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    • 43. 发明授权
    • Low capacitance transient voltage suppressor
    • 低电容瞬态电压抑制器
    • US08431999B2
    • 2013-04-30
    • US13072138
    • 2011-03-25
    • Yu-Shu ShenKun-Hsien LinChe-Hao ChuangRyan Hsin-Chin Jiang
    • Yu-Shu ShenKun-Hsien LinChe-Hao ChuangRyan Hsin-Chin Jiang
    • H01L23/62H01L21/336
    • H01L27/0255H01L29/861
    • A low capacitance transient voltage suppressor is disclosed. The suppressor comprises an N-type heavily doped substrate and an epitaxial layer formed on the substrate. At least one steering diode structure formed in the epitaxial layer comprises a diode lightly doped well and a first P-type lightly doped well, wherein a P-type heavily doped area is formed in the diode lightly doped well and a first N-type heavily doped area and a second P-type heavily doped area are formed in the first P-type lightly doped well. A second P-type lightly doped well having two N-type heavily doped areas is formed in the epitaxial layer. In addition, an N-type heavily doped well and at least one deep isolation trench are formed in the epitaxial layer, wherein the trench has a depth greater than or equal to depths of all the doped wells, so as to separate at least one doped well.
    • 公开了一种低电容瞬态电压抑制器。 抑制器包括N型重掺杂衬底和形成在衬底上的外延层。 形成在外延层中的至少一个转向二极管结构包括二极管轻掺杂阱和第一P型轻掺杂阱,其中在二极管轻掺杂阱中形成P型重掺杂区,并且第一N型重掺杂阱 在第一P型轻掺杂阱中形成掺杂区域和第二P型重掺杂区域。 在外延层中形成具有两个N型重掺杂区的第二P型轻掺杂阱。 此外,在外延层中形成N型重掺杂阱和至少一个深隔离沟槽,其中沟槽的深度大于或等于所有掺杂阱的深度,以便分离至少一个掺杂的 好。
    • 45. 发明授权
    • Lateral transient voltage suppressor for low-voltage applications
    • 用于低压应用的侧向瞬态电压抑制器
    • US08237193B2
    • 2012-08-07
    • US12837128
    • 2010-07-15
    • Che-Hao ChuangKun-Hsien LinRyan Hsin-Chin Jiang
    • Che-Hao ChuangKun-Hsien LinRyan Hsin-Chin Jiang
    • H01L29/06
    • H01L27/0255
    • A lateral transient voltage suppressor for low-voltage applications. The suppressor includes an N-type heavily doped substrate and at least two clamp diode structures horizontally arranged in the N-type heavily doped substrate. Each clamp diode structure further includes a clamp well arranged in the N-type heavily doped substrate and having a first heavily doped area and a second heavily doped area. The first and second heavily doped areas respectively belong to opposite conductivity types. There is a plurality of deep isolation trenches arranged in the N-type heavily doped substrate and having a depth greater than depth of the clamp well. The deep isolation trenches can separate each clamp well. The present invention avoids the huge leakage current to be suitable for low-voltage application.
    • 用于低电压应用的横向瞬态电压抑制器。 抑制器包括N型重掺杂衬底和水平地布置在N型重掺杂衬底中的至少两个钳位二极管结构。 每个钳位二极管结构还包括在N型重掺杂衬底中布置的具有第一重掺杂区域和第二重掺杂区域的钳位阱。 第一和第二重掺杂区域分别属于相反的导电类型。 在N型重掺杂衬底中布置有多个深的隔离沟槽,其深度大于夹具阱的深度。 深的隔离沟槽可以很好地分离每个夹具。 本发明避免了巨大的漏电流适合于低电压应用。