发明名称 |
Phototransistor and semiconductor device |
摘要 |
A phototransistor includes a first emitter region, a first base region having at least a portion exposed to a light-receiving side, and a first collector region in this order from the light-receiving side in a depth direction. The first collector region includes a second collector region and a third collector region that is in contact with a downstream side of the second collector region in the depth direction and has a resistance lower than that of the second collector region. The phototransistor further includes a first region that is spaced away from the first base region at an outer side of the first base region on a light-receiving side surface thereof, the first region having a conductivity type opposite to that of the first collector region. |
申请公布号 |
US9472584(B2) |
申请公布日期 |
2016.10.18 |
申请号 |
US201514604825 |
申请日期 |
2015.01.26 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
Negoro Takaaki;Miki Yoshihiko;Sakurano Katsuyuki;Tsuda Keiji;Watanabe Hirofumi |
分类号 |
H01L31/101;H01L27/144;H01L31/02;H01L27/146 |
主分类号 |
H01L31/101 |
代理机构 |
Cooper & Dunham LLP |
代理人 |
Cooper & Dunham LLP |
主权项 |
1. A phototransistor comprising a first emitter region, a first base region having at least a portion exposed to a light-receiving side, and a first collector region in this order from the light-receiving side in a depth direction, wherein
the first collector region includes a second collector region and a third collector region that is in contact with a downstream side of the second collector region in the depth direction and has a resistance lower than that of the second collector region, the phototransistor further comprises a first region that is spaced away from the first base region at an outer side of the first base region on a light-receiving side surface thereof, the first region having a conductivity type opposite to that of the first collector region, and the first region is grounded, and wherein the phototransistor further comprises a collector contact region at an outer side of the first region on the light-receiving side surface thereof, the collector contact region being electrically connected to the first collector region, and wherein a depletion layer is formed between the first region and the collector contact region. |
地址 |
Tokyo JP |