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    • 4. 发明授权
    • Method of forming a composite spacer to eliminate polysilicon stringers between elements in a pseudo SRAM cell
    • 形成复合间隔物以消除伪SRAM单元中的元件之间的多晶硅桁条的方法
    • US06638813B1
    • 2003-10-28
    • US10059825
    • 2002-01-29
    • Kuo-Chyuan TzengChen-Jong WangChung-Wei ChangWen-Chuan ChiangWen-Cheng ChenKuo-Ching Huang
    • Kuo-Chyuan TzengChen-Jong WangChung-Wei ChangWen-Chuan ChiangWen-Cheng ChenKuo-Ching Huang
    • H01L218242
    • H01L28/60H01L21/31111H01L21/31116H01L21/32137H01L21/76232H01L27/11
    • A process for forming a composite insulator spacer on the sides of a buried stack capacitor structure, wherein the buried stack capacitor structure is located overlying a portion of an insulator filled, shallow trench isolation (STI) region, has been developed. A thin silicon nitride spacer is first formed on the sides of the completed buried stack capacitor structure, followed by deposition of a silicon oxide layer. An anisotropic dry etch procedure is next employed removing a top portion of the silicon oxide layer, and resulting in a partially defined silicon oxide spacer. A critical wet etch procedure is next used to remove the bottom portion of the silicon oxide layer, defining the final silicon oxide spacer of the composite insulator spacer, now comprised of a silicon oxide spacer on an underlying silicon nitride spacer. The wet etch procedure allows a gradual slope to be created at the composite insulator spacer—STI region interface, reducing the risk of leaving, or forming polysilicon residuals or stringers on the underlying surface, which can occur during definition of a MOSFET gate structure. The elimination of the polysilicon stringers reduces the risk of leakage between SRAM cell elements, such as buried stack capacitor structures, and MOSFET devices.
    • 已经开发了一种用于在掩埋叠层电容器结构的侧面上形成复合绝缘体间隔物的方法,其中埋层叠层电容器结构位于绝缘体填充的浅沟槽隔离(STI)区域的一部分上方。 首先在完成的掩埋堆叠电容器结构的侧面上形成薄的氮化硅间隔物,然后沉积氧化硅层。 接下来,使用各向异性干蚀刻工艺去除氧化硅层的顶部,并产生部分限定的氧化硅间隔物。 接下来使用关键的湿法蚀刻工艺来去除氧化硅层的底部,限定复合绝缘垫片的最终氧化硅隔离物,现在由下面的氮化硅间隔物上的氧化硅间隔物构成。 湿蚀刻工艺允许在复合绝缘体间隔件-ST区域界面处产生逐渐的斜率,从而降低在MOSFET栅极结构的定义期间可能发生的在下表面上的离开风险或形成多晶硅残余物或桁条。 多晶硅桁架的消除降低了诸如掩埋堆叠电容器结构的SRAM单元元件和MOSFET器件之间的泄漏的风险。
    • 7. 发明申请
    • Metal-Insulator-Metal Capacitor and Method of Fabricating
    • 金属绝缘体 - 金属电容器和制造方法
    • US20130043560A1
    • 2013-02-21
    • US13212922
    • 2011-08-18
    • Kuo-Chyuan TzengLuan C. TranChen-Jong WangKuo-Chi TuHsiang-Fan Lee
    • Kuo-Chyuan TzengLuan C. TranChen-Jong WangKuo-Chi TuHsiang-Fan Lee
    • H01L27/06H01L21/02
    • H01L28/86H01L23/5223H01L28/40H01L28/90H01L2924/0002H01L2924/00
    • Embodiments of MIM capacitors may be embedded into a thick IMD layer with enough thickness (e.g., 10 KŘ30 KÅ) to get high capacitance, which may be on top of a thinner IMD layer. MIM capacitors may be formed among three adjacent metal layers which have two thick IMD layers separating the three adjacent metal layers. Materials such as TaN or TiN are used as bottom/top electrodes & Cu barrier. The metal layer above the thick IMD layer may act as the top electrode connection. The metal layer under the thick IMD layer may act as the bottom electrode connection. The capacitor may be of different shapes such as cylindrical shape, or a concave shape. Many kinds of materials (Si3N4, ZrO2, HfO2, BST . . . etc) can be used as the dielectric material. The MIM capacitors are formed by one or two extra masks while forming other non-capacitor logic of the circuit.
    • MIM电容器的实施例可以嵌入到具有足够厚度(例如,10K〜30K)的厚IMD层中以获得高电容,其可以在更薄的IMD层之上。 可以在三个相邻的金属层之间形成MIM电容器,这两个相邻的金属层具有两个分开三个相邻金属层的厚的IMD层。 诸如TaN或TiN的材料用作底部/顶部电极和Cu屏障。 厚IMD层上方的金属层可以用作顶部电极连接。 厚IMD层下面的金属层可以用作底部电极连接。 电容器可以是不同的形状,例如圆柱形或凹形。 可以使用多种材料(Si3N4,ZrO2,HfO2,BST等)作为介电材料。 MIM电容器由一个或两个额外的掩模形成,同时形成电路的其他非电容器逻辑。
    • 9. 发明授权
    • Single transistor random access memory (1T-RAM) cell with dual threshold voltages
    • 具有双阈值电压的单晶体管随机存取存储器(1T-RAM)单元
    • US06670664B1
    • 2003-12-30
    • US10279809
    • 2002-10-22
    • Kuo-Chyuan TzengDennis J. SinitskyChen-Jong WangWen-Chaun Chiang
    • Kuo-Chyuan TzengDennis J. SinitskyChen-Jong WangWen-Chaun Chiang
    • H01L27108
    • H01L27/10805H01L27/10873
    • A random access memory cell and a method for fabrication thereof provide a field effect transistor device laterally adjoining a metal oxide semiconductor capacitor device, each formed within an active region of a semiconductor substrate. Within the random access memory cell and method: (1) a single fluorinated silicon oxide layer of a single thickness serves as both a gate dielectric layer within the field effect transistor device and a capacitor dielectric layer within the metal oxide semiconductor capacitor device; and (2) a channel region within the field effect transistor device has a different threshold voltage adjusting dopant concentration in comparison with a semiconductor plate region within the metal oxide semiconductor capacitor device. The random access memory cell is fabricated with enhanced performance.
    • 随机存取存储单元及其制造方法提供横向邻接金属氧化物半导体电容器器件的场效应晶体管器件,每个形成在半导体衬底的有源区内。 在随机存取存储器单元和方法中:(1)单个厚度的单个氟化硅氧化物层用作场效应晶体管器件内的栅极电介质层和金属氧化物半导体电容器器件内的电容器电介质层; 和(2)场效应晶体管器件内的沟道区域与金属氧化物半导体电容器件内的半导体板区域相比具有不同的阈值电压调整掺杂剂浓度。 该随机存取存储器单元以增强的性能制造。