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    • 94. 发明专利
    • Semiconductor device and manufacturing method thereof
    • 半导体器件及其制造方法
    • JP2008205136A
    • 2008-09-04
    • JP2007038644
    • 2007-02-19
    • Rohm Co Ltdローム株式会社
    • IWAMOTO KUNIHIKO
    • H01L21/314H01L21/31H01L29/78
    • H01L29/517H01L21/28185H01L21/28194H01L21/3142H01L29/513
    • PROBLEM TO BE SOLVED: To provide a semiconductor device comprising a gate insulating film having good interface characteristics with a semiconductor substrate, a large physical film thickness, and a high permittivity, and to provide a manufacturing method thereof.
      SOLUTION: An insulating layer 12 is formed by carrying out first treatment for forming a metal oxide layer 25 containing a metal element (hafnium) and oxygen on a silicon oxide layer 24 after forming the silicon oxide layer 24 on a silicon substrate 11, and second treatment for heating the silicon oxide layer 24 and the metal oxide layer 25 under a nitriding atmosphere. The first treatment and the second treatment are alternately repeated by two or more times.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 解决的问题:提供一种半导体器件,其包括与半导体衬底具有良好的界面特性的栅极绝缘膜,大的物理膜厚度和高介电常数,并提供其制造方法。 解决方案:在硅衬底11上形成氧化硅层24之后,在氧化硅层24上进行用于形成含有金属元素(铪)和氧的金属氧化物层25的第一处理来形成绝缘层12 ,以及在氮化气氛下加热氧化硅层24和金属氧化物层25的第二处理。 第一次处理和第二次处理交替重复两次以上。 版权所有(C)2008,JPO&INPIT