The first epitaxial layer is disposed over the substrate and doped to have the first conductivity type as well.

第一外延层被布置在衬底之上并且被掺杂为也具有第一导电类型。

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The collector layer is selectively disposed over at least a portion of the first epitaxial layer and doped to have a second conductivity type.

收集器层被选择性地布置在第一外延层的至少一部分上并且被掺杂为具有第二导电类型。

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The second epitaxial layer is disposed over the collector layer and doped to have the first conductivity type.

第二外延层被布置在收集器层上并且被掺杂为具有第一导电类型。

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The second epitaxial layer is disposed over the collector layer and doped to have the first conductivity type.

第二外延层被布置在收集器层上并且被掺杂为具有第一导电类型。

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