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    • 5. 发明申请
    • BIPOLAR TRANSISTOR HAVING SINKER DIFFUSION UNDER A TRENCH
    • 双极晶体管具有在TRENCH下的SINKER扩展
    • WO2015003102A1
    • 2015-01-08
    • PCT/US2014/045326
    • 2014-07-02
    • TEXAS INSTRUMENTS INCORPORATEDTEXAS INSTRUMENTS JAPAN LIMITED
    • EDWARDS, Henry, LitzmannSALMAN, Akram, A.
    • H01L29/72H01L21/331
    • H01L29/7322H01L27/0248H01L27/0259H01L29/0649H01L29/0821H01L29/732
    • In described examples, a bipolar transistor (100) includes: a substrate (105) having a semiconductor surface (106); and first and second trench enclosures (121, 122), both at least lined with a dielectric extending downward from a topside (106a) of the semiconductor surface (106) to a trench depth. The first trench enclosure (121) defines an inner enclosed area. A base (140) and an emitter (150) formed in the base (140) are within the inner enclosed area. A buried layer (126) is below the trench depth, including under the base (140). A sinker diffusion (115) includes a first portion (115a) between the first and second trench enclosures (121, 122), extending from the topside (106a) of the semiconductor surface (106) to the buried layer, and a second portion (115b) within the inner enclosed area. The second portion (115b) does not extend to the topside (106a) of the semiconductor surface (106).
    • 在所述实施例中,双极晶体管(100)包括:具有半导体表面(106)的衬底(105); 以及第一和第二沟槽外壳(121,122),其至少衬有从半导体表面(106)的顶侧(106a)向下延伸到沟槽深度的电介质。 第一沟槽外壳(121)限定内封闭区域。 形成在基座(140)中的基座(140)和发射器(150)在内部封闭区域内。 掩埋层(126)在沟槽深度之下,包括在基底(140)下方。 沉降片扩散(115)包括从半导体表面(106)的顶侧(106a)延伸到掩埋层的第一和第二沟槽外壳(121,122)之间的第一部分(115a)和第二部分 115b)在内封闭区域内。 第二部分(115b)不延伸到半导体表面(106)的顶侧(106a)。