, are a gate electrode and two gate interconnections on both sides thereof. Between the gate electrode and the gate interconnections are located two first interspaces each of which is smaller in width than a specified value and a second interspace which is larger in width than the specified value and interposed between the two first interspaces. In forming side walls on both side faces of the gate electrode and gate interconnections by depositing an insulating film on the substrate, the first interspaces are buried with the insulating film. Thereafter, a metal film is deposited on the substrate, followed by chemical mechanical polishing till the gate electrode, gate interconnections, and side walls become exposed. By the process, withdrawn electrodes from a source/drain region for contact with the active region is formed by self alignment, while the withdrawn electrodes are insulated from the gate electrode and gate interconnections by the side walls.
    • 形成围绕半导体衬底的有源区的隔离。 分别在有源区和隔离层上形成栅电极和两侧栅极互连。 在栅极电极和栅极互连之间设置两个第一空间,每个空间的宽度小于指定值,第二空间的宽度大于指定值并插入在两个第一间隙之间。 在通过在衬底上沉积绝缘膜来形成栅电极的两个侧面上的侧壁和栅极互连时,第一间隙被绝缘膜掩埋。 然后,将金属膜沉积在基板上,然后进行化学机械抛光,直到栅极,栅极互连和侧壁变得暴露。 通过该处理,通过自对准形成来自用于与有源区接触的源极/漏极区域的引出电极,而引出的电极通过侧壁与栅电极和栅极互连绝缘。
    • 68. 发明授权
    • Method for forming a multi-layer metallic wiring structure
    • 用于形成多层金属布线结构的方法
    • US5385867A
    • 1995-01-31
    • US216968
    • 1994-03-24
    • Tetsuya UedaKousaku YanoTomoyasu MurakamiMichinari YamanakaShuji HiraoNoboru Nomura
    • Tetsuya UedaKousaku YanoTomoyasu MurakamiMichinari YamanakaShuji HiraoNoboru Nomura
    • H01L21/3205H01L21/768H01L23/522H01L21/283H01L21/31
    • H01L21/76847H01L21/76844H01L21/76877H01L21/76885H01L23/5226H01L2924/0002Y10S438/948
    • After accumulating a BPSG film layer on a silicon substrate, a first Al--Si--Cu film layer, a W film layer and a second Al--Si--Cu film layer are successively accumulated on this BPSG film layer. A resist pattern with wide-width and narrow-width pattern portions is formed on the second Al--Si--Cu film layer. The wide-width pattern portion is provided at a position corresponding to a contact for connecting a first-layer metallic wiring and a second-layer metallic wiring, while the narrow-width pattern portion is provided at a position corresponding to a wiring portion for the first-layer metallic wiring. After applying first etching on the second Al--Si--Cu film layer with a mask of the resist patter, second etching is applied on the W film layer. Thereafter, by applying third etching, the resist pattern remaining on the first-layer metallic wiring is removed and the first Al--Si--Cu film layer is transfigured into a tall metallic film portion and a short metallic film portion. After accumulating an inter-layer insulating film layer on the first Al--Si--Cu film layer, etchback is applied on this inter-layer insulating film layer until the top of the tall metallic film portion is bared. Then, the second-layer metallic wiring is formed on the inter-layer insulating film layer so that the second-layer metallic wiring is connected with the tall metallic film portion.
    • 在硅衬底上积累BPSG膜层之后,第一Al-Si-Cu膜层,W膜层和第二Al-Si-Cu膜层依次堆积在该BPSG膜层上。 在第二Al-Si-Cu膜层上形成具有宽幅和窄宽图案部分的抗蚀剂图案。 宽幅图形部分设置在与用于连接第一层金属布线和第二层金属布线的接触件相对应的位置处,而窄宽图案部分设置在与布线部分相对应的位置处 第一层金属布线。 在具有抗蚀剂图案的掩模的第二Al-Si-Cu膜层上施加第一蚀刻之后,在W膜层上施加第二蚀刻。 此后,通过施加第三蚀刻,去除残留在第一层金属布线上的抗蚀剂图案,并将第一Al-Si-Cu膜层变形为高金属膜部分和短金属膜部分。 在第一Al-Si-Cu膜层上积累层间绝缘膜层之后,在该层间绝缘膜层上施加回蚀,直到高金属膜部分的顶部露出。 然后,在层间绝缘膜层上形成第二层金属布线,使得第二层金属布线与高金属膜部分连接。