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    • 5. 发明授权
    • Patterned SOI by formation and annihilation of buried oxide regions during processing
    • 在加工期间通过掩埋氧化物区域的形成和湮灭的图案化SOI
    • US06593205B1
    • 2003-07-15
    • US10080804
    • 2002-02-21
    • Tze-chiang ChenDevendra K. Sadana
    • Tze-chiang ChenDevendra K. Sadana
    • H01L2176
    • H01L21/76243
    • A method of fabricating a silicon-on-insulator (SOI) substrate including at least one patterned buried oxide region having well defined edges is provided. The method includes a step of implanting first ions into a surface of a Si-containing substrate so as to form an implant region of the first ions in the Si-containing substrate. Following the first implant step, a selective implant process is employed wherein second ions that are insoluble in SiO2 are incorporated into portions of the Si-containing substrate. The second ions employed in the selective implant step are capable of preventing the implant region of first ions from forming an oxide region during a subsequent annealing step. An annealing step is then performed which causes formation of a buried oxide region in the implant region of first ions that does not include the second ions.
    • 提供了一种制造绝缘体上硅(SOI)衬底的方法,其包括至少一个具有良好限定边缘的图案化掩埋氧化物区域。 该方法包括将第一离子注入含Si衬底的表面以便在含Si衬底中形成第一离子的注入区的步骤。 在第一注入步骤之后,使用选择性注入工艺,其中不溶于SiO 2的第二离子被并入含Si衬底的部分中。 在选择性注入步骤中使用的第二离子能够在随后的退火步骤期间防止第一离子的注入区域形成氧化物区域。 然后执行退火步骤,其导致在不包括第二离子的第一离子的注入区域中形成掩埋氧化物区域。
    • 6. 发明授权
    • Patterned SOI by formation and annihilation of buried oxide regions during processing
    • 在加工期间通过掩埋氧化物区域的形成和湮灭的图案化SOI
    • US06812114B2
    • 2004-11-02
    • US10119931
    • 2002-04-10
    • Tze-chiang ChenDevendra K. Sadana
    • Tze-chiang ChenDevendra K. Sadana
    • H01L2176
    • H01L21/76243
    • A method of fabricating a silicon-on-insulator (SOI) substrate including an ultra-thin top Si-containing layer and at least one patterned buried semi-insulating or insulating region having well defined edges is provided. The method includes a step of implanting first ions into a surface of a Si-containing substrate so as to form a first implant region of the first ions in the Si-containing substrate. Following the implantation of first ions, a first annealing step is performed which forms a buried semi-insulating or insulating region within the Si-containing substrate. Next, second ions that are insoluble in the semi-insulating or insulating region are selectively implanted into portions of the buried semi-insulating or insulating region. After the selective implant step, a second annealing step is performed which recrystallizes the buried semi-insulating or insulating region that includes second ions to the same crystal structure as the original Si-containing substrate.
    • 提供了一种制造绝缘体上硅(SOI)衬底的方法,其包括超薄顶层含Si层和至少一个具有良好限定边缘的图案化掩埋半绝缘或绝缘区域。 该方法包括将第一离子注入到含Si衬底的表面中以便在含Si衬底中形成第一离子的第一注入区的步骤。 在注入第一离子之后,进行第一退火步骤,其在含Si衬底内形成掩埋的半绝缘或绝缘区域。 接下来,将不溶于半绝缘或绝缘区域的第二离子选择性地注入埋入半绝缘或绝缘区域的部分。 在选择性注入步骤之后,执行第二退火步骤,其将包含第二离子的掩埋半绝缘或绝缘区域再结晶到与原始的含Si衬底相同的晶体结构。
    • 7. 发明授权
    • Silicon-on-insulator vertical array device trench capacitor DRAM
    • 绝缘体上的垂直阵列器件沟槽电容器DRAM
    • US06566177B1
    • 2003-05-20
    • US09427257
    • 1999-10-25
    • Carl J. RadensGary B. BronnerTze-chiang ChenBijan DavariJack A. MandelmanDan MoyDevendra K. SadanaGhavam Ghavami ShahidiScott R. Stiffler
    • Carl J. RadensGary B. BronnerTze-chiang ChenBijan DavariJack A. MandelmanDan MoyDevendra K. SadanaGhavam Ghavami ShahidiScott R. Stiffler
    • H01L2100
    • H01L27/10864H01L27/1087
    • A silicon on insulator (SOI) dynamic random access memory (DRAM) cell and array and method of manufacture. The memory cell includes a trench storage capacitor connected by a self aligned buried strap to a vertical access transistor. A buried oxide layer isolates an SOI layer from a silicon substrate. The trench capacitor is formed in the substrate and the access transistor is formed on a sidewall of the SOI layer. A polysilicon strap connected to the polysilicon plate of the storage capacitor provides a self-aligned contact to the source of the access transistor. Initially, the buried oxide layer is formed in the wafer. Deep trenches are etched, initially just through the SOI layer and the BOX layer. Protective sidewalls are formed in the trenches. Then, the deep trenches are etched into the substrate. The volume in the substrate is expanded to form a bottle shaped trench. A polysilicon capacitor plate is formed in the deep trenches and conductive polysilicon straps are formed in the trenches between the capacitor plates and the SOI sidewalls. Device regions are defined in the wafer and a sidewall gate is formed in the deep trenches. Shallow trenches isolation (STI) is used to isolate and define cells. Bitlines and wordlines are formed on the wafer.
    • 一种绝缘体上硅(SOI)动态随机存取存储器(DRAM)单元及阵列及其制造方法。 存储单元包括通过自对准埋入带连接到垂直存取晶体管的沟槽存储电容器。 掩埋氧化层将SOI层与硅衬底隔离。 沟槽电容器形成在衬底中,并且存取晶体管形成在SOI层的侧壁上。 连接到存储电容器的多晶硅板的多晶硅带提供与存取晶体管的源极的自对准接触。 最初,在晶圆中形成掩埋氧化物层。 深沟槽被蚀刻,最初刚刚通过SOI层和BOX层。 在沟槽中形成保护侧壁。 然后,将深沟槽蚀刻到衬底中。 衬底中的体积被扩大以形成瓶形沟槽。 在深沟槽中形成多晶硅电容器板,并且在电容器板和SOI侧壁之间的沟槽中形成导电多晶硅带。 在晶片中限定器件区域,并且在深沟槽中形成侧壁栅极。 浅沟槽隔离(STI)用于隔离和定义细胞。 在晶片上形成位线和字线。