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    • 10. 发明申请
    • ACTUATOR CHIP FOR INKJET PRINTHEAD WITH ELECTROSTATIC DISCHARGE PROTECTION
    • 用于静电放电保护的喷墨打印机的执行器芯片
    • WO2007095380A2
    • 2007-08-23
    • PCT/US2007/004176
    • 2007-02-13
    • LEXMARK INTERNATIONAL, INCYOUNG, Jason, K.RODRIGUEZ, Nicole, M
    • YOUNG, Jason, K.RODRIGUEZ, Nicole, M
    • B41J2/0458B41J2/04511B41J2/04541B41J2/14072
    • An inkjet printhead chip includes electrostatic discharge (ESD) circuits to protect the chip during ESD events, such as one especially to prevent a thin dielectric layer on a substrate from breakdown. In one embodiment, the chip includes an ESD circuit essentially dedicated per each actuator. In another, ESD circuits alternate connection between power and ground. In still another, actuators are approximately equidistantly spaced with respect to respective ESD circuits. Exemplary ESD circuits include a ballast resistor in series with a diode. In turn, diodes are either forward biased toward power or away from ground. In a thermal inkjet embodiment, a cavitation layer above a resistor and dielectric layer have pluralities of fingers connecting the cavitation layer to a metal buss. The metal buss attaches to the ballast resistors. Protection typically embodies the safe distribution of ESD current to ground during both chip manufacture and user printhead installation. InkJet printheads and printers are also disclosed.
    • 喷墨打印头芯片包括在ESD事件期间保护芯片的静电放电(ESD)电路,例如特别是防止衬底上的薄介电层击穿的静电放电(ESD)电路。 在一个实施例中,芯片包括每个致动器基本上专用的ESD电路。 另一方面,ESD电路在电源和地之间交替连接。 另一方面,致动器相对于各个ESD电路大致等距间隔开。 示例性ESD电路包括与二极管串联的镇流电阻器。 反过来,二极管正向偏置电源或远离地面。 在热喷墨实施例中,电阻器和电介质层上方的气蚀层具有将空化层连接到金属总线的多个指状物。 金属总线连接到镇流电阻。 在芯片制造和用户打印头安装期间,保护通常都体现了ESD电流对地面的安全分配。 喷墨打印头和打印机也被公开。