Patent ID: 7956392
Filing Date: 2011-06-07
Classification: H01L

Abstract:
1. An imaging element comprising: an optical element substrate part in which the imaging element generates a signal charge by photo-electrically converting an incident light applied from one surface side of the optical element substrate part to read the signal charge from the other surface side of the optical element substrate part and picks up an image, the optical element substrate part comprising: a first insulating layer; a photoelectric conversion layer to generate the signal charge by photo-electrically converting the incident light; a charge storage part that stores the signal charge; a reading transistor that reads the signal charge stored in the charge storage part; and a plug electrode to which the signal charge read by the reading transistor is transferred, said plug electrode being formed in the first insulating layer; a first micro bump that is connected to the plug electrode, said first micro bump being formed in the first insulating layer; and a CMOS circuit substrate part connected to the other surface side of the optical element substrate part so as to transfer the signal charge generated in the photoelectric conversion layer, the CMOS circuit substrate part comprising: wherein the plug electrode of the optical element substrate part is connected to the second micro bump of the CMOS circuit substrate part, the signal charge transferred to the plug electrode is further transferred to the second micro bump, and the first micro bump is smaller in size than the second micro bump.