Image sensor with load capacitors formed from common and individ

Details Image sensor with load capacitors formed from common and individ Image sensor with load capacitors formed from common and individ

1990-09-07

1991-12-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

35821318, H01J 4014

Patent

active

050702360

ABSTRACT:
An image sensor comprises a light-receiving element array, switching elements for transferring electric charges from the light-receiving element array, multilayer interconnection, load capacitors for storing the transferred electric charges, which includes one electrode which is an individual electrode and the other electrode which is a common electrode, the electrodes interposing an insulating layer therebetween, a drive IC for sequentially applying the electric charges, and common signal lines guiding the electric charges form capacitors to the drive IC. The image sensor is characterized in that, the individual electrode of the load capacitor constitutes an upper electrode, the common electrode of the load capacitor constitutes a lower electrode; and the insulating layer is formed of a high dielectric constant material. Therefore, the lower common electrode can be formed free from irregularities and the respective upper individual electrodes are also formed consistently. Further, the load capacitors can be formed small in size with a large capacitance.

REFERENCES:
patent: 4646155 (1987-02-01), Miyazawa et al.
patent: 4703169 (1987-10-01), Arita
patent: 4977304 (1990-12-01), Ino et al.
patent: 4992653 (1991-02-01), Kawahara et al.

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