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    • 2. 发明授权
    • Semiconductor device having SiGe channel region
    • 具有SiGe沟道区的半导体器件
    • US07205586B2
    • 2007-04-17
    • US10851073
    • 2004-05-24
    • Takeshi TakagiAkira Inoue
    • Takeshi TakagiAkira Inoue
    • H01L31/072
    • H01L29/1054H01L21/84H01L27/1203H01L29/161H01L29/165H01L29/7782H01L29/783H01L29/78615H01L29/78648H01L29/78687
    • A HDTMOS includes a Si substrate, a buried oxide film and a semiconductor layer. The semiconductor layer includes an upper Si film, an epitaxially grown Si buffer layer, an epitaxially grown SiGe film, and an epitaxially grown Si film. Furthermore, the HDTMOS includes an n-type high concentration Si body region, an n− Si region, a SiGe channel region containing n-type low concentration impurities, an n-type low concentration Si cap layer, and a contact which is a conductor member for electrically connecting the gate electrode and the Si body region. The present invention extends the operation range while keeping the threshold voltage small by using, for the channel layer, a material having a smaller potential at the band edge where carriers travel than that of a material constituting the body region.
    • HDTMOS包括Si衬底,掩埋氧化物膜和半导体层。 半导体层包括上硅膜,外延生长的Si缓冲层,外延生长的SiGe膜和外延生长的Si膜。 此外,HDTMOS包括n型高浓度Si体区域,n + Si区域,含有n型低浓度杂质的SiGe沟道区域,n型低浓度Si覆盖层, 以及作为用于电连接栅电极和Si体区的导体构件的接触。 本发明通过在沟道层使用载流子行进的带边缘处的电位较小的材料,而不是构成体区的材料的情况下,使阈值电压保持较小。
    • 3. 发明授权
    • Heterojunction field effect transistor
    • 异质结场效应晶体管
    • US06781163B2
    • 2004-08-24
    • US10311293
    • 2002-12-17
    • Takeshi TakagiAkira Inoue
    • Takeshi TakagiAkira Inoue
    • H01L310328
    • H01L29/802H01L21/823807H01L29/1054H01L29/165H01L29/78687
    • A region of an Si layer (15) located between source and drain regions (19 and 20) is an Si body region (21) which contains an n-type impurity of high concentration. An Si layer (16) and an SiGe layer (17) are, in an as grown state, undoped layers into which no n-type impurity is doped. Regions of the Si layer 16 and the SiGe layer (17) located between the source and drain regions (19 and 20) are an Si buffer region (22) and an SiGe channel region (23), respectively, which contain the n-type impurity of low concentration. A region of an Si film (18) located directly under a gate insulating film (12) is an Si cap region (24) into which a p-type impurity (5×1017 atoms·cm−3) is doped. Accordingly, a semiconductor device in which an increase in threshold voltage is suppressed can be achieved.
    • 位于源极和漏极区域(19和20)之间的Si层(15)的区域是包含高浓度的n型杂质的Si体区域(21)。 处于生长状态的Si层(16)和SiGe层(17)是未掺杂n型杂质的未掺杂层。 位于源极和漏极区域(19和20)之间的Si层16和SiGe层(17)的区域分别是包含n型的Si缓冲区(22)和SiGe沟道区(23) 低浓度的杂质。 位于栅极绝缘膜(12)正下方的Si膜(18)的区域是掺杂有p型杂质(5×10 17原子·cm -3)的Si帽区域(24)。 因此,可以实现抑制阈值电压增加的半导体装置。
    • 4. 发明授权
    • CMOS and HCMOS semiconductor integrated circuit
    • CMOS和HCMOS半导体集成电路
    • US07564073B2
    • 2009-07-21
    • US11294566
    • 2005-12-06
    • Haruyuki SoradaAkira AsaiTakeshi TakagiAkira InoueYoshio Kawashima
    • Haruyuki SoradaAkira AsaiTakeshi TakagiAkira InoueYoshio Kawashima
    • H01L27/04
    • H01L21/823807
    • A semiconductor integrated circuit fabrication method according to this invention includes: a step of forming a pair of first device forming regions and a pair of second device forming regions in a surface layer portion of a semiconductor substrate by surrounding each of the regions by device isolation; a step of forming a first oxide film covering the surface of the semiconductor substrate after the preceding step; a step of removing an intended portion of the first oxide film to expose the pair of second device forming regions; a step of forming a pair of heterojunction structures, by selective epitaxial growth, on the pair of second device forming regions thus exposed; a step of forming a second oxide film covering the surface of the substrate after the preceding step; and a step of forming a pair of gate electrodes above each of the pair of first device forming regions and the pair of second device forming regions, whereby a normal complementary MOS transistor and a heterojunction complementary MOS transistor are eventually formed in the pair of first device forming regions and the pair of second device forming regions, respectively.
    • 根据本发明的半导体集成电路制造方法包括:通过器件隔离来围绕每个区域来在半导体衬底的表面层部分中形成一对第一器件形成区域和一对第二器件形成区域的步骤; 在前述步骤之后形成覆盖半导体衬底的表面的第一氧化物膜的步骤; 去除所述第一氧化物膜的预期部分以暴露所述一对第二器件形成区域的步骤; 通过选择性外延生长形成一对异质结结构在由此露出的一对第二器件形成区上的步骤; 在上述步骤之后形成覆盖基板表面的第二氧化膜的步骤; 以及在所述一对第一器件形成区域和所述一对第二器件形成区域中的每一个上形成一对栅电极的步骤,由此在所述一对第一器件形成区域中最终形成正常互补MOS晶体管和异质结互补MOS晶体管 形成区域和一对第二装置形成区域。
    • 5. 发明授权
    • Semiconductor device and method for fabricating the same
    • 半导体装置及其制造方法
    • US07084026B2
    • 2006-08-01
    • US10913383
    • 2004-08-09
    • Takeshi TakagiAkira Inoue
    • Takeshi TakagiAkira Inoue
    • H01L21/8238H01L21/336
    • H01L29/802H01L21/823807H01L29/1054H01L29/165H01L29/78687
    • A region of an Si layer 15 located between source and drain regions 19 and 20 is an Si body region 21 which contains an n-type impurity of high concentration. An Si layer 16 and an SiGe layer 17 are, in an as grown state, undoped layers into which no n-type impurity is doped. Regions of the Si layer 16 and the SiGe layer 17 located between the source and drain regions 19 and 20 are an Si buffer region 22 and an SiGe channel region 23, respectively, which contain the n-type impurity of low concentration. A region of an Si film 18 located directly under a gate insulating film 12 is an Si cap region 24 into which a p-type impurity (5×1017 atoms·cm−3) is doped. Accordingly, a semiconductor device in which an increase in threshold voltage is suppressed can be achieved.
    • 位于源区和漏区19和20之间的Si层15的区域是含有高浓度的n型杂质的Si体区21。 处于生长状态的Si层16和SiGe层17未掺杂n型杂质的未掺杂层。 位于源区和漏区19和20之间的Si层16和SiGe层17的区域分别是含有低浓度的n型杂质的Si缓冲区22和SiGe沟道区23。 位于栅极绝缘膜12正下方的Si膜18的区域是Si帽区域24,其中p型杂质(5×10 17原子%-3重量% )掺杂。 因此,可以实现抑制阈值电压增加的半导体装置。