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    • 2. 发明专利
    • Semiconductor device and semiconductor device manufacturing method
    • 半导体器件和半导体器件制造方法
    • JP2014030014A
    • 2014-02-13
    • JP2013141215
    • 2013-07-05
    • Semiconductor Energy Lab Co Ltd株式会社半導体エネルギー研究所
    • YAMAZAKI SHUNPEIAIHARA YAMATOKAMINAGA MASAMI
    • H01L29/786G02F1/1368H01L21/28H01L21/336H01L51/50
    • PROBLEM TO BE SOLVED: To provide a semiconductor device which inhibits immersion of an impurity possibly causing variation in electrical characteristics into a semiconductor layer, and has stable electrical characteristics; and provide a manufacturing method of the semiconductor device.SOLUTION: A semiconductor device having a structure (so-called top-contact structure) having a source electrode and a drain electrode on a semiconductor layer comprises a structure in which a semiconductor layer at a position which does not overlap the source electrode or the drain electrode is made thinner than a semiconductor layer at a position which overlaps the source electrode or the drain electrode; a recess is provided in the semiconductor layer; and a rising part from a bottom face to a lateral face of the recess has a curved shape. In the structure, a lateral face of the source electrode or the drain electrode and the lateral face of the recess have no level difference.
    • 要解决的问题:提供一种半导体装置,其抑制可能引起电特性变化的杂质浸入到半导体层中,并且具有稳定的电特性; 并提供半导体器件的制造方法。解决方案:具有在半导体层上具有源电极和漏极的结构(所谓的顶部接触结构)的半导体器件包括其中位于半导体器件的位置处的半导体层的结构 与源极电极或漏极电极重叠的位置的半导体层的厚度比源极电极或漏极电极重叠的位置薄, 在半导体层中设置凹部; 并且从凹部的底面到侧面的上升部分具有弯曲的形状。 在该结构中,源电极或漏电极的侧面和凹部的侧面没有电平差。