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    • 3. 发明授权
    • DRAM memory cell having a horizontal SOI transfer device disposed over a
buried storage node and fabrication methods therefor
    • DRAM存储单元具有设置在掩埋存储节点上的水平SOI转移装置及其制造方法
    • US5055898A
    • 1991-10-08
    • US693880
    • 1991-04-30
    • Kenneth E. Beilstein, Jr.Claude L. BertinJohn R. PessettoFrancis R. White
    • Kenneth E. Beilstein, Jr.Claude L. BertinJohn R. PessettoFrancis R. White
    • H01L27/04H01L21/822H01L21/8242H01L27/08H01L27/10H01L27/108H01L29/786
    • H01L27/10844H01L27/10832H01L29/78603H01L29/78654
    • A semiconductor memory cell, and methods of fabricating same, that includes a substrate (10) and a plurality of trench capacitors (12) formed at least partially within the substrate and dielectrically isolated therefrom. A silicon-on-insulator (SOI) region includes a silicon layer (16) that overlies an insulator (14). The silicon layer is differentiated into a plurality of active device regions, each of which is disposed above one of the electrically conductive regions. Each of the active device regions is coupled to an overlying first electrode, or wordline (20), for forming a gate node of an access transistor (1), to a second electrode, or bitline (32), for forming a source node of the access transistor, and to the underlying trench capacitor for forming a drain node of the access transistor. The wordline includes a pair of opposed, electrically insulating vertical sidewalls, and the source node and the drain node of each of the access transistors are each comprised of an electrical conductor disposed upon one of the vertical sidewalls. The array of memory cells further includes structure (11, 13) for coupling the active device regions to the substrate to reduce or eliminate a floating substrate effect.
    • 一种半导体存储单元及其制造方法,其包括基板(10)和至少部分地形成在基板内并与之介电隔离的多个沟槽电容器(12)。 绝缘体上硅(SOI)区域包括覆盖绝缘体(14)的硅层(16)。 硅层被区分成多个有源器件区域,每个有源器件区域设置在一个导电区域之上。 每个有源器件区域耦合到上覆的第一电极或用于形成存取晶体管(1)的栅极节点的字线(20),到第二电极或位线(32),用于形成源节点 存取晶体管,以及用于形成存取晶体管的漏极节点的底层沟槽电容器。 字线包括一对相对的,电绝缘的垂直侧壁,并且每个存取晶体管的源极节点和漏极节点各自包括设置在垂直侧壁中的一个上的电导体。 存储单元阵列还包括用于将有源器件区域耦合到衬底的结构(11,13),以减少或消除浮置衬底效应。
    • 7. 发明授权
    • Process for making polycide structures
    • 制造多晶硅结构的方法
    • US4470189A
    • 1984-09-11
    • US497372
    • 1983-05-23
    • Stanley RobertsFrancis R. White
    • Stanley RobertsFrancis R. White
    • H01L29/78H01L21/027H01L21/28H01L21/3213H01L21/336H01L21/768H01L29/423H01L29/43H01L29/49H01L21/283C23C15/00
    • H01L29/66575H01L21/0272H01L21/28061H01L21/28123H01L21/32134H01L21/32137H01L21/7688H01L21/76889Y10S148/084Y10S438/951
    • An improved method for making polycide structures for use in electrode and wiring interconnection applications. It includes depositing a layer of polysilicon on an insulating layer and forming on this polysilicon layer a silicide structure and a silicon capping layer. The deposited layers are defined and etched through dry etching techniques using a dry etching mask made of a refractory metal that does not form a volatile halide in a dry etching environment. Metals with such characteristics include cobalt (Co), nickel (Ni), iron (Fe), and manganese (Mn). The metal mask and the other deposited layers may be formed and defined using a photoresist mask as a deposition mask formed to be compatible with lift-off techniques.The silicide may be deposited either through a chemical vapor deposition process or through evaporation techniques. If it is formed through the co-evaporation of metal and silicon, then the structure is subjected to a low temperature reaction annealing step at a temperature between 500.degree. and 600.degree. C. prior to dry etching. To avoid a diffusion of the metal mask into the silicon layer, during this low temperature annealing, the process provides for the formation of a diffusion barrier layer between the metal mask and the silicon layer.Following the removal of the metal mask and the diffusion barrier layer, the structure is annealed at a temperature sufficient to cause the homogenization of the silicide layer.
    • 一种用于制造用于电极和布线互连应用的多晶硅结构的改进方法。 它包括在绝缘层上沉积多晶硅层,并在该多晶硅层上形成硅化物结构和硅覆盖层。 通过干法蚀刻技术,使用由干蚀刻环境中不形成挥发性卤化物的难熔金属制成的干蚀刻掩模来定义和蚀刻沉积层。 具有这种特性的金属包括钴(Co),镍(Ni),铁(Fe)和锰(Mn)。 可以使用形成为与剥离技术相容的沉积掩模的光致抗蚀剂掩模来形成和限定金属掩模和其它沉积层。 硅化物可以通过化学气相沉积工艺或通过蒸发技术沉积。 如果通过金属和硅的共蒸发形成,则在干蚀刻之前,在500℃和600℃之间的温度下对该结构进行低温反应退火步骤。 为了避免金属掩模扩散到硅层中,在该低温退火期间,该工艺提供了在金属掩模和硅层之间形成扩散阻挡层。 在除去金属掩模和扩散阻挡层之后,该结构在足以使硅化物层均匀化的温度下退火。
    • 10. 发明申请
    • DEEP TRENCH CAPACITOR FOR SOI CMOS DEVICES FOR SOFT ERROR IMMUNITY
    • 用于软错误免疫的SOI CMOS器件的深度TRENCH电容器
    • US20110177660A1
    • 2011-07-21
    • US13075271
    • 2011-03-30
    • John E. Barth, JR.Kerry BernsteinEthan H. CannonFrancis R. White
    • John E. Barth, JR.Kerry BernsteinEthan H. CannonFrancis R. White
    • H01L21/8242
    • H01L27/1203H01L21/84H01L27/0629H01L27/10861H01L29/66181
    • A semiconductor structure is disclosed. The semiconductor structure includes an active semiconductor layer, a semiconductor device having a gate disposed on top of the active semiconductor layer, and source and drain regions and a body/channel region disposed within the active semiconductor layer, an insulator layer having a first and second side, the first side being adjacent to the active semiconductor layer, a substrate disposed adjacent to the second side of the insulator layer, a deep trench capacitor disposed under the body/channel region of the semiconductor device. The deep trench capacitor electrically connects with and contacts the body/channel region of the semiconductor device, and is located adjacent to the gate of the semiconductor device. The semiconductor structure increases a critical charge Qcrit, thereby reducing a soft error rate (SER) of the semiconductor device.
    • 公开了半导体结构。 半导体结构包括有源半导体层,具有设置在有源半导体层顶部的栅极的半导体器件以及设置在有源半导体层内的源极和漏极区域以及主体/沟道区域,具有第一和第二 所述第一侧与所述有源半导体层相邻,与所述绝缘体层的所述第二侧相邻配置的衬底,设置在所述半导体器件的所述主体/沟道区域下方的深沟槽电容器。 深沟槽电容器与半导体器件的主体/沟道区电连接并接触半导体器件的主体/沟道区,并且位于半导体器件的栅极附近。 半导体结构增加了临界电荷Qcrit,从而降低了半导体器件的软错误率(SER)。