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    • 15. 发明授权
    • Image sensor and method for fabricating the same
    • 图像传感器及其制造方法
    • US07897425B2
    • 2011-03-01
    • US12145441
    • 2008-06-24
    • In Cheol BaekKyung Min ParkSun Chan LeeHan Choon Lee
    • In Cheol BaekKyung Min ParkSun Chan LeeHan Choon Lee
    • H01L27/14H01L21/311
    • H01L27/14609H01L27/14689
    • A method for fabricating an image sensor. The method may include forming a gate, a photo diode, and a floating diffusion region on a pixel region of a semiconductor substrate; forming an oxide film on the pixel region and on an edge region of the semiconductor substrate; forming a sacrificial oxide layer by etching the oxide film using a first photoresist pattern as a mask; forming a metal layer on the first photoresist pattern, the gate, and the floating diffusion region; forming a salicide layer on the gate and the floating diffusion region; etching a remaining non-salicided portion of the metal layer, the first photoresist pattern, and the sacrificial oxide layer; forming an interlayer insulating film on the semiconductor substrate and planarizing the interlayer insulating film; and forming contact holes and forming an edge open part by etching the interlayer insulating film using a second photoresist pattern as a mask.
    • 一种图像传感器的制造方法。 该方法可以包括在半导体衬底的像素区域上形成栅极,光电二极管和浮动扩散区域; 在所述半导体衬底的像素区域和边缘区域上形成氧化物膜; 通过使用第一光致抗蚀剂图案作为掩模蚀刻氧化膜来形成牺牲氧化物层; 在第一光致抗蚀剂图案,栅极和浮动扩散区上形成金属层; 在栅极和浮动扩散区上形成硅化物层; 蚀刻金属层,第一光致抗蚀剂图案和牺牲氧化物层的剩余非水洗部分; 在所述半导体衬底上形成层间绝缘膜并使所述层间绝缘膜平坦化; 并且通过使用第二光致抗蚀剂图案作为掩模蚀刻层间绝缘膜来形成接触孔并形成边缘开口部。