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    • 2. 发明专利
    • Silicon carbide semiconductor device and manufacturing method of the same
    • 硅碳化硅半导体器件及其制造方法
    • JP2014110362A
    • 2014-06-12
    • JP2012264901
    • 2012-12-04
    • Mitsubishi Electric Corp三菱電機株式会社
    • OKABE HIROAKINAKANISHI YOSUKEYOSHIDA MOTOITOMINAGA TAKAAKI
    • H01L21/28H01L21/3205H01L21/336H01L21/768H01L23/532H01L29/12H01L29/78
    • H01L2924/0002H01L2924/00
    • PROBLEM TO BE SOLVED: To provide an SiC semiconductor device which inhibits film peeling of a Cu electrode and has a high diffusion prevention effect of Cu on an element structure part; and provide a manufacturing method of the SiC semiconductor device.SOLUTION: A silicon carbide semiconductor device manufacturing method of the present embodiment comprises: (a) a process of forming a barrier metal 13 on a silicon carbide semiconductor element; (b) a process of forming on the barrier metal 13, a Cu electrode 12 in which an end of a contact surface with the barrier metal 13 is retracted behind an end of the barrier metal 13; and (c) a process of performing anisotropic etching on the barrier metal 13 in a vertical direction by using a Cu electrode 12 as a mask. The process (b) is a process of forming the Cu electrode 12 in a manner such that a width of at least a part other than a bottom which contacts the barrier metal 13 becomes wider than a width of the bottom.
    • 要解决的问题:提供一种抑制Cu电极的膜剥离并且对元件结构部分具有高扩散防止效果的SiC半导体器件; 并提供SiC半导体器件的制造方法。本实施例的碳化硅半导体器件制造方法包括:(a)在碳化硅半导体元件上形成阻挡金属13的工艺; (b)在阻挡金属13上形成有与阻挡金属13的接触表面的端部缩回阻挡金属13的端部后方的Cu电极12的工序; 以及(c)通过使用Cu电极12作为掩模在垂直方向上对阻挡金属13进行各向异性蚀刻的工序。 方法(b)是以使得与阻挡金属13接触的底部以外的至少一部分的宽度比底部的宽度变宽的方式形成Cu电极12的工序。
    • 4. 发明专利
    • Producing method of silicon carbide semiconductor device
    • 生产碳化硅半导体器件的方法
    • JP2009260115A
    • 2009-11-05
    • JP2008108780
    • 2008-04-18
    • Mitsubishi Electric Corp三菱電機株式会社
    • SAWADA TAKAOHAMANO KENICHIOKABE HIROAKI
    • H01L21/265H01L21/336H01L29/12H01L29/78
    • PROBLEM TO BE SOLVED: To provide a producing method of silicon carbide semiconductor device for continuously performing steps up to annealing from carbon protecting film formation within one producing apparatus by reducing impurity mixture into the carbon protecting film for preventing step bunching and defects on the carbon protecting film and a silicon carbide wafer in view of obtaining a producing method of silicon carbide semiconductor device for realizing stability in quality, improvement in producing yield, and reduction in producing cost of the silicon carbide semiconductor device. SOLUTION: A step of forming the carbon protecting film 6 on the entire surface of the silicon carbide wafer 24 by supplying hydrogen carbide gas including oxygen for thermal decomposition of the hydrogen carbide gas including oxygen under the evacuated condition and a step of conducting an annealing process to the silicon carbide wafer 24 with the carbon protecting film 6 formed thereon under the evacuated condition by stopping supply of the hydrogen carbide gas including oxygen and supplying an inactive gas are performed continuously within one film forming and annealing apparatus. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种碳化硅半导体器件的制造方法,用于通过将杂质混合物减少到用于防止步骤聚集的碳保护膜和缺陷的连续进行到一个制造装置内的碳保护膜形成退火的步骤 考虑到获得碳化硅半导体器件的制造方法,用于实现质量的稳定性,提高生产率,降低碳化硅半导体器件的成本,从而确保了碳保护膜和碳化硅晶片。 解决方案:通过在抽真空条件下提供包括氧在内的包含氧的碳氢化合物气体的包含氧的碳氢化合物,在碳化硅晶片24的整个表面上形成碳保护膜6的步骤, 在一个成膜和退火装置内连续地进行通过停止包括氧气的碳氢化合物供应和供给惰性气体在抽真空条件下形成的碳保护膜6的碳化硅晶片24的退火处理。 版权所有(C)2010,JPO&INPIT
    • 6. 发明专利
    • Semiconductor device and method of manufacturing the same
    • 半导体器件及其制造方法
    • JP2014146762A
    • 2014-08-14
    • JP2013015885
    • 2013-01-30
    • Mitsubishi Electric Corp三菱電機株式会社
    • YOSHIDA MOTOIOKABE HIROAKI
    • H01L29/41H01L21/3205H01L21/768H01L23/532H01L29/47H01L29/872
    • H01L2924/0002H01L2924/00
    • PROBLEM TO BE SOLVED: To provide a semiconductor device which has a Cu wiring electrode and is improved in reliability by suppressing a filling failure of a surface protective film made of an organic resin of the semiconductor device with a configuration manufacturable by a simple process, and to provide a method of manufacturing the same.SOLUTION: The Cu wiring electrode on a semiconductor element comprises a first metal layer 10 and a second metal layer 11 which contain Cu as a main component. A side surface of the first metal layer 10 protrudes more than a side surface 18 of a bottom part of the second metal layer 11. A protrusion 15 of the first metal layer 10 is provided at a skirt part 17 of the Cu wiring electrode to obtain a structure for suppressing a filling failure of a surface protective film 12 made of an organic resin at the skirt part 17 of the Cu wiring electrode by a simple manufacturing process, thereby obtaining the highly reliable semiconductor device.
    • 要解决的问题:提供一种具有Cu布线电极并通过抑制由半导体器件的有机树脂制成的表面保护膜的填充故障而具有通过简单工艺制造的构造而提高可靠性的半导体器件,以及 以提供其制造方法。解决方案:半导体元件上的Cu布线电极包括含有Cu作为主要成分的第一金属层10和第二金属层11。 第一金属层10的侧表面比第二金属层11的底部的侧面18突出。第一金属层10的突起15设置在Cu布线电极的裙部17处,以获得 通过简单的制造工艺在Cu布线电极的裙部17处抑制由有机树脂制成的表面保护膜12的填充故障的结构,从而获得高可靠性的半导体器件。
    • 7. 发明专利
    • Silicon carbide semiconductor device manufacturing method and silicon carbide semiconductor device
    • 硅碳化硅半导体器件制造方法和硅碳化硅半导体器件
    • JP2014116365A
    • 2014-06-26
    • JP2012267503
    • 2012-12-06
    • Mitsubishi Electric Corp三菱電機株式会社
    • NAKANISHI YOSUKEOKABE HIROAKIYOSHIDA MOTOISUGAHARA KAZUYUKITOMINAGA TAKAAKI
    • H01L21/28
    • PROBLEM TO BE SOLVED: To provide a silicon carbide semiconductor device manufacturing method which can suppress increase in the number of manufacturing processes and inhibit deterioration in ohmic characteristics of an alloy layer to a semiconductor substrate.SOLUTION: A silicon carbide semiconductor device manufacturing method comprises: a process of forming a metal layer 30 composed of a first metal on a semiconductor substrate 11 composed of a silicon carbide; a process of forming on the metal layer 30, a metal nitride film 40 obtained by nitriding of a second metal; a process of irradiating laser beams to form an alloy layer 31 of the silicon carbide of the semiconductor substrate 11 and the first metal of the metal layer 30 via the metal nitride film 40; and a process of forming an electrode 20 on the metal nitride film 40.
    • 要解决的问题:提供一种碳化硅半导体器件的制造方法,其可以抑制制造工艺数量的增加并且抑制合金层对半导体衬底的欧姆特性的劣化。解决方案:一种碳化硅半导体器件制造方法,包括: 在由碳化硅构成的半导体基板11上形成由第一金属构成的金属层30的工序; 在金属层30上形成通过氮化第二金属获得的金属氮化物膜40的工艺; 照射激光束的方法,通过金属氮化物膜40形成半导体衬底11的碳化硅的合金层31和金属层30的第一金属; 以及在金属氮化物膜40上形成电极20的工序。
    • 8. 发明专利
    • Method for manufacturing silicon-carbide semiconductor device
    • 制造硅碳化硅半导体器件的方法
    • JP2010245260A
    • 2010-10-28
    • JP2009091973
    • 2009-04-06
    • Mitsubishi Electric Corp三菱電機株式会社
    • OKABE HIROAKI
    • H01L29/12H01L21/336H01L29/78
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing a silicon-carbide semiconductor device suppressing degradation of current leakage characteristics and contributing to stabilization of quality and improvement of yield by improving adhesiveness between a silicon-carbide wafer and a carbon protective film formed on a surface of the silicon-carbide wafer and preventing step bunching. SOLUTION: The method includes the steps of: forming an oxidized film (6) on surfaces of silicon-carbide wafers (1, 2) in an oxidizing gas atmosphere or in an oxidizing solution; removing the oxidized film (6) in a reducing gas atmosphere; and forming the carbon protective film 7 on the surfaces of the silicon-carbide wafers (1, 2) from which the oxidized film (6) is removed in a silicon-carbide gas atmosphere. COPYRIGHT: (C)2011,JPO&INPIT
    • 解决方案:提供一种制造碳化硅半导体器件的方法,该方法通过提高碳化硅晶片和碳保护膜之间的粘附性来抑制电流泄漏特性的劣化并有助于质量的稳定和产量的提高 形成在碳化硅晶片的表面上并防止步骤聚束。 解决方案:该方法包括以下步骤:在氧化气体气氛或氧化溶液中在碳化硅晶片(1,2)的表面上形成氧化膜(6); 在还原气体气氛中除去氧化膜(6); 并在碳化硅气氛中除去氧化膜(6)的碳化硅晶片(1,2)的表面上形成碳保护膜7。 版权所有(C)2011,JPO&INPIT
    • 9. 发明专利
    • Silicon carbide schottky barrier diode manufacturing method
    • 碳化硅肖特彼勒二极管制造方法
    • JP2014107345A
    • 2014-06-09
    • JP2012257678
    • 2012-11-26
    • Mitsubishi Electric Corp三菱電機株式会社
    • YOSHIDA MOTOIOKABE HIROAKITOMINAGA TAKAAKI
    • H01L21/329H01L29/47H01L29/872
    • PROBLEM TO BE SOLVED: To provide a silicon carbide Schottky barrier diode without using dry etching which causes plasma damage on a silicon carbide semiconductor element.SOLUTION: A silicon carbide Schottky barrier diode of the present embodiment comprises: a process of forming an epitaxial layer 4 on a principal surface of a silicon carbide substrate 1 having the principal surface and a rear face; a process of forming a Schottky electrode layer 5 on a top face of the epitaxial layer 4; a process of forming a barrier metal layer 6 on the Schottky electrode layer 5; a process of forming an ohmic electrode layer 7 on the rear face of the silicon carbide substrate 1; a process of forming a rear face protection layer 8 in an underlayer of the ohmic electrode layer 7; a process of patterning a resist on the barrier metal layer 6 after forming the Schottky electrode layer 5, the barrier metal layer 6, the ohmic electrode layer 7 and the rear face protection layer 8 and patterning the Schottky electrode layer 5 and the barrier metal layer 6 by wet etching; and a process of forming a surface external output electrode 10 above the barrier metal layer 6.
    • 要解决的问题:提供碳化硅肖特基势垒二极管而不使用在碳化硅半导体元件上造成等离子体损伤的干蚀刻。本实施例的碳化硅肖特基势垒二极管包括:形成外延层4的工艺 在具有主表面和后表面的碳化硅衬底1的主表面上; 在外延层4的顶面上形成肖特基电极层5的工序; 在肖特基电极层5上形成阻挡金属层6的工序; 在碳化硅基板1的背面形成欧姆电极层7的工序; 在欧姆电极层7的底层形成背面保护层8的工序; 在形成肖特基电极层5,阻挡金属层6,欧姆电极层7和背面保护层8之后,在阻挡金属层6上形成抗蚀剂的工艺,并将肖特基电极层5和阻挡金属层 6通过湿蚀刻; 以及在阻挡金属层6上方形成表面外部输出电极10的工序。