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    • 25. 发明授权
    • Bipolar epitaxial cascode with low-level base connection
    • 具有低电平基极连接的双极外延级共源共栅
    • US5399899A
    • 1995-03-21
    • US173839
    • 1993-12-27
    • Ronald DekkerHenricus G. R. MaasDirk J. GravesteijnMartinus P. J. G. Versleijen
    • Ronald DekkerHenricus G. R. MaasDirk J. GravesteijnMartinus P. J. G. Versleijen
    • H01L21/331H01L21/8222H01L27/082H01L29/73H01L29/72
    • H01L27/0825
    • A semiconductor device with a semiconductor body (1) is provided with a first and a second bipolar transistor (T1, T2, respectively) in a cascode configuration, in which the semiconductor body (1) comprises, in that order, a collector region (10) and a base region (11) of the first transistor (T1), a region (12) which forms both an emitter region of the first transistor (T1) and a collector region of the second transistor (T2), a space charge region (13), and a base region (14) and emitter region (15) of the second transistor (T2), while the regions form pn junctions with one another which extend parallel to a main surface (2) of the semiconductor body (1). The base region (14) and the emitter region (15) of the second transistor (T2) adjoin a main surface (3) of the semiconductor body (1). According to the invention, a depression (4) is provided in this main surface (3), cutting through the emitter region (12) of the first transistor (T1) which at the same time is the collector region (12) of the second transistor (T2), the space charge region (13), and the base region (14) of the second transistor (T2) and laterally bounding these; regions, while a connection electrode (B1) for the base region (11) of the first transistor (T1) is provided in the depression (4). No latch-up by a parasitic transistor then takes place in the device.
    • 具有半导体本体(1)的半导体器件以共成型结构设置有第一和第二双极晶体管(T1,T2),其中半导体主体(1)依次包括集电极区域 10)和第一晶体管(T1)的基极区域(11),形成第一晶体管(T1)的发射极区域和第二晶体管(T2)的集电极区域的区域(12),空间电荷 区域(13)以及第二晶体管(T2)的基极区域(14)和发射极区域(15),同时区域形成彼此平行于半导体主体的主表面(2)延伸的pn结( 1)。 第二晶体管(T2)的基极区域(14)和发射极区域(15)与半导体本体(1)的主表面(3)相邻。 根据本发明,在该主表面(3)中设置凹陷(4),切割第一晶体管(T1)的发射极区域(12),同时是第二晶体管的集电极区域(12) 晶体管(T2),空间电荷区域(13)和第二晶体管(T2)的基极区域(14)并且横向地限制它们; 区域,而在第一晶体管(T1)的基极区域(11)的连接电极(B1)设置在凹部(4)中。 然后在器件中不会发生寄生晶体管的闩锁。