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    • 8. 发明授权
    • Methods of changing threshold voltages of semiconductor transistors by ion implantation
    • 通过离子注入来改变半导体晶体管的阈值电压的方法
    • US08039376B2
    • 2011-10-18
    • US11939578
    • 2007-11-14
    • William F. Clark, Jr.Edward Joseph Nowak
    • William F. Clark, Jr.Edward Joseph Nowak
    • H01L21/425
    • H01L21/26586H01L21/823431H01L29/105H01L29/66795H01L29/66803
    • A method for forming a semiconductor structure. The method includes providing a semiconductor structure including a semiconductor substrate. The semiconductor substrate includes (i) a top substrate surface which defines a reference direction perpendicular to the top substrate surface and (ii) a semiconductor body region. The method further includes implanting an adjustment dose of dopants of a first doping polarity into the semiconductor body region by an adjustment implantation process. Ion bombardment of the adjustment implantation process is in the reference direction. The method further includes (i) patterning the semiconductor substrate resulting in side walls of the semiconductor body region being exposed to a surrounding ambient and then (ii) implanting a base dose of dopants of a second doping polarity into the semiconductor body region by a base implantation process. Ion bombardment of the base implantation process is in a direction which makes a non-zero angle with the reference direction.
    • 一种形成半导体结构的方法。 该方法包括提供包括半导体衬底的半导体结构。 半导体衬底包括(i)限定垂直于顶部衬底表面的参考方向的顶部衬底表面和(ii)半导体本体区域。 该方法还包括通过调整注入工艺将第一掺杂极性的掺杂剂的调整剂量注入到半导体体区域中。 离子轰击调整植入过程在参考方向。 该方法还包括(i)对半导体衬底进行图形化,导致半导体体区域的侧壁暴露于周围环境,然后(ii)将碱性剂量的第二掺杂极性掺杂剂注入到半导体本体区域中, 植入过程。 基极注入工艺的离子轰击在与参考方向成非零角度的方向上。
    • 10. 发明授权
    • Method of forming a semiconductor structure
    • 形成半导体结构的方法
    • US07932134B2
    • 2011-04-26
    • US12610563
    • 2009-11-02
    • William F. Clark, Jr.Edward J. Nowak
    • William F. Clark, Jr.Edward J. Nowak
    • H01L21/00H01L21/84
    • H01L29/861H01L29/402H01L29/417H01L29/6609H01L29/772H01L29/78648
    • Disclosed is semiconductor structure that incorporates a field shield below a semiconductor device (e.g., a field effect transistor (FET) or a diode). The field shield is sandwiched between upper and lower isolation layers on a wafer. A local interconnect extends through the upper isolation layer and connects the field shield to a selected doped semiconductor region of the device (e.g., a source/drain region of a FET or a cathode or anode of a diode). Current that passes into the device, for example, during back-end of the line charging, is shunted by the local interconnect away from the upper isolation layer and down into the field shield. Consequently, an electric charge is not allowed to build up in the upper isolation layer but rather bleeds from the field shield into the lower isolation layer and into the substrate below. This field shield further provides a protective barrier against any electric charge that becomes trapped within the lower isolation layer or substrate.
    • 公开了在半导体器件(例如场效应晶体管(FET)或二极管)之下并入场屏蔽的半导体结构。 场屏蔽被夹在晶片上的上隔离层和下隔离层之间。 局部互连延伸穿过上隔离层并将场屏蔽连接到器件的选定掺杂半导体区域(例如,FET的二极管的源极/漏极区域或二极管的阴极或阳极)。 进入设备的电流,例如,在线路充电的后端,被远离上隔离层的局部互连分流,并进入场屏蔽。 因此,不允许在上部隔离层中积聚电荷,而是从场屏蔽件渗入下部隔离层并进入下面的基板。 该场屏蔽进一步提供抵抗掉在下隔离层或衬底内的任何电荷的保护屏障。