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    • 84. 发明申请
    • Recessed Single Crystalline Source and Drain For Semiconductor-On-Insulator Devices
    • 嵌入式半导体绝缘体器件的单晶硅和漏极
    • US20130105898A1
    • 2013-05-02
    • US13285162
    • 2011-10-31
    • Geng WangKangguo ChengJoseph ErvinChengwen PeiRavi M. Todi
    • Geng WangKangguo ChengJoseph ErvinChengwen PeiRavi M. Todi
    • H01L29/78H01L21/336
    • H01L29/66477H01L21/84H01L27/1203
    • After formation of a gate stack, regions in which a source and a drain are to be formed are recessed through the top semiconductor layer and into an upper portion of a buried single crystalline rare earth oxide layer of a semiconductor-on-insulator (SOI) substrate so that a source trench and drain trench are formed. An embedded single crystalline semiconductor portion epitaxially aligned to the buried single crystalline rare earth oxide layer is formed in each of the source trench and the drain trench to form a recessed source and a recessed drain, respectively. Protrusion of the recessed source and recessed drain above the bottom surface of a gate dielectric can be minimized to reduce parasitic capacitive coupling with a gate electrode, while providing low source resistance and drain resistance through the increased thickness of the recessed source and recessed drain relative to the thickness of the top semiconductor layer.
    • 在形成栅极叠层之后,要形成源极和漏极的区域通过顶部半导体层凹陷,并进入绝缘体上半导体(SOI)的掩埋的单晶稀土氧化物层的上部, 衬底,从而形成源极沟槽和漏极沟槽。 在源极沟槽和漏极沟槽的每一个中分别形成外延对齐于埋入的单晶稀土氧化物层的嵌入式单晶半导体部分,以分别形成凹陷源和凹陷漏极。 可以将栅极电介质的底表面之上的凹陷源和凹陷漏极的突起最小化,以减少与栅极电极的寄生电容耦合,同时通过凹陷源和凹陷漏极的增加的厚度提供低的源极电阻和漏极电阻,相对于 顶部半导体层的厚度。
    • 85. 发明授权
    • Structure and method to integrate embedded DRAM with finfet
    • 嵌入式DRAM与finfet的结构和方法
    • US08421139B2
    • 2013-04-16
    • US12755487
    • 2010-04-07
    • Sivananda KanakasabapathyHemanth JagannathanGeng Wang
    • Sivananda KanakasabapathyHemanth JagannathanGeng Wang
    • H01L21/00
    • H01L27/10826H01L21/26586H01L21/845H01L27/10879H01L27/10891H01L27/1211
    • A transistor includes a first fin structure and at least a second fin structure formed on a substrate. A deep trench area is formed between the first and second fin structures. The deep trench area extends through an insulator layer of the substrate and a semiconductor layer of the substrate. A high-k metal gate is formed within the deep trench area. A polysilicon layer is formed within the deep trench area adjacent to the metal layer. The polysilicon layer and the high-k metal layer are recessed below a top surface of the insulator layer. A poly strap in the deep trench area is formed on top of the high-k metal gate and the polysilicon material. The poly strap is dimensioned to be below a top surface of the first and second fin structures. The first fin structure and the second fin structure are electrically coupled to the poly strap.
    • 晶体管包括第一鳍结构和形成在衬底上的至少第二鳍结构。 在第一和第二翅片结构之间形成深沟槽区域。 深沟槽区域延伸穿过衬底的绝缘体层和衬底的半导体层。 在深沟槽区域内形成高k金属栅极。 在与金属层相邻的深沟槽区域内形成多晶硅层。 多晶硅层和高k金属层凹陷在绝缘体层的顶表面下方。 深沟槽区域中的多晶带形成在高k金属栅极和多晶硅材料的顶部上。 该多晶带的尺寸被设计成在第一和第二鳍结构的顶表面下方。 第一翅片结构和第二翅片结构电耦合到多晶带。
    • 86. 发明申请
    • EPITAXIAL EXTENSION CMOS TRANSISTOR
    • 外延扩展CMOS晶体管
    • US20130032859A1
    • 2013-02-07
    • US13198152
    • 2011-08-04
    • Chengwen PeiGeng WangYanli Zhang
    • Chengwen PeiGeng WangYanli Zhang
    • H01L29/78H01L21/336
    • H01L29/6656H01L29/517H01L29/6653H01L29/66545H01L29/66628H01L29/66636
    • A pair of horizontal-step-including trenches are formed in a semiconductor layer by forming a pair of first trenches having a first depth around a gate structure on the semiconductor layer, forming a disposable spacer around the gate structure to cover proximal portions of the first trenches, and by forming a pair of second trenches to a second depth greater than the first depth. The disposable spacer is removed, and selective epitaxy is performed to form an integrated epitaxial source and source extension region and an integrated epitaxial drain and drain extension region. A replacement gate structure can be formed after deposition and planarization of a planarization dielectric layer and subsequent removal of the gate structure and laterally expand the gate cavity over expitaxial source and drain extension regions. Alternately, a contact-level dielectric layer can be deposited directly on the integrated epitaxial regions and contact via structures can be formed therein.
    • 通过在半导体层上形成围绕栅极结构的第一深度的一对第一沟槽,在半导体层中形成一对水平台阶包含的沟槽,在栅极结构周围形成一次性间隔物,以覆盖第一 并且通过形成大于第一深度的第二深度的一对第二沟槽。 去除一次性间隔物,并进行选择性外延以形成集成的外延源和源极延伸区域以及集成的外延漏极和漏极延伸区域。 可以在平坦化介电层的沉积和平坦化之后形成替代栅极结构,并且随后去除栅极结构并且在外延源极和漏极延伸区域上横向扩展栅极腔。 或者,可以将接触电介质层直接沉积在集成的外延区上,并且可以在其中形成接触通孔结构。
    • 87. 发明申请
    • SUPPRESSION OF DIFFUSION IN EPITAXIAL BURIED PLATE FOR DEEP TRENCHES
    • 抑制深海IN IN。ED。。。。。。。。。。。。。。。
    • US20120286392A1
    • 2012-11-15
    • US13106349
    • 2011-05-12
    • Chengwen PeiGeng Wang
    • Chengwen PeiGeng Wang
    • H01L29/02H01L21/02
    • H01L29/66181H01L21/2652H01L27/10829H01L27/10861H01L27/10897H01L29/945
    • Dopants of a first conductivity type are implanted into a top portion of a semiconductor substrate having a doping of the first conductivity type to increase the dopant concentration in the top portion, which is a first-conductivity-type semiconductor layer. A semiconductor material layer having a doping of the second conductivity type, a buried insulator layer, and a top semiconductor layer are formed thereupon. Deep trenches having a narrow width have a bottom surface within the second-conductivity-type semiconductor layer, which functions as a buried plate. Deep trenches having a wider width are etched into the first-conductivity-type layer underneath, and can be used to form an isolation structure. The additional dopants in the first-conductivity-type semiconductor layer provide a counterdoping against downward diffusion of dopants of the second conductivity type to enhance electrical isolation.
    • 将第一导电类型的掺杂剂注入到具有第一导电类型的掺杂的半导体衬底的顶部中,以增加作为第一导电型半导体层的顶部中的掺杂剂浓度。 在其上形成具有第二导电类型的掺杂的半导体材料层,掩埋绝缘体层和顶部半导体层。 具有窄宽度的深沟槽具有在第二导电型半导体层内的底表面,其用作掩埋板。 具有较宽宽度的深沟槽被蚀刻到下面的第一导电类型层中,并且可用于形成隔离结构。 第一导电型半导体层中的附加掺杂剂提供反向掺杂以抵抗第二导电类型的掺杂剂的向下扩散以增强电隔离。
    • 88. 发明授权
    • Structure and method to fabricate pFETS with superior GIDL by localizing workfunction
    • 通过定位功能来制造具有优异GIDL的pFETS的结构和方法
    • US08299530B2
    • 2012-10-30
    • US12717375
    • 2010-03-04
    • Chengwen PeiRoger A. Booth, Jr.Kangguo ChengJoseph ErvinRavi M. TodiGeng Wang
    • Chengwen PeiRoger A. Booth, Jr.Kangguo ChengJoseph ErvinRavi M. TodiGeng Wang
    • H01L27/12H01L21/8238
    • H01L21/22H01L21/8238H01L27/092
    • A semiconductor structure and a method of forming the same are provided in which the gate induced drain leakage is controlled by introducing a workfunction tuning species within selected portions of a pFET such that the gate/SD (source/drain) overlap area of the pFET is tailored towards flatband, yet not affecting the workfunction at the device channel region. The structure includes a semiconductor substrate having at least one patterned gate stack located within a pFET device region of the semiconductor substrate. The structure further includes extension regions located within the semiconductor substrate at a footprint of the at least one patterned gate stack. A channel region is also present and is located within the semiconductor substrate beneath the at least one patterned gate stack. The structure further includes a localized workfunction tuning area located within a portion of at least one of the extension regions that is positioned adjacent the channel region as well as within at least a sidewall portion of the at least one gate stack. The localized workfunction tuning area can be formed by ion implantation or annealing.
    • 提供了一种半导体结构及其形成方法,其中通过在pFET的选定部分内引入功函数调谐物质来控制栅极感应漏极泄漏,使得pFET的栅极/ SD(源极/漏极)重叠区域为 适应平带,但不影响设备通道区域的功能。 该结构包括具有位于半导体衬底的pFET器件区域内的至少一个图案化栅叠层的半导体衬底。 所述结构还包括位于所述半导体衬底内的所述至少一个图案化栅叠层的覆盖区的扩展区。 沟道区域也存在并且位于至少一个图案化栅叠层下方的半导体衬底内。 该结构进一步包括位于至少一个延伸区域的一部分内的局部功能调谐区域,其位于邻近通道区域以及至少一个栅极叠层的至少一个侧壁部分内。 通过离子注入或退火可形成局部功能调谐区域。