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    • 1. 发明授权
    • Vertical internally-connected trench cell (V-ICTC) and formation method for semiconductor memory devices
    • 垂直内部连接的沟槽单元(V-ICTC)和半导体存储器件的形成方法
    • US06566190B2
    • 2003-05-20
    • US09941689
    • 2001-08-30
    • Brian S. LeeJohn Walsh
    • Brian S. LeeJohn Walsh
    • H01L2994
    • H01L27/10864H01L27/10841H01L27/10867H01L27/10876H01L27/1203H01L29/66181
    • A dynamic random access memory (DRAM) device having a vertical transistor and an internally-connected strap (ICS) to connect the transistor to the capacitor. The ICS makes no direct contact with the substrate. The DRAM cell operates at a substantially lower cell capacitance than that required for a conventional buried strap trench (BEST) cell without causing any negative impact on device performance. The lower cell capacitance also extends the feasibility of deep trench capacitor manufacturing technology without requiring new materials or processing methods. A method of manufacturing the DRAM includes forming a very thin Si layer on top of a DT cell while at the same time the method forms an isolated layer replacing a conventional collar. The formation of the SOI by internal thermal oxidation (ITO) makes the structure in such a manner that the device may be fully depleted.
    • 具有垂直晶体管和内部连接的带(ICS)的动态随机存取存储器(DRAM)器件,用于将晶体管连接到电容器。 ICS不与基板直接接触。 DRAM单元以比常规掩埋带沟槽(BEST)单元所需的电容小得多的单元电容器工作,而不会对器件性能造成任何负面影响。 较低的电池电容也扩大了深沟槽电容器制造技术的可行性,而不需要新的材料或加工方法。 制造DRAM的方法包括在DT单元的顶部上形成非常薄的Si层,同时该方法形成代替传统套环的隔离层。 通过内部热氧化(ITO)形成SOI使得该装置可以完全耗尽。
    • 2. 发明授权
    • Vertical internally-connected trench cell (V-ICTC) and formation method for semiconductor memory devices
    • 垂直内部连接的沟槽单元(V-ICTC)和半导体存储器件的形成方法
    • US06828615B2
    • 2004-12-07
    • US10314131
    • 2002-12-09
    • Brian S. LeeJohn Walsh
    • Brian S. LeeJohn Walsh
    • H01L27108
    • H01L27/10864H01L27/10867H01L27/10876H01L27/1203
    • A dynamic random access memory (DRAM) device having a vertical transistor and an internally-connected strap (ICS) to connect the transistor to the capacitor. The ICS makes no direct contact with the substrate. The DRAM cell operates at a substantially lower cell capacitance than that required for a conventional buried strap trench (BEST) cell without causing any negative impact on device performance. The lower cell capacitance also extends the feasibility of deep trench capacitor manufacturing technology without requiring new materials or processing methods. A method of manufacturing the DRAM includes forming a very thin Si layer on top of a DT cell while at the same time the method forms an isolated layer replacing a conventional collar. The formation of the SOI by internal thermal oxidation (ITO) makes the structure in such a manner that the device may be fully depleted.
    • 具有垂直晶体管和内部连接的带(ICS)的动态随机存取存储器(DRAM)器件,用于将晶体管连接到电容器。 ICS不与基板直接接触。 DRAM单元以比常规掩埋带沟槽(BEST)单元所需的电容小得多的单元电容器工作,而不会对器件性能造成任何负面影响。 较低的电池电容也扩大了深沟槽电容器制造技术的可行性,而不需要新的材料或加工方法。 制造DRAM的方法包括在DT单元的顶部上形成非常薄的Si层,同时该方法形成代替传统套环的隔离层。 通过内部热氧化(ITO)形成SOI使得该装置可以完全耗尽。
    • 10. 发明授权
    • Method of forming a vertically oriented device in an integrated circuit
    • 在集成电路中形成垂直取向器件的方法
    • US06426253B1
    • 2002-07-30
    • US09576465
    • 2000-05-23
    • Helmut Horst TewsAlexander MichaelisBrian S. LeeUwe SchroederStephan Kudelka
    • Helmut Horst TewsAlexander MichaelisBrian S. LeeUwe SchroederStephan Kudelka
    • H01L218242
    • H01L27/10864H01L21/76237H01L21/823487H01L27/10841H01L27/10867
    • A system and method of forming an electrical connection (142) to the interior of a deep trench (104) in an integrated circuit utilizing a low-angle dopant implantation (114) to create a self-aligned mask over the trench. The electrical connection preferably connects the interior plate (110) of a trench capacitor to a terminal of a vertical trench transistor. The low-angle implantation process, in combination with a low-aspect ratio mask structure, generally enables the doping of only a portion of a material overlying or in the trench. The material may then be subjected to a process step, such as oxidation, with selectivity between the doped and undoped regions. Another process step, such as an etch process, may then be used to remove a portion of the material (120) overlying or in the trench, leaving a self-aligned mask (122) covering a portion of the trench, and the remainder of the trench exposed for further processing. Alternatively, an etch process alone, with selectivity between the doped and undoped regions, may be used to create the mask. The self-aligned mask then allows for the removal of selective portions of the materials in the trench so that a vertical trench transistor and a buried strap may be formed on only one side of the trench.
    • 使用低角度掺杂剂注入(114)在集成电路中形成到深沟槽(104)的内部的电连接(142)的系统和方法,以在沟槽上产生自对准掩模。 电连接优选地将沟槽电容器的内板(110)连接到垂直沟槽晶体管的端子。 低角度注入工艺与低纵横比掩模结构相结合,通常能够仅掺杂覆盖或在沟槽中的材料的一部分。 然后可以在掺杂区域和未掺杂区域之间选择性地对材料进行处理步骤,例如氧化。 然后可以使用诸如蚀刻工艺的另一工艺步骤来去除覆盖在沟槽中或在沟槽中的部分材料(120),留下覆盖沟槽的一部分的自对准掩模(122),并且其余部分 沟槽暴露进一步加工。 或者,可以使用仅在掺杂区域和未掺杂区域之间具有选择性的蚀刻工艺来产生掩模。 自对准掩模然后允许去除沟槽中的材料的选择性部分,使得可以仅在沟槽的一侧上形成垂直沟槽晶体管和掩埋带。