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    • 27. 发明公开
    • TAILORING GATE WORK-FUNCTION IN IMAGE SENSORS
    • 在BILDSENSOREN的ANPASSUNG DER GATE-WORKFUNKTION
    • EP1642340A1
    • 2006-04-05
    • EP04755883.8
    • 2004-06-22
    • MICRON TECHNOLOGY, INC.
    • MOULI, Chandra
    • H01L27/146
    • H01L27/14643H01L27/14603H01L27/14609
    • Embodiments of the invention provide a method of forming a pixel cell and the resultant pixel cell a photo-conversion device formed at a surface of a substrate and a transistor adjacent to the photo-conversion device. The transistor comprises a gate overlying a channel region. The gate comprises at least one gate region having a work-function greater than a work-function of n+ polysilicon. The channel region comprises respective portions below each gate region. A dopant concentration in at least one portion of the channel region is determined at least in part by the work-function of the respective gate region.
    • 本发明的实施例提供一种形成像素单元的方法,并且所得到的像素单元形成在与光转换器件相邻的衬底和晶体管的表面处的光转换器件。 晶体管包括覆盖沟道区的栅极。 栅极包括具有大于n +多晶硅的功函数的功函数的至少一个栅极区。 沟道区域包括每个栅极区域下方的相应部分。 沟道区域的至少一部分中的掺杂剂浓度至少部分地由相应栅极区域的功函数确定。