Patent ID: 9472706
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, the method comprising: forming a trench, in a vertical direction of a semiconductor substrate having a plurality of phototransistors arranged on the semiconductor device, at positions between the phototransistors that are next to each other; forming a first conductive-material layer in and above the trench by implanting a first conductive material into the trench after an oxide film is formed on an inner wall of the trench; forming a first conductor by removing the first conductive-material layer excluding a first conductive portion of the first conductive-material layer implanted into the trench; forming an upper gate electrode above the first conductor, the upper gate electrode being disposed in a vertical direction above the first conductor and being configured to be conductive with the first conductor; and forming a first impurity diffused layer having a same conductivity type as the upper gate electrode, the first impurity diffused layer contacting the upper gate electrode.