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    • 5. 发明授权
    • Method of forming a fully-depleted SOI ( silicon-on-insulator) MOSFET having a thinned channel region
    • 形成具有稀疏沟道区的完全耗尽的SOI(绝缘体上硅)MOSFET的方法
    • US06660598B2
    • 2003-12-09
    • US10084550
    • 2002-02-26
    • Hussein I. HanafiDiane C. BoydKevin K. ChanWesley NatzleLeathen Shi
    • Hussein I. HanafiDiane C. BoydKevin K. ChanWesley NatzleLeathen Shi
    • H01L21336
    • H01L29/78696H01L29/66545H01L29/66772H01L29/78612
    • A sub-0.05 &mgr;m channel length fully-depleted SOI MOSFET device having low source and drain resistance and minimal overlap capacitance and a method of fabricating the same are provided. In accordance with the method of the present invention, at least one dummy gate region is first formed atop an SOI layer. The dummy gate region includes at least a sacrificial polysilicon region and first nitride spacers located on sidewalls of the sacrificial polysilicon region. Next, an oxide layer that is coplanar with an upper surface of the dummy gate region is formed and then the sacrificial polysilicon region is removed to expose a portion of the SOI layer. A thinned device channel region is formed in the exposed portion of the SOI layer and thereafter inner nitride spacers are formed on exposed walls of the fist nitride spacers. Next, a gate region is formed over the thinned device channel region and then the oxide layer is removed so as to expose thicker portions of the SOI layer than de device channel region.
    • 提供了具有低源极和漏极电阻以及最小重叠电容的0.05微米通道长度的全耗尽SOI MOSFET器件及其制造方法。 根据本发明的方法,首先在SOI层顶部形成至少一个虚拟栅极区域。 虚拟栅极区域至少包括牺牲多晶硅区域和位于牺牲多晶硅区域的侧壁上的第一氮化物间隔物。 接下来,形成与伪栅极区的上表面共面的氧化物层,然后除去牺牲多晶硅区域,以露出SOI层的一部分。 在SOI层的暴露部分中形成一个变薄的器件沟道区,此后在第一氮化物间隔物的暴露的壁上形成内部氮化物间隔物。 接下来,在减薄的器件沟道区上形成栅极区,然后除去氧化物层,以便暴露出SOI层的比较器件沟道区更厚的部分。
    • 8. 发明授权
    • High performance CMOS device structure with mid-gap metal gate
    • 高性能CMOS器件结构,具有中间间隙金属栅极
    • US06762469B2
    • 2004-07-13
    • US10127196
    • 2002-04-19
    • Anda C. MocutaMeikei IeongRicky S. AmosDiane C. BoydDan M. MocutaHuajie Chen
    • Anda C. MocutaMeikei IeongRicky S. AmosDiane C. BoydDan M. MocutaHuajie Chen
    • H01L2976
    • H01L21/823807H01L21/823828
    • High performance (surface channel) CMOS devices with a mid-gap work function metal gate are disclosed wherein an epitaxial layer is used for a threshold voltage Vt adjust/decrease for the PFET area, for large Vt reductions (˜500 mV), as are required by CMOS devices with a mid-gap metal gate. The present invention provides counter doping using an in situ B doped epitaxial layer or a B and C co-doped epitaxial layer, wherein the C co-doping provides an additional degree of freedom to reduce the diffusion of B (also during subsequent activation thermal cycles) to maintain a shallow B profile, which is critical to provide a surface channel CMOS device with a mid-gap metal gate while maintaining good short channel effects. The B diffusion profiles are satisfactorily shallow, sharp and have a high B concentration for devices with mid-gap metal gates, to provide and maintain a thin, highly doped B layer under the gate oxide.
    • 公开了具有中间间隙功函数金属栅极的高性能(表面沟道)CMOS器件,其中外延层用于PFET区域的阈值电压Vt调整/减小,用于大的Vt降低(〜500mV),如 需要具有中间间隙金属栅极的CMOS器件。 本发明提供了使用原位B掺杂外延层或B和C共掺杂外延层的反掺杂,其中C共掺杂提供了额外的自由度以减少B的扩散(也在随后的激活热循环期间) )以保持浅的B剖面,这对于提供具有中间间隙金属栅极的表面沟道CMOS器件而言是至关重要的,同时保持良好的短沟道效应。 对于具有中间间隙金属栅极的器件,B扩散曲线令人满意地浅,尖锐且具有高B浓度,以在栅极氧化物下提供并保持薄的高掺杂B层。
    • 9. 发明授权
    • Anisotropic nitride etch process with high selectivity to oxide and photoresist layers in a damascene etch scheme
    • 各向异性氮化物蚀刻工艺,在镶嵌蚀刻方案中对氧化物和光致抗蚀剂层具有高选择性
    • US06461529B1
    • 2002-10-08
    • US09299137
    • 1999-04-26
    • Diane C. BoydStuart M. BurnsHussein I. HanafiWaldemar W. KoconWilliam C. WilleRichard Wise
    • Diane C. BoydStuart M. BurnsHussein I. HanafiWaldemar W. KoconWilliam C. WilleRichard Wise
    • H01L213215
    • H01L29/66583H01L21/31116H01L21/76224H01L21/823481
    • A process and etchant gas composition for anisotropically etching a trench in a silicon nitride layer of a multilayer structure. The etchant gas composition has an etchant gas including a polymerizing agent, a hydrogen source, an oxidant, and a noble gas diluent. The oxidant preferably includes a carbon-containing oxidant component and an oxidant-noble gas component. The fluorocarbon gas is selected from CF4, C2F6, and C3F8; the hydrogen source is selected from CHF3, CH2F2, CH3F, and H2; the oxidant is selected from CO, CO2, and O2; and the noble gas diluent is selected from He, Ar, and Ne. The constituents are added in amounts to achieve an etchant gas having a high nitride selectivity to silicon oxide and photoresist. A power source, such as an RF power source, is applied to the structure to control the directionality of the high density plasma formed by exciting the etchant gas. The power source that controls the directionality of the plasma is decoupled from the power source used to excite the etchant gas. The etchant gas can be used during a nitride etch step in a process for making a metal oxide semiconductor field effect transistor.
    • 一种用于各向异性蚀刻多层结构的氮化硅层中的沟槽的工艺和蚀刻剂气体组合物。 蚀刻剂气体组合物具有包括聚合剂,氢源,氧化剂和惰性气体稀释剂的蚀刻剂气体。 氧化剂优选包括含碳氧化剂组分和氧化剂 - 惰性气体组分。 碳氟化合物气体选自CF4,C2F6和C3F8; 氢源选自CHF 3,CH 2 F 2,CH 3 F和H 2; 氧化剂选自CO,CO 2和O 2; 惰性气体稀释剂选自He,Ar和Ne。 添加成分以达到对氧化硅和光致抗蚀剂具有高氮化物选择性的蚀刻剂气体。 将诸如RF电源的电源施加到结构以控制通过激发蚀刻剂气体形成的高密度等离子体的方向性。 控制等离子体方向性的电源与用于激发蚀刻剂气体的电源脱耦。 在制造金属氧化物半导体场效应晶体管的工艺中的氮化物蚀刻步骤期间可以使用蚀刻剂气体。