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    • 29. 发明授权
    • Lateral heterojunction bipolar transistor
    • 横向异质结双极晶体管
    • US06927428B2
    • 2005-08-09
    • US10818931
    • 2004-04-06
    • Jeffrey A. BabcockAngelo PintoGregory E. Howard
    • Jeffrey A. BabcockAngelo PintoGregory E. Howard
    • H01L21/84H01L27/12H01L29/423H01L29/73H01L29/737
    • H01L21/84H01L27/1203H01L29/42304H01L29/7317
    • A heterojunction bipolar transistor (30) in a silicon-on-insulator (SOI) structure is disclosed. The transistor collector (28), heterojunction base region (20), and intrinsic emitter region (25) are formed in the thin film silicon layer (6) overlying the buried insulator layer (4). A base electrode (10) is formed of polysilicon, and has a polysilicon filament (10f) that extends over the edge of an insulator layer (8) to contact the silicon layer (6). After formation of insulator filaments (12) along the edges of the base electrode (10) and insulator layer (8), the thin film silicon layer (6) is etched through, exposing an edge. An angled ion implantation then implants the heterojunction species, for example germanium and carbon, into the exposed edge of the thin film silicon layer (6), which after anneal forms the heterojunction base region (20). Polysilicon plugs for the emitter (24e) and collector (24c) are then formed, from which dopant diffuses to form the intrinsic emitter (25) and subcollector (22) of the device.
    • 公开了一种绝缘体上硅(SOI)结构中的异质结双极晶体管(30)。 在覆盖在掩埋绝缘体层(4)上的薄膜硅层(6)中形成晶体管集电极(28),异质结基极区(20)和本征发射极区(25)。 基极(10)由多晶硅形成,并且具有在绝缘体层(8)的边缘上延伸以接触硅层(6)的多晶硅细丝(10f)。 沿着基极(10)和绝缘体层(8)的边缘形成绝缘体细丝(12)之后,将薄膜硅层(6)蚀刻通过边缘露出。 然后,成角度的离子注入将异质结物质(例如锗和碳)注入到薄膜硅层(6)的暴露边缘中,其在退火后形成异质结基极区域(20)。 然后形成用于发射极(24e)和集电极(24c)的多晶硅插头,掺杂剂从该多晶硅插塞扩散以形成器件的本征发射极(25)和子集电极(22)。