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    • 10. 发明专利
    • Semiconductor device and manufacturing method of the same
    • 半导体器件及其制造方法
    • JP2014187208A
    • 2014-10-02
    • JP2013061148
    • 2013-03-22
    • Toshiba Corp株式会社東芝
    • KITAMURA MASAYUKISAKATA ATSUKOISHIZAKI KENJIWAKATSUKI SATOSHI
    • H01L27/10H01L21/3205H01L21/768
    • H01L23/53261H01L21/76877H01L23/53209H01L23/53238H01L23/53257H01L27/105H01L2924/0002H01L2924/00
    • PROBLEM TO BE SOLVED: To provide a semiconductor device having a multilayer wiring structure which can inhibit an increase in resistance of wiring; and provide a manufacturing method of the semiconductor device.SOLUTION: A semiconductor device according to an embodiment comprises a substrate 1, a first interlayer insulation layer 2, a second interlayer insulation layer 3, a first trench 4, first wiring 6a, a second trench 5 and second wiring 7a. The first interlayer insulation layer is provided on the substrate. The second interlayer insulation layer is provided on the first interlayer insulation layer. The first trench pierces the second interlayer insulation layer from a surface of the second interlayer insulation layer and has a width less than twice a thickness of the second interlayer insulation layer. The first wiring is composed of first metal and buried in the first trench. The second trench pierces the second interlayer insulation layer from the surface of the second interlayer insulation layer and has a width larger than the width of the first trench. The second wiring is composed of second metal and buried in the second trench. The first metal has a shorter electron mean free path than an electron mean free path in the second metal.
    • 要解决的问题:提供一种可抑制布线电阻增加的具有多层布线结构的半导体器件; 并提供半导体器件的制造方法。根据实施例的半导体器件包括衬底1,第一层间绝缘层2,第二层间绝缘层3,第一沟槽4,第一布线6a,第二沟槽 5和第二布线7a。 第一层间绝缘层设置在基板上。 第二层间绝缘层设置在第一层间绝缘层上。 第一沟槽从第二层间绝缘层的表面刺穿第二层间绝缘层,并且具有小于第二层间绝缘层的厚度的两倍的宽度。 第一布线由第一金属构成,埋在第一沟槽中。 第二沟槽从第二层间绝缘层的表面刺穿第二层间绝缘层,其宽度大于第一沟槽的宽度。 第二布线由第二金属构成并埋在第二沟槽中。 第一金属具有比第二金属中的电子平均自由程更短的电子平均自由程。