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    • 6. 发明申请
    • SEMICONDUCTOR DEVICE WITH EFFECTIVE WORK FUNCTION CONTROLLED METAL GATE
    • 具有有效工作功能的半导体器件控制金属栅
    • US20120049281A1
    • 2012-03-01
    • US12870011
    • 2010-08-27
    • Yoshinori TsuchiyaRyosuke IijimaAtsushi Yagishita
    • Yoshinori TsuchiyaRyosuke IijimaAtsushi Yagishita
    • H01L27/12H01L21/762
    • H01L29/785H01L29/66795
    • According to one embodiment, gate electrodes of a multi-gate field effect transistors and methods of making a gate electrode of a multi-gate field effect transistor are provided. The gate electrode can contain a semiconductor substrate; a dielectric layer over the semiconductor substrate; a fin over the dielectric layer; a gate insulating layer over the side surfaces of the fin; a gate electrode layer over the fin; and a polysilicon layer over the fin. The gate electrode does not contain a gate insulating layer over the upper surface of the dielectric layer except portions of the upper surface of the dielectric layer that contact with the side surfaces of the gate insulating layer formed over the side surface of the fin. In another embodiment, the gate electrode can contain an oxygen diffusion barrier layer or a first oxygen diffusion layer over the upper surface of the dielectric layer.
    • 根据一个实施例,提供了多栅极场效应晶体管的栅极和制造多栅极场效应晶体管的栅电极的方法。 栅电极可以包含半导体衬底; 半导体衬底上的电介质层; 电介质层上的翅片; 在翅片的侧表面上的栅极绝缘层; 翅片上的栅极电极层; 和鳍上的多晶硅层。 栅电极除电介质层上表面的与栅极侧表面上形成的栅极绝缘层的侧面接触的部分以外,在电介质层的上表面上不包含栅极绝缘层。 在另一个实施例中,栅电极可以在电介质层的上表面上包含氧扩散阻挡层或第一氧扩散层。
    • 8. 发明授权
    • Semiconductor device and method of fabricating the same
    • 半导体装置及其制造方法
    • US07723171B2
    • 2010-05-25
    • US12078585
    • 2008-04-02
    • Atsushi YagishitaAkio KanekoKazunari Ishimaru
    • Atsushi YagishitaAkio KanekoKazunari Ishimaru
    • H01L21/336
    • H01L29/785H01L21/28097H01L21/823431H01L27/0886H01L29/66795H01L29/6681H01L29/7851
    • According to the present invention, there is provided a semiconductor device fabrication method, comprising:depositing a mask material on a semiconductor substrate;patterning the mask material and forming a trench in a surface portion of the semiconductor substrate by etching, thereby forming a first projection in a first region, and a second projection wider than the first projection in a second region;burying a device isolation insulating film in the trench;etching away a predetermined amount of the device isolation insulating film formed in the first region;etching away the mask material formed in the second region;forming a first gate insulating film on a pair of opposing side surfaces of the first projection, and a second gate insulating film on an upper surface of the second projection;depositing a first gate electrode material on the device isolation insulating film, mask material, and second gate insulating film;planarizing the first gate electrode material by using as stoppers the mask material formed in the first region and the device isolation insulating film formed in the second region;depositing a second gate electrode material on the mask material, first gate electrode material, and device isolation insulating film; andpatterning the first and second gate electrode materials, thereby forming a first gate electrode in the first region, and a second gate electrode in the second region.
    • 根据本发明,提供了一种半导体器件制造方法,包括:在半导体衬底上沉积掩模材料; 图案化掩模材料并通过蚀刻在半导体衬底的表面部分中形成沟槽,从而在第一区域中形成第一突起,在第二区域形成比第一突起宽的第二突起; 在沟槽中埋设器件隔离绝缘膜; 蚀刻形成在第一区域中的预定量的器件隔离绝缘膜; 蚀刻形成在第二区域中的掩模材料; 在所述第一突起的一对相对的侧面上形成第一栅极绝缘膜,在所述第二突起的上表面上形成第二栅极绝缘膜; 在器件隔离绝缘膜,掩模材料和第二栅极绝缘膜上沉积第一栅电极材料; 通过使用形成在第一区域中的掩模材料和形成在第二区域中的器件隔离绝缘膜作为阻挡层来平坦化第一栅电极材料; 在掩模材料上沉积第二栅电极材料,第一栅电极材料和器件隔离绝缘膜; 以及对第一和第二栅电极材料进行构图,从而在第一区域形成第一栅电极,在第二区域形成第二栅电极。