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    • 1. 发明授权
    • Method to define poly dog-bone for word line strapping contact at stitch area in embedded DRAM process
    • 在嵌入式DRAM工艺中,针脚区域的字线绑扎接触定义多边形骨的方法
    • US06376294B1
    • 2002-04-23
    • US09755686
    • 2001-01-08
    • Kuo-Chyuan TzengWen-Chuan ChiangWen-Cheng ChenChen-Jong Wang
    • Kuo-Chyuan TzengWen-Chuan ChiangWen-Cheng ChenChen-Jong Wang
    • H01L218238
    • H01L27/10891H01L21/823842H01L27/10894
    • A method for fabricating a dog-bone in a DRAM device, comprising the following steps. A semiconductor structure having an upper silicon layer with STIs formed therein is provided. The semiconductor structure has a LOGIC region and a DRAM region with a stitch region therebetween. A polysilicon layer is formed over the semiconductor structure. A dopant is selectively implanted in the polysilicon region within the DRAM region, and the portion of the stitch region within the DRAM region, to form a doped poly segment, and an undoped poly segment within the LOGIC region, and the portion of the stitch region within the LOGIC region. A hard mask is formed over the doped poly segment and the undoped poly segment and patterned to form at least one patterned first hard mask portion only over the word line doped poly segment within the DRAM region. At least one second mask layer portion is formed over the undoped poly segment within the LOGIC region and at least one third mask layer portion is formed over the doped poly segment in the portion of the stitch region within the DRAM region. The doped poly segment and undoped poly segment are etched to form: undoped poly periphery logic gate portions within the LOGIC region; doped poly dog-bone within the portion of the stitch region within the DRAM region; and doped poly word lines within the DRAM region. The second and third mask layer portions are stripped to expose the undoped poly periphery logic gate portions and the doped poly dog-bone.
    • 一种用于在DRAM器件中制造狗骨的方法,包括以下步骤。 提供了具有形成有STI的上硅层的半导体结构。 半导体结构具有LOGIC区域和其间具有缝合区域的DRAM区域。 在半导体结构上形成多晶硅层。 掺杂剂选择性地注入到DRAM区域内的多晶硅区域中,并且DRAM区域内的线圈区域的部分,以形成掺杂的多段,以及逻辑区域内的未掺杂的多段,以及缝合区域的部分 在LOGIC区域内。 在掺杂的多段和未掺杂的多段上形成硬掩模,并且被图案化以仅在DRAM区域内的字线掺杂的多段上形成至少一个图案化的第一硬掩模部分。 至少一个第二掩模层部分形成在LOGIC区域内的未掺杂的多段上,并且至少一个第三掩模层部分形成在DRAM区域内的线迹区域的部分中的掺杂多晶片段上。 蚀刻掺杂的多段和未掺杂的多段以在逻辑区内形成未掺杂的多边形逻辑门部; 在DRAM区域内的线圈区域的部分内的掺杂多晶骨; 和在DRAM区域内的掺杂多晶字线。 剥离第二和第三掩模层部分以暴露未掺杂的多边形逻辑门部分和掺杂的多晶骨。
    • 2. 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。
    • 5. 发明授权
    • Method of defining a buried stack capacitor structure for a one transistor RAM cell
    • 定义一个晶体管RAM单元的掩埋堆叠电容器结构的方法
    • US06420226B1
    • 2002-07-16
    • US10020753
    • 2001-12-12
    • Wen-Cheng ChenKuo-Ching HuangChen-Jong WangWen-Chuan Chiang
    • Wen-Cheng ChenKuo-Ching HuangChen-Jong WangWen-Chuan Chiang
    • H01L218244
    • H01L27/105H01L27/11H01L28/91H01L29/66181
    • A process for fabricating a buried stack capacitor structure, to be used in a one transistor, RAM cell, has been developed. The process features formation of a self-aligned, ring shaped storage node opening, formed in a top portion of an silicon oxide filled, shallow trench shape, via a selective dry etch procedure. The selective dry etch procedure in combination with subsequent selective wet etch procedures, create bare portions of semiconductor substrate at the junction of the ring shaped storage node opening and the adjacent top surface of semiconductor, allowing a heavily doped region to be created in this region. The presence of the heavily doped region reduces the node to substrate resistance encountered when a storage node structure is formed in the ring shaped storage node structure, as well as on the overlying the heavily doped region.
    • 已经开发了用于单晶体管,RAM单元中的埋层叠层电容器结构的制造工艺。 该方法特征在于通过选择性干法蚀刻工艺形成形成在氧化硅填充的浅沟槽形状的顶部的自对准的环形存储节点开口。 选择性干蚀刻方法与随后的选择性湿法蚀刻程序结合,在环形存储节点开口和相邻的半导体顶表面的接合处产生半导体衬底的裸露部分,允许在该区域中产生重掺杂区域。 当在环形存储节点结构中形成存储节点结构时,以及在重掺杂区域上覆盖时,重掺杂区域的存在将节点与衬底电阻降低。
    • 10. 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。