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    • 1. 发明授权
    • Method and apparatus for forming metal-metal oxide etch stop/barrier for integrated circuit interconnects
    • 用于形成用于集成电路互连的金属 - 金属氧化物蚀刻停止/屏障的方法和装置
    • US07727892B2
    • 2010-06-01
    • US10255930
    • 2002-09-25
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • H01L21/311
    • H01L21/76849H01L21/76829H01L21/76834H01L21/76855H01L21/76888H01L21/76897H01L23/53238H01L2924/0002H01L2924/00
    • Described is a method and apparatus for forming interconnects with a metal-metal oxide electromigration barrier and etch-stop. In one embodiment of the invention, the method includes depositing a metal layer on the top of a planarized interconnect layer, the interconnect layer having an interlayer dielectric (ILD) with a top that is planar with the top of an electrically conductive interconnect. In one embodiment of the invention, the method includes reacting the metal layer with the ILD to form a metal oxide layer on the top of the ILD. At the same time, the metal layer will not be significantly oxidized by the electrically conductive interconnect, thus forming a metal barrier on the electrically conductive interconnect to improve electromigration performance. The metal barrier and metal oxide layer together comprise a protective layer. A second ILD may be subsequently formed on the protective layer, and the protective layer may act an etch-stop during a subsequent etch of the second ILD.
    • 描述了用于与金属 - 金属氧化物电迁移屏障和蚀刻停止形成互连的方法和装置。 在本发明的一个实施例中,该方法包括在平坦化的互连层的顶部上沉积金属层,所述互连层具有层间电介质(ILD),其顶部与导电互连的顶部是平面的。 在本发明的一个实施方案中,该方法包括使金属层与ILD反应以在ILD的顶部形成金属氧化物层。 同时,金属层不会被导电互连显着地氧化,从而在导电互连上形成金属阻挡层以改善电迁移性能。 金属屏障和金属氧化物层一起包括保护层。 随后可以在保护层上形成第二ILD,并且保护层可以在随后的第二ILD蚀刻期间进行蚀刻停止。
    • 3. 发明授权
    • Method and apparatus for forming metal-metal oxide etch stop/barrier for integrated circuit interconnects
    • 用于形成用于集成电路互连的金属 - 金属氧化物蚀刻停止/屏障的方法和装置
    • US08299617B2
    • 2012-10-30
    • US12763038
    • 2010-04-19
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • H01L29/40
    • H01L21/76849H01L21/76829H01L21/76834H01L21/76855H01L21/76888H01L21/76897H01L23/53238H01L2924/0002H01L2924/00
    • Described is a method and apparatus for forming interconnects with a metal-metal oxide electromigration barrier and etch-stop. In one embodiment of the invention, the method includes depositing a metal layer on the top of a planarized interconnect layer, the interconnect layer having an interlayer dielectric (ILD) with a top that is planar with the top of an electrically conductive interconnect. In one embodiment of the invention, the method includes reacting the metal layer with the ILD to form a metal oxide layer on the top of the ILD. At the same time, the metal layer will not be significantly oxidized by the electrically conductive interconnect, thus forming a metal barrier on the electrically conductive interconnect to improve electromigration performance. The metal barrier and metal oxide layer together comprise a protective layer. A second ILD may be subsequently formed on the protective layer, and the protective layer may act an etch-stop during a subsequent etch of the second ILD.
    • 描述了用于与金属 - 金属氧化物电迁移屏障和蚀刻停止形成互连的方法和装置。 在本发明的一个实施例中,该方法包括在平坦化的互连层的顶部上沉积金属层,所述互连层具有层间电介质(ILD),其顶部与导电互连的顶部是平面的。 在本发明的一个实施方案中,该方法包括使金属层与ILD反应以在ILD的顶部形成金属氧化物层。 同时,金属层不会被导电互连显着地氧化,从而在导电互连上形成金属阻挡层以改善电迁移性能。 金属屏障和金属氧化物层一起包括保护层。 随后可以在保护层上形成第二ILD,并且保护层可以在随后的第二ILD蚀刻期间进行蚀刻停止。
    • 5. 发明授权
    • Metal-metal oxide etch stop/barrier for integrated circuit interconnects
    • 用于集成电路互连的金属 - 金属氧化物蚀刻停止/屏障
    • US07339271B2
    • 2008-03-04
    • US10861657
    • 2004-06-03
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • Xiaorong MorrowJihperng LeuMarkus KuhnJose A. Maiz
    • H01L23/52
    • H01L21/76849H01L21/76829H01L21/76834H01L21/76855H01L21/76888H01L21/76897H01L23/53238H01L2924/0002H01L2924/00
    • Described is a method and apparatus for forming interconnects with a metal-metal oxide electromigration barrier and etch-stop. In one embodiment of the invention, the method includes depositing a metal layer on the top of a planarized interconnect layer, the interconnect layer having an interlayer dielectric (ILD) with a top that is planar with the top of an electrically conductive interconnect. In one embodiment of the invention, the method includes reacting the metal layer with the ILD to form a metal oxide layer on the top of the ILD. At the same time, the metal layer will not be significantly oxidized by the electrically conductive interconnect, thus forming a metal barrier on the electrically conductive interconnect to improve electromigration performance. The metal barrier and metal oxide layer together comprise a protective layer. A second ILD may be subsequently formed on the protective layer, and the protective layer may act an etch-stop during a subsequent etch of the second ILD.
    • 描述了用于与金属 - 金属氧化物电迁移屏障和蚀刻停止形成互连的方法和装置。 在本发明的一个实施例中,该方法包括在平坦化的互连层的顶部上沉积金属层,所述互连层具有层间电介质(ILD),其顶部与导电互连的顶部是平面的。 在本发明的一个实施方案中,该方法包括使金属层与ILD反应以在ILD的顶部形成金属氧化物层。 同时,金属层不会被导电互连显着地氧化,从而在导电互连上形成金属阻挡层以改善电迁移性能。 金属屏障和金属氧化物层一起包括保护层。 随后可以在保护层上形成第二ILD,并且保护层可以在随后的第二ILD蚀刻期间进行蚀刻停止。