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    • 5. 发明授权
    • Electrostatic-discharge protection circuit
    • 静电放电保护电路
    • US06268639B1
    • 2001-07-31
    • US09248547
    • 1999-02-11
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • H01L218222
    • H01L27/0251Y10S438/983
    • An ESD protection circuit includes a bipolar transistor, a resistor, and a zener diode formed on and within a semiconductor substrate. The resistor extends between the base and emitter regions of the transistor so that voltage developed across the resistor can turn on the transistor. The zener diode is formed in series with the resistor and extends between the base and collector regions of the transistor. Thus configured, breakdown current through the zener diode, typically in response to an ESD event, turns on the transistor to provide a nondestructive discharge path for the ESD. The zener diode includes anode and cathode diffusions. The cathode diffusion extends down into the semiconductor substrate in a direction perpendicular to the substrate. The anode diffusion extends down through the cathode diffusion into the semiconductor substrate. The anode diffusion extends down further than the cathode diffusion so that the zener diode is arranged vertically with respect to the substrate. The cathode diffusion can be formed using two separate diffusions, one of which extends deeper into the substrate than other.
    • ESD保护电路包括形成在半导体衬底上和半导体衬底内的双极晶体管,电阻器和齐纳二极管。 电阻器在晶体管的基极和发射极区域之间延伸,使跨越电阻器的电压可以导通晶体管。 齐纳二极管与电阻器串联形成,并在晶体管的基极和集电极区域之间延伸。 如此配置,通常通过齐纳二极管的击穿电流(通常响应于ESD事件)导通晶体管,以为ESD提供非破坏性的放电路径。 齐纳二极管包括阳极和阴极扩散。 阴极扩散沿垂直于衬底的方向向下延伸到半导体衬底中。 阳极扩散通过阴极扩散向下延伸到半导体衬底中。 阳极扩散比阴极扩散向下延伸,使得齐纳二极管相对于衬底垂直布置。 可以使用两个分开的扩散形成阴极扩散,其中一个扩散比其它扩散更深。
    • 6. 发明授权
    • Method of forming a zener diode
    • 形成齐纳二极管的方法
    • US06645802B1
    • 2003-11-11
    • US09877690
    • 2001-06-08
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • H01L218234
    • H01L27/0251Y10S438/983
    • An ESD protection circuit includes a bipolar transistor, a resistor, and a zener diode formed on and within a semiconductor substrate. The resistor extends between the base and emitter regions of the transistor so that voltage developed across the resistor can turn on the transistor. The zener diode is formed in series with the resistor and extends between the base and collector regions of the transistor. Thus configured, breakdown current through the zener diode, typically in response to an ESD event, turns on the transistor to provide a nondestructive discharge path for the ESD. The zener diode includes anode and cathode diffusions. The cathode diffusion extends down into the semiconductor substrate in a direction perpendicular to the substrate. The anode diffusion extends down through the cathode diffusion into the semiconductor substrate. The anode diffusion extends down further than the cathode diffusion so that the zener diode is arranged vertically with respect to the substrate. The cathode diffusion can be formed using two separate diffusions, one of which extends deeper into the substrate than other.
    • ESD保护电路包括形成在半导体衬底上和半导体衬底内的双极晶体管,电阻器和齐纳二极管。 电阻器在晶体管的基极和发射极区域之间延伸,使跨越电阻器的电压可以导通晶体管。 齐纳二极管与电阻器串联形成,并在晶体管的基极和集电极区域之间延伸。 如此配置,通常通过齐纳二极管的击穿电流(通常响应于ESD事件)导通晶体管,以为ESD提供非破坏性的放电路径。 齐纳二极管包括阳极和阴极扩散。 阴极扩散沿垂直于衬底的方向向下延伸到半导体衬底中。 阳极扩散通过阴极扩散向下延伸到半导体衬底中。 阳极扩散比阴极扩散向下延伸,使得齐纳二极管相对于衬底垂直布置。 可以使用两个分开的扩散形成阴极扩散,其中一个扩散比其它扩散更深。
    • 10. 发明授权
    • Pass gate circuit with body bias control
    • 通过门电路与体偏置控制
    • US5880620A
    • 1999-03-09
    • US840582
    • 1997-04-22
    • Daniel GitlinSheau-Suey LiMartin L. VoogelTiemin Zhao
    • Daniel GitlinSheau-Suey LiMartin L. VoogelTiemin Zhao
    • G11C5/14H03K17/06H03K3/01
    • G11C5/146H03K17/063H03K2217/0018
    • A pass gate circuit includes a pass transistor and a body bias control circuit for biasing the body of the pass transistor to reduce body effect. The body bias control circuit includes one or more control transistors arranged to selectively connect the substrate (body) of the pass transistor to the drain or gate of the pass transistor when predetermined voltages are applied to the drain and gate of the pass transistor. As a result, the pass transistor exhibits a reduced body effect in the on-state. In one embodiment, the body bias control circuit includes a first control transistor having a drain and gate connected to the gate of the pass transistor, a gate connected to the drain of the pass transistor, and a source. The body bias control circuit also includes a second control transistor having a drain connected to the source of the first control transistor, a source connected to a body of the pass transistor, and a gate connected to the drain of the pass transistor. The bodies of the pass transistor, first control transistor and second control transistor are electrically interconnected. With this arrangement, the body of the pass transistor is biased "high" by the gate of the pass transistor only when both the gate and drain of the pass transistor are at a high voltage level.
    • 通路电路包括通过晶体管和体偏置控制电路,用于偏置通过晶体管的主体以减小体效应。 体偏置控制电路包括一个或多个控制晶体管,其布置成当预定电压施加到传输晶体管的漏极和栅极时,选择性地将传输晶体管的衬底(主体)连接到传输晶体管的漏极或栅极。 结果,通过晶体管在导通状态下表现出减小的体效应。 在一个实施例中,体偏置控制电路包括第一控制晶体管,其具有连接到传输晶体管的栅极的漏极和栅极,连接到传输晶体管的漏极的栅极和源极。 体偏置控制电路还包括第二控制晶体管,其具有连接到第一控制晶体管的源极的漏极,连接到传输晶体管的主体的源极和连接到通过晶体管的漏极的栅极。 传输晶体管,第一控制晶体管和第二控制晶体管的主体电互连。 通过这种布置,只有当传输晶体管的栅极和漏极都处于高电压电平时,传输晶体管的主体被传输晶体管的栅极偏置“高”。