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    • 8. 发明专利
    • Method for manufacturing semiconductor device
    • 制造半导体器件的方法
    • JP2013021305A
    • 2013-01-31
    • JP2012125788
    • 2012-06-01
    • Semiconductor Energy Lab Co Ltd株式会社半導体エネルギー研究所
    • SASAGAWA SHINYAFUJIKI HIROSHIIEDA YOSHINORI
    • H01L21/336H01L21/28H01L21/3065H01L21/314H01L21/768H01L23/532H01L29/786
    • H01L29/66969H01L21/02164H01L21/02178H01L21/02554H01L21/02565H01L21/47573H01L29/41733H01L29/66742H01L29/7869
    • PROBLEM TO BE SOLVED: To provide a semiconductor device which has high reliability and low contact resistance and is less apt to generate leakage current between a source and a drain.SOLUTION: A method for manufacturing the semiconductor device has the steps of: laminating and forming a first insulating film and a second insulating film provided to contact with an oxide semiconductor film on an electrode film of a transistor formed by the oxide semiconductor film; forming an etching mask on the second insulating film; forming an opening part exposing the electrode film by etching parts of the first and second insulating films overlapped with the opening part of the etching mask; removing the etching mask by exposing opening parts of the first and the second insulating films to argon plasma; and forming a conductive film on opening parts of the first and the second insulating films. The first insulating film is an insulating film in which a part of oxygen is desorbed by heating. The second insulating film is more hardly etched than the first insulating film and has a gas permeability being lower than that of the first insulating film. Alternatively a reverse sputtering may be performed.
    • 要解决的问题:提供具有高可靠性和低接触电阻并且不太容易在源极和漏极之间产生漏电流的半导体器件。 解决方案:制造半导体器件的方法包括以下步骤:在由氧化物半导体膜形成的晶体管的电极膜上层叠和形成设置成与氧化物半导体膜接触的第一绝缘膜和第二绝缘膜 ; 在所述第二绝缘膜上形成蚀刻掩模; 通过蚀刻与蚀刻掩模的开口部分重叠的第一和第二绝缘膜的部分,形成露出电极膜的开口部; 通过将第一和第二绝缘膜的开口部分暴露于氩等离子体来去除蚀刻掩模; 以及在所述第一和第二绝缘膜的开口部分上形成导电膜。 第一绝缘膜是其中一部分氧被加热解吸的绝缘膜。 第二绝缘膜比第一绝缘膜更难蚀刻,并且具有比第一绝缘膜低的透气性。 或者,可以进行反溅射。 版权所有(C)2013,JPO&INPIT