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    • 5. 发明授权
    • Threshold voltage roll-off compensation using back-gated MOSFET devices for system high-performance and low standby power
    • 使用后门控MOSFET器件进行阈值电压滚降补偿,用于系统高性能和低待机功耗
    • US07089515B2
    • 2006-08-08
    • US10796805
    • 2004-03-09
    • Hussein I. HanafiRobert H. DennardWilfried E. Haensch
    • Hussein I. HanafiRobert H. DennardWilfried E. Haensch
    • G06F17/50
    • H03K19/0013
    • A method for compensating the threshold voltage roll-off using transistors containing back-gates or body nodes is provided. The method includes designing a semiconductor system or chip having a plurality of transistors with a channel length of Lnom. For the present invention, it is assumed that the channel length of these transistors at the completion of chip manufacturing is Lmax. This enables one to set the off-current to the maximum value of I-offmax which is done by setting the threshold voltage value to Vtmin. The Vtmin for these transistors is obtained during processing by using the proper implant dose. After manufacturing, the transistors are then tested to determine the off-current thereof. Some transistors within the system or chip will have an off-current value that meets a current specification. For those transistor devices, no further compensation is required. For other transistors within the system or chip, the off-current is not within the predetermined specification. For those transistors, threshold voltage roll-off has occurred since they are transistors that have a channel length that is less than nominal. For such short channel transistors, the threshold voltage is low, even lower than Vtmin, and the off-current is high, even higher than I-offmax. Compensation of the short channel transistors is achieved in the present invention by biasing the back-gate or body node to give increased threshold voltage about equal to Vtmin and hence an off-current that meets the predetermined specification, which is about equal to I-offmax.
    • 提供了使用包含背栅或体节点的晶体管补偿阈值电压滚降的方法。 该方法包括设计具有通道长度为L nom的多个晶体管的半导体系统或芯片。 对于本发明,假设在芯片制造完成时这些晶体管的沟道长度为L max max。 这使得能够将截止电流设置为通过将阈值电压值设置为Vt分钟来完成的I-OFF 的最大值。 通过使用适当的植入剂量,在处理期间获得这些晶体管的Vt 。 在制造之后,然后测试晶体管以确定其截止电流。 系统或芯片内的一些晶体管将具有满足当前规范的截止值。 对于那些晶体管器件,不需要进一步的补偿。 对于系统或芯片内的其他晶体管,截止电流不在预定的规范内。 对于那些晶体管,已经发生阈值电压滚降,因为它们是具有小于额定值的沟道长度的晶体管。 对于这种短沟道晶体管,阈值电压低,甚至低于Vt分钟<! - SIPO - >,并且截止电流高,甚至高于I-off最大值。 在本发明中通过偏置背栅极或体节点以提供大约等于Vt分钟的阈值电压,从而达到满足预定规格的截止电流来实现短沟道晶体管的补偿, 其大约等于I-off最大
    • 7. 发明授权
    • CMOS off-chip driver with reduced signal swing and reduced power supply
disturbance
    • CMOS片外驱动器具有降低的信号摆幅和减少电源干扰
    • US5206544A
    • 1993-04-27
    • US682753
    • 1991-04-08
    • Chih-Liang ChenRobert H. DennardHussein I. Hanafi
    • Chih-Liang ChenRobert H. DennardHussein I. Hanafi
    • H03K17/00H03K17/16H03K17/687H03K19/0175
    • H03K17/163H03K2217/0036
    • An off-chip driver circuit which includes a complementary pair of field effect transistor source followers connected in a non-inverting series circuit arrangement. The driver circuit includes an n-channel device to pull the output up to the positive supply less the threshold drop across the device and a p-channel device to pull the output down for the opposite transition to within a threshold voltage drop above ground of the p-channel device. The driver circuit includes means for eliminating body effect by connecting the n(p)-well of the p(n) channel transistor to the output node. The driver circuit provides a reduced swing low noise output which reduces the collapse of the power supply. The driver circuit provides an appropriate impedance match to the output transmission line, so that the output transmission line can be terminated to eliminate reflections.
    • 片外驱动电路,其包括以非反相串联电路布置连接的互补的一对场效应晶体管源极跟随器。 驱动器电路包括n沟道器件,用于将输出拉至正电源,减去器件上的阈值下降,以及p沟道器件,以将输出向下拉,用于相反的转变,使之达到在 p通道设备。 驱动器电路包括通过将p(n)沟道晶体管的n(p)阱连接到输出节点来消除体效应的装置。 驱动器电路提供降低的摆幅低噪声输出,减少电源的崩溃。 驱动电路为输出传输线提供适当的阻抗匹配,从而可以终止输出传输线,以消除反射。
    • 9. 发明授权
    • Substrate solution for back gate controlled SRAM with coexisting logic devices
    • 用于具有共存逻辑器件的背栅控制SRAM的衬底解决方案
    • US07838942B2
    • 2010-11-23
    • US12144272
    • 2008-06-23
    • Robert H. DennardWilfried E. HaenschArvind KumarRobert J. Miller
    • Robert H. DennardWilfried E. HaenschArvind KumarRobert J. Miller
    • H01L29/76
    • H01L27/1108
    • A semiconductor structure that includes at least one logic device region and at least one static random access memory (SRAM) device region wherein each device region includes a double gated field effect transistor (FET) wherein the back gate of each of the FET devices is doped to a specific level so as to improve the performance of the FET devices within the different device regions is provided. In particular, the back gate within the SRAM device region is more heavily doped than the back gate within the logic device region. In order to control short channel effects, the FET device within the logic device region includes a doped channel, while the FET device within the SRAM device region does not. A none uniform lateral doping profile with a low net doping beneath the source/drain regions and a high net doping underneath the channel would provide additional SCE control for the logic device.
    • 一种半导体结构,其包括至少一个逻辑器件区域和至少一个静态随机存取存储器(SRAM)器件区域,其中每个器件区域包括双门控场效应晶体管(FET),其中每个FET器件的背栅极掺杂 提供了特定的水平,以提高不同器件区域内的FET器件的性能。 特别地,SRAM器件区域内的背栅极比逻辑器件区域内的后栅极重掺杂。 为了控制短沟道效应,逻辑器件区域内的FET器件包括掺杂沟道,而SRAM器件区域内的FET器件不是。 在源极/漏极区域之下具有低净掺杂的非均匀横向掺杂分布和在沟道下方的高净掺杂将为逻辑器件提供附加的SCE控制。
    • 10. 发明申请
    • SUBSTRATE SOLUTION FOR BACK GATE CONTROLLED SRAM WITH COEXISTING LOGIC DEVICES
    • 用于具有共同逻辑设备的后盖控制SRAM的基板解决方案
    • US20080258221A1
    • 2008-10-23
    • US12144272
    • 2008-06-23
    • Robert H. DennardWilfried E. HaenschArvind KumarRobert J. Miller
    • Robert H. DennardWilfried E. HaenschArvind KumarRobert J. Miller
    • H01L27/11
    • H01L27/1108
    • A semiconductor structure that includes at least one logic device region and at least one static random access memory (SRAM) device region wherein each device region includes a double gated field effect transistor (FET) wherein the back gate of each of the FET devices is doped to a specific level so as to improve the performance of the FET devices within the different device regions is provided. In particular, the back gate within the SRAM device region is more heavily doped than the back gate within the logic device region. In order to control short channel effects, the FET device within the logic device region includes a doped channel, while the FET device within the SRAM device region does not. A none uniform lateral doping profile with a low net doping beneath the source/drain regions and a high net doping underneath the channel would provide additional SCE control for the logic device.
    • 一种半导体结构,其包括至少一个逻辑器件区域和至少一个静态随机存取存储器(SRAM)器件区域,其中每个器件区域包括双门控场效应晶体管(FET),其中每个FET器件的背栅极掺杂 提供了特定的水平,以提高不同器件区域内的FET器件的性能。 特别地,SRAM器件区域内的背栅极比逻辑器件区域内的后栅极重掺杂。 为了控制短沟道效应,逻辑器件区域内的FET器件包括掺杂沟道,而SRAM器件区域内的FET器件不是。 在源极/漏极区域之下具有低净掺杂的非均匀横向掺杂分布和在沟道下方的高净掺杂将为逻辑器件提供附加的SCE控制。