然后在基极区（7）的一部分上形成 包括比如发射极区的第一导电类型的第二半导体区域（8）。
Thereafter a second semiconductor region (8) of the first conductivity type, comprising, for example, an emitter region, is formed on a part of the base region (7).
此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。
In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.
结果表明该电阻与光敏区面积、发射区边长、发射区位置、发射极电流等因素有关。
Results show that the resistance relates to the area of the photo-excited region, the side length of the emitter region, the position of the emitter region, and the emitter current.
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