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    • 61. 发明授权
    • Semiconductor device comprising buried channel region
    • 半导体器件包括掩埋沟道区域
    • US06642581B2
    • 2003-11-04
    • US10101950
    • 2002-03-21
    • Satoshi MatsudaAtsushi Azuma
    • Satoshi MatsudaAtsushi Azuma
    • H01L2976
    • H01L29/66537H01L21/266H01L21/28079H01L21/28114H01L29/1083H01L29/42368H01L29/42376H01L29/495H01L29/66545H01L29/6656H01L29/7838
    • A semiconductor device includes a gate insulating film formed on a semiconductor substrate between first diffusion layers, a gate electrode including a first gate portion formed on the gate insulating film and a second gate portion formed on the first gate portion, a first width in a channel direction of the first gate portion being substantially equal to a width in that of the gate insulating film, and a second width in the channel direction of the second gate portion being larger than the first width, a gate side wall insulating film including a first side wall portion formed on a side surface of the first gate portion and the gate insulating film and a second side wall portion formed on a side surface of the second gate portion, and a second diffusion layer formed apart from the first diffusion layers below the gate insulating film.
    • 半导体器件包括形成在第一扩散层之间的半导体衬底上的栅极绝缘膜,包括形成在栅极绝缘膜上的第一栅极部分的栅电极和形成在第一栅极部分上的第二栅极部分,沟道中的第一宽度 第一栅极部分的方向基本上等于栅极绝缘膜的宽度,并且第二栅极部分的沟道方向上的第二宽度大于第一宽度;栅极侧壁绝缘膜,包括第一侧 形成在第一栅极部分和栅极绝缘膜的侧表面上的壁部分和形成在第二栅极部分的侧表面上的第二侧壁部分,以及与栅极绝缘下方的第一扩散层分开形成的第二扩散层 电影。