Transistor having stress-producing dielectric element underlying entire undersurface of active semiconductor region
    2.
    发明专利
    Transistor having stress-producing dielectric element underlying entire undersurface of active semiconductor region 有权
    在有源半导体区域的整个表面下具有应力产生电介质元件的晶体管

    公开(公告)号:JP2007158323A

    公开(公告)日:2007-06-21

    申请号:JP2006311038

    申请日:2006-11-17

    Abstract: PROBLEM TO BE SOLVED: To provide a transistor having a stress-producing dielectric element which underlies the entire undersurface of an active semiconductor region.
    SOLUTION: A compressive stress is applied to a channel region of a PFET by a structure including an independent stress-producing dielectric element that entirely underlies the bottom surface of an active semiconductor region in which a source, a drain and a channel region of the PFET are disposed. Specifically, the stress-producing dielectric element includes a region of a collapsed oxide which contacts the entire bottom surface of the active semiconductor region so that it has an area of the same spread as an area of the bottom surface. Bird beak-like oxide regions at the edges of the stress-producing dielectric element apply an upward force to the edges of the stress-producing dielectric element to provide a compressive stress to the channel region of the PFET.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种具有产生应力的介电元件的晶体管,其在有源半导体区域的整个下表面的下方。 解决方案:通过包括独立的产生应力的电介质元件的结构将压应力施加到PFET的沟道区域,该电介质元件完全位于有源半导体区域的底表面之下,其中源极,漏极和沟道区域 的PFET。 具体而言,应力产生用电介质元件包括与活性半导体区域的整个底面接触的塌陷氧化物的区域,使得其具有与底面的面积相同的面积。 产生应力的电介质元件边缘处的鸟形喙状氧化物区向产生应力的电介质元件的边缘施加向上的力,以向PFET的沟道区提供压缩应力。 版权所有(C)2007,JPO&INPIT

    Strain release in PFET regions
    3.
    发明专利

    公开(公告)号:GB2550740B

    公开(公告)日:2020-05-20

    申请号:GB201712260

    申请日:2016-01-04

    Applicant: IBM

    Abstract: A method for fabricating a semiconductor device, includes providing a strained silicon on insulator (SSOI) structure, the SSOI structure comprises, a dielectric layer disposed on a substrate, a silicon germanium layer disposed on the dielectric layer, and a strained semiconductor material layer disposed directly on the silicon germanium layer, forming a plurality of fins on the SSOI structure, forming a gate structure over a portion of at least one fin in a nFET region, forming a gate structure over a portion of at least one fin in a pFET region, removing the gate structure over the portion of the at least one fin in the pFET region, removing the silicon germanium layer exposed by the removing, and forming a new gate structure over the portion of the at least one fin in the pFET region, such that the new gate structure surrounds the portion on all four sides.

    METHOD OF FORMING STRAINED SILICON ON INSULATOR AND STRUCTURES FORMED THEREBY

    公开(公告)号:MY134036A

    公开(公告)日:2007-11-30

    申请号:MYPI20021065

    申请日:2002-03-25

    Applicant: IBM

    Inventor: KERN RIM

    Abstract: A SOI STRUCTURE AND A METHOD FOT ITS FABRICATION, IN WHICH A STRAINED SILICON LAYER LIES DIRECTLY ON AN INSULATOR LAYER, CONTRARY TO THE PRIOR REQUIREMENT FOR STRAINED-Si LAYERS TO LIE DIRECTLY ON A STRAIN-INDUCING (E.G., SiGe) LAYER. THE METHOD GENERALLY ENTAILS THE FORMING A SILICON LAYER ON A STRAIN-INDUCING LAYER SO AS TO FORM A MULTILAYER STRUCTURE, IN WHICH THE STRAIN-INDUCING LAYER HAS A DIFFERENT LATTICE CONSTANT THAN SILICON SO THAT THE SILICON LAYER IS STRAINED AS A RESULT OF THE LATTICE MISMATCH WITH THE STRAIN-INDUCING LAYER. THE MULTILAYER STRUCTURE IS THEN BONDED TO A SUBSTRATE SO THAT AN INSULATING LAYER IS BETWEEN THE STRAINED SILICON LAYER AND THE SUBSTRATE, AND SO THAT THE STRAINED SILICON LAYER DIRECTLY CONTACTS THE INSULATING LAYER. THE STRAIN-INDUCING LAYER IS THEN REMOVED TO EXPOSE A SURFACE OF THE STRAINED SILICON LAYER AND YIELD A STRAINED SILICON-ON-INSULATOR STRUCTURE THAT COMPRISES THE SUBSTRATE, THE INSULATING LAYER ON THE SUBSTRATE, AND THE STRAINED SILICON LAYER ON THE INSULATING LAYER. AS A RESULT, THE METHOD YIELDS A STRAINED SILICON-ON-INSULATOR (SSOI) STRUCTURE IN WHICH THE STRAIN IN THE SILICON LAYER IS MAINTAINED BY THE SOI STRUCTURE. @ @ FIGURE 1

    Strain release in PFET regions
    5.
    发明专利

    公开(公告)号:GB2550740A

    公开(公告)日:2017-11-29

    申请号:GB201712260

    申请日:2016-01-04

    Applicant: IBM

    Abstract: A method for fabricating a semiconductor device, includes providing a strained silicon on insulator (SSOI) structure, the SSOI structure comprises, a dielectric layer(20) disposed on a substrate(10), a silicon germanium layer(30) disposed on the dielectric layer(20), and a strained semiconductor material layer(40) disposed directly on the silicon germanium layer(30), forming a plurality of fins(43, 45) on the SSOI structure, forming a gate structure(50) over a portion of at least one fin in a nFET region, forming a gate structure(60) over a portion of at least one fin in a pFET region, removing the gate structure(60) over the portion of the at least one fin in the pFET region, removing the silicon germanium layer(30) exposed by the removing, and forming a new gate structure(90) over the portion of the at least one fin in the pFET region, such that the new gate structure(90) surrounds the portion on all four sides.

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