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    • 3. 发明授权
    • Process for making six-transistor SRAM cell local interconnect structure
    • 制造六晶体管SRAM单元局部互连结构的工艺
    • US6100128A
    • 2000-08-08
    • US129254
    • 1998-08-04
    • Pailu WangChuen-Der LienKyle W. Terrill
    • Pailu WangChuen-Der LienKyle W. Terrill
    • G11C11/412H01L27/11H01L21/8238
    • G11C11/412H01L27/1104Y10S257/903
    • A patterned planarized insulating layer and a patterned metal layer form all local interconnects required within six-transistor SRAM cells. Supply voltage and ground lines are formed in the metal layer or in a separate layer to maximize available wiring area. Local interconnect size is maximized to increase node capacitance within the cells and reduce soft error rates, and supply voltage and ground wiring area is maximized for added cell stability and static noise margin improvement. Openings in the insulating layer for contacts, including local interconnects, bit lines, supply voltage and ground contacts, are formed with a single mask and self-aligned contact etch. Line size and spacing for the patterned metal layer is minimized because surface contours do not disturb masking and etching and all openings are formed using a single mask. The metal layer can be made thin so that the layers overlying the interconnect layer are nearly flat and so bonding pads in the metal layer are eliminated. In one embodiment, the metal layer that includes a glue layer and a plug layer and is etched to remove the plug layer from above the surface of the insulating layer. This leaves the glue layer for forming the local interconnects.
    • 图形化的平坦化绝缘层和图案化金属层形成六晶体管SRAM单元内所需的所有局部互连。 在金属层或单独的层中形成电源电压和接地线以最大化可用的布线面积。 局部互连尺寸最大化以增加单元内的节点电容并降低软错误率,并且为增加的单元稳定性和静态噪声容限提高,电源电压和接地布线面积最大化。 用于接触的绝缘层中的开口,包括局部互连,位线,电源电压和接地触点,用单个掩模和自对准接触蚀刻形成。 图案化金属层的线尺寸和间距最小化,因为表面轮廓不会妨碍掩模和蚀刻,并且使用单个掩模形成所有开口。 可以使金属层变薄,使得覆盖在互连层上的层几乎是平坦的,因此消除了金属层中的接合焊盘。 在一个实施例中,包括胶层和插塞层的金属层被蚀刻以从绝缘层的表面上方移除插塞层。 这留下用于形成局部互连的胶层。
    • 7. 发明授权
    • Local interconnect structure and process for six-transistor SRAM cell
    • 用于六晶体管SRAM单元的局部互连结构和工艺
    • US5831899A
    • 1998-11-03
    • US841985
    • 1997-04-07
    • Pailu WangChuen-Der LienKyle W. Terrill
    • Pailu WangChuen-Der LienKyle W. Terrill
    • G11C11/412H01L27/11G11C11/00
    • G11C11/412H01L27/1104Y10S257/903
    • A patterned planarized insulating layer and a patterned metal layer form all local interconnects required within six-transistor SRAM cells. Supply voltage and ground lines are formed in the metal layer or in a separate layer to maximize available wiring area. Local interconnect size is maximized to increase node capacitance within the cells and reduce soft error rates, and supply voltage and ground wiring area is maximized for added cell stability and static noise margin improvement. Openings in the insulating layer for contacts, including local interconnects, bit lines, supply voltage and ground contacts, are formed with a single mask and self-aligned contact etch. Line size and spacing for the patterned metal layer is minimized because surface contours do not disturb masking and etching and all openings are formed using a single mask. The metal layer can be made thin so that the layers overlying the interconnect layer are nearly flat and so that bonding pads in the metal layer are eliminated. In one embodiment, the metal layer includes a glue layer and a plug layer and is etched to remove the plug layer from above the surface of the insulating layer. This leaves the glue layer for forming the local interconnects.
    • 图形化的平坦化绝缘层和图案化金属层形成六晶体管SRAM单元内所需的所有局部互连。 在金属层或单独的层中形成电源电压和接地线以最大化可用的布线面积。 局部互连尺寸最大化以增加单元内的节点电容并降低软错误率,并且为增加的单元稳定性和静态噪声容限提高,电源电压和接地布线面积最大化。 用于接触的绝缘层中的开口,包括局部互连,位线,电源电压和接地触点,用单个掩模和自对准接触蚀刻形成。 图案化金属层的线尺寸和间距最小化,因为表面轮廓不会妨碍掩模和蚀刻,并且使用单个掩模形成所有开口。 可以使金属层变薄,使得覆盖在互连层上的层几乎是平的,并且消除金属层中的接合焊盘。 在一个实施例中,金属层包括胶层和塞层,并被蚀刻以从绝缘层的表面上方移除塞子层。 这留下用于形成局部互连的胶层。
    • 9. 发明授权
    • Method of manufacturing a BiCMOS integrated circuit fully integrated
within a CMOS process flow
    • 制造完全集成在CMOS工艺流程中的BiCMOS集成电路的方法
    • US5888861A
    • 1999-03-30
    • US870474
    • 1997-06-06
    • Chung-Jen ChienJeong Y. ChoiChuen-Der Lien
    • Chung-Jen ChienJeong Y. ChoiChuen-Der Lien
    • H01L21/8249H01L21/8238
    • H01L21/8249
    • A process for manufacturing a BiCMOS integrated circuit is implemented by adapting the masking and doping steps used in forming CMOS devices. Thus simultaneous formation of both CMOS and bipolar device structures eliminates the need for any additional masking or process steps to form bipolar device structures. Collector regions 20 of NPN transistors are formed simultaneously with N-wells 18. Collector regions of PNP transistors, if required, are formed simultaneously with P-wells 16. Base regions 24 of the bipolar transistors are formed using threshold voltage implant steps and/or lightly doped drain implant steps of PMOS transistors. Emitter regions 59 are formed, when using a single polysilicon CMOS process, simultaneously with the CMOS gates 72, 74. When employing a double polysilicon CMOS process, the emitter regions 59 are formed concurrently with the second polysilicon layer interconnect structure and/or source/drain regions 50,52 of NMOS transistors. For single polysilicon CMOS process, the buried layer regions 66 are formed during buried contact formation.
    • BiCMOS集成电路的制造工艺通过适应用于形成CMOS器件的掩模和掺杂步骤来实现。 因此同时形成CMOS和双极器件结构消除了对形成双极器件结构的任何附加掩模或工艺步骤的需要。 NPN晶体管的集电极区域20与N阱18同时形成。如果需要,PNP晶体管的集电极区域与P阱16同时形成。双极晶体管的基极区域24使用阈值电压注入步骤和/或 PMOS晶体管的轻掺杂漏极注入步骤。 当使用单个多晶硅CMOS工艺时,发射极区59与CMOS栅极72,74同时形成。当采用双重多晶硅CMOS工艺时,发射极区59与第二多晶硅层互连结构和/或源/ NMOS晶体管的漏极区域50,52。 对于单多晶硅CMOS工艺,在掩埋接触形成期间形成掩埋层区域66。