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    • 34. 发明授权
    • Ink jet head structure having MOS transistors for power supply, and head substrate, ink jet cartridge, and ink jet apparatus having the same
    • 具有用于供电的MOS晶体管的喷墨头结构,以及头基板,喷墨墨盒和具有该喷墨头的喷墨装置
    • US06267470B1
    • 2001-07-31
    • US08780607
    • 1997-01-08
    • Hidenori Watanabe
    • Hidenori Watanabe
    • B41J205
    • B41J2/14129B41J2/14072B41J2002/14379B41J2202/13
    • An ink jet head is provided with heaters to generate energy to be utilized for discharging ink, and MOS transistors to supply electric power to the heaters for recording by discharging ink. For this ink jet head, the MOS transistors comprise source regions and drain regions formed by doping layers arranged near the surface of a semiconductor substrate, gates formed on the semiconductor substrate through an oxide film and arranged to cross over the source regions and the drain regions, and contact units formed by a doping layer different from that of the source regions, and arranged near the surface within the source regions in order to draw out electrons or holes to be unintentionally generated on the semiconductor substrate. With the structure thus arranged, the potential difference becomes smaller between the source regions and back gate area on the semiconductor substrate, making it possible to prevent heaters from being destroyed by any excessive current that may flow uncontrollably.
    • 喷墨头设置有加热器以产生用于排放墨水的能量,以及MOS晶体管,以通过排出墨水向加热器供应电力进行记录。 对于该喷墨头,MOS晶体管包括源极区和漏极区,其通过配置在半导体衬底的表面附近的掺杂层形成,栅极通过氧化膜形成在半导体衬底上并被布置成跨越源极区和漏极区 以及由与源极区域不同的掺杂层形成的接触单元,并且布置在源极区域内的表面附近,以便画出在半导体衬底上无意中产生的电子或空穴。 利用如此布置的结构,半导体衬底上的源极区域和背栅极区域之间的电位差变小,使得可以防止加热器被不可控制地流过的任何过大的电流而损坏。