Silicon carbide semiconductor device
    1.
    发明授权
    Silicon carbide semiconductor device 有权
    碳化硅半导体器件

    公开(公告)号:US09000447B2

    公开(公告)日:2015-04-07

    申请号:US13613838

    申请日:2012-09-13

    摘要: A first layer has n type conductivity. A second layer is epitaxially formed on the first layer and having p type conductivity. A third layer is on the second layer and having n type conductivity. ND is defined to represent a concentration of a donor type impurity. NA is defined to represent a concentration of an acceptor type impurity. D1 is defined to represent a location in the first layer away from an interface between the first layer and the second layer in a depth direction. D1 in which 1≦ND/NA≦50 is satisfied is within 1 μm therefrom. A gate trench is provided to extend through the third layer and the second layer to reach the first layer. A gate insulating film covers a side wall of the gate trench. A gate electrode is embedded in the gate trench with the gate insulating film interposed therebetween.

    摘要翻译: 第一层具有n型导电性。 第二层外延形成在第一层上并具有p型导电性。 第三层位于第二层上,具有n型导电性。 ND被定义为表示供体型杂质的浓度。 NA被定义为表示受体型杂质的浓度。 D1被定义为在深度方向上表示远离第一层和第二层之间的界面的第一层中的位置。 其中满足1≦̸ ND / NA≦̸ 50的D1在其1μm以内。 提供栅极沟槽以延伸穿过第三层和第二层以到达第一层。 栅极绝缘膜覆盖栅极沟槽的侧壁。 栅极电极嵌入栅极沟槽中,栅极绝缘膜插入其间。

    METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE
    2.
    发明申请
    METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE 有权
    制造碳化硅半导体器件的方法

    公开(公告)号:US20130078771A1

    公开(公告)日:2013-03-28

    申请号:US13613858

    申请日:2012-09-13

    IPC分类号: H01L21/331

    摘要: A collector layer having p type is formed on a silicon carbide substrate having n type. A drift layer having n type is formed on a top surface side of the collector layer. A body region provided on the drift layer and having p type, and an emitter region provided on the body region to be separated from the drift layer by the body region and having n type are formed. A bottom surface side of the collector layer is exposed by removing the silicon carbide substrate.

    摘要翻译: 具有p型的集电极层形成在具有n型的碳化硅衬底上。 在集电体层的顶面侧形成有n型漂移层。 设置在漂移层上并具有p型的体区,并且形成设置在身体区域上以通过身体区域与移动层分离并具有n型的发射极区域。 通过去除碳化硅衬底来暴露集电极层的底表面侧。

    SILICON CARBIDE SEMICONDUCTOR DEVICE
    3.
    发明申请
    SILICON CARBIDE SEMICONDUCTOR DEVICE 有权
    硅碳化硅半导体器件

    公开(公告)号:US20130075759A1

    公开(公告)日:2013-03-28

    申请号:US13613838

    申请日:2012-09-13

    IPC分类号: H01L29/161

    摘要: A first layer has n type conductivity. A second layer is epitaxially formed on the first layer and having p type conductivity. A third layer is on the second layer and having n type conductivity. ND is defined to represent a concentration of a donor type impurity. NA is defined to represent a concentration of an acceptor type impurity. D1 is defined to represent a location in the first layer away from an interface between the first layer and the second layer in a depth direction. D1 in which 1≦ND/NA≦50 is satisfied is within 1 μm therefrom. A gate trench is provided to extend through the third layer and the second layer to reach the first layer. A gate insulating film covers a side wall of the gate trench. A gate electrode is embedded in the gate trench with the gate insulating film interposed therebetween.

    摘要翻译: 第一层具有n型导电性。 第二层外延形成在第一层上并具有p型导电性。 第三层位于第二层上,具有n型导电性。 ND被定义为表示供体型杂质的浓度。 NA被定义为表示受体型杂质的浓度。 D1被定义为在深度方向上表示远离第一层和第二层之间的界面的第一层中的位置。 其中满足1≦̸ ND / NA≦̸ 50的D1在其1μm以内。 提供栅极沟槽以延伸穿过第三层和第二层以到达第一层。 栅极绝缘膜覆盖栅极沟槽的侧壁。 栅极电极嵌入栅极沟槽中,栅极绝缘膜插入其间。

    METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE
    4.
    发明申请
    METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE 审中-公开
    制造碳化硅半导体器件的方法

    公开(公告)号:US20130065384A1

    公开(公告)日:2013-03-14

    申请号:US13613785

    申请日:2012-09-13

    IPC分类号: H01L21/336

    摘要: A mask layer is formed on a silicon carbide layer by a deposition method. The mask layer is patterned. A gate trench having a side wall is formed by removing a portion of the silicon carbide layer by etching using the patterned mask layer as a mask. A gate insulating film is formed on the side wall of the gate trench. A gate electrode is formed on the gate insulating film. The silicon carbide layer has one of hexagonal and cubic crystal types, and the side wall of the gate trench substantially includes one of a{0-33-8} plane and a {01-1-4} plane in a case where the silicon carbide layer is of hexagonal crystal type, and substantially includes a {100} plane in a case where the silicon carbide layer is of cubic crystal type.

    摘要翻译: 通过沉积方法在碳化硅层上形成掩模层。 掩模层被图案化。 通过使用图案化掩模层作为掩模的蚀刻去除碳化硅层的一部分来形成具有侧壁的栅极沟槽。 栅极绝缘膜形成在栅极沟槽的侧壁上。 在栅极绝缘膜上形成栅电极。 碳化硅层具有六方晶体和立方晶体中的一种,栅极沟槽的侧壁基本上包括{0-33-8}面和{01-1-4}面之一,在硅 碳化物层为六方晶系,并且在碳化硅层为立方晶型的情况下,基本上包含{100}面。

    Silicon carbide semiconductor device and method for manufacturing same
    9.
    发明授权
    Silicon carbide semiconductor device and method for manufacturing same 有权
    碳化硅半导体器件及其制造方法

    公开(公告)号:US08564017B2

    公开(公告)日:2013-10-22

    申请号:US13485423

    申请日:2012-05-31

    摘要: A drift layer has a thickness direction throughout which a current flows and has an impurity concentration N1d for a first conductivity type. A body region is provided on a portion of the drift layer, has a channel to be switched by a gate electrode, has an impurity concentration N1b for the first conductivity type, and has an impurity concentration N2b for the second conductivity type greater than the impurity concentration N1b. A JFET region is disposed adjacent to the body region on the drift layer, has an impurity concentration N1j for the first conductivity type, and has an impurity concentration N2j for the second conductivity type smaller than the impurity concentration N1j. N1j−N2j>N1d and N2j

    摘要翻译: 漂移层具有电流流动的厚度方向,并具有用于第一导电类型的杂质浓度N1d。 身体区域设置在漂移层的一部分上,具有由栅电极切换的通道,具有用于第一导电类型的杂质浓度N1b,并且具有大于杂质的第二导电类型的杂质浓度N2b 浓度N1b。 JFET区域与漂移层上的体区附近配置,对于第一导电类型具有杂质浓度N1j,并且对于第二导电类型的杂质浓度N2j小于杂质浓度N1j。 N1j-N2j> N1d和N2j