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    • 6. 发明授权
    • Buried subcollector for high frequency passive semiconductor devices
    • 埋地子集电极用于高频无源半导体器件
    • US07491632B2
    • 2009-02-17
    • US11164108
    • 2005-11-10
    • Douglas D. CoolbaughXuefeng LiuRobert M. RasselDavid C. Sheridan
    • Douglas D. CoolbaughXuefeng LiuRobert M. RasselDavid C. Sheridan
    • H01L21/425
    • H01L21/8249H01L29/0821H01L29/66272
    • A method of fabricating a buried subcollector in which the buried subcollector is implanted to a depth in which during subsequent epi growth the buried subcollector remains substantially below the fictitious interface between the epi layer and the substrate is provided. In particular, the inventive method forms a buried subcollector having an upper surface (i.e., junction) that is located at a depth from about 3000 Å or greater from the upper surface of the semiconductor substrate. This deep buried subcollector having an upper surface that is located at a depth from about 3000 Å or greater from the upper surface of the substrate is formed using a reduced implant energy (as compared to a standard deep implanted subcollector process) at a relative high dose. The present invention also provides a semiconductor structure including the inventive buried subcollector which can be used as cathode for passive devices in high frequency applications.
    • 一种制造掩埋子集电极的方法,其中将埋入的子集电极注入深度,其中在随后的外延生长期间,掩埋子集电极基本上保持在外延层和衬底之间的虚拟界面的下方。 特别地,本发明的方法形成了具有从半导体衬底的上表面位于距离大约或更大的深度的上表面(即结)的掩埋子集电极。 该深埋底部集电器具有从衬底的上表面位于距离大约等于或更大的深度的上表面,其使用相对高剂量的减少的注入能量(与标准深度植入子集电极过程相比) 。 本发明还提供了一种半导体结构,其包括本发明的掩埋子集电极,其可以用作高频应用中的无源器件的阴极。
    • 9. 发明授权
    • Semiconductor devices
    • 半导体器件
    • US07538409B2
    • 2009-05-26
    • US11422690
    • 2006-06-07
    • Xuefeng LiuRobert M. RasselSteven H. Voldman
    • Xuefeng LiuRobert M. RasselSteven H. Voldman
    • H01L29/00
    • H01L29/7436H01L27/0262H01L29/7378
    • A device comprises a first sub-collector formed in an upper portion of a substrate and a lower portion of a first epitaxial layer and a second sub-collector formed in an upper portion of the first epitaxial layer and a lower portion of a second epitaxial layer. The device further comprises a reach-through structure connecting the first and second sub-collectors and an N-well formed in a portion of the second epitaxial layer and in contact with the second sub-collector and the reach-through structure. The device further comprises N+ diffusion regions in contact with the N-well, a P+ diffusion region in contact with the N-well, and shallow trench isolation structures between the N+ and P+ diffusion regions.
    • 一种器件包括形成在衬底的上部中的第一子集电极和形成在第一外延层的上部中的第一外延层和第二子集电极的下部,以及第二外延层的下部 。 该装置还包括连接第一和第二子集电器的连通结构和形成在第二外延层的一部分中并与第二子集电器和达到通孔结构接触的N阱。 该装置还包括与N阱接触的N +扩散区,与N阱接触的P +扩散区,以及N +和P +扩散区之间的浅沟槽隔离结构。