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    • 8. 发明授权
    • ESD protection structure and method
    • 具有沟槽隔离结构下植入物的ESD保护结构
    • US06218704B1
    • 2001-04-17
    • US08851973
    • 1997-05-07
    • Jeffrey S. BrownSteven J. HolmesRobert K. LeidySteven H. Voldman
    • Jeffrey S. BrownSteven J. HolmesRobert K. LeidySteven H. Voldman
    • H01L2362
    • H01L27/0288H01L27/0255H01L29/1083H01L2924/0002H01L2924/00
    • The preferred embodiment of the present invention overcomes the limitations of the prior art and provides a device and method to increase the robustness of electrostatic discharge (ESD) protection devices by reducing the temperature gradient caused by ESD pulses and reducing the likelihood of thermal runaway caused by large ESD pulses. The preferred embodiment forms implants under the trench isolation structures in the ESD devices. The implants reduce the current-caused heating that can lead to thermal runaway, and thus improve the robustness of the ESD protection device. In the preferred embodiment, the implants are formed using hybrid resist. The hybrid resist provides a method to form that implants that does not require additional masking steps or other excessive processing. Additionally, the hybrid resist provides implants that are self aligned with the well regions.
    • 本发明的优选实施例克服了现有技术的限制,并且提供了一种通过降低ESD脉冲引起的温度梯度并降低由于静电放电(ESD)保护装置引起的热失控的可能性而增加静电放电(ESD)保护装置的鲁棒性的装置和方法 大ESD脉冲。 优选实施例在ESD器件中的沟槽隔离结构之下形成植入物。 植入物减少导致热失控的电流引起的加热,从而提高ESD保护装置的鲁棒性。 在优选实施例中,使用混合抗蚀剂形成植入物。 混合抗蚀剂提供了形成不需要额外掩蔽步骤或其它过量处理的植入物的方法。 此外,混合抗蚀剂提供与阱区自对准的植入物。