Patent ID: 6930338
Filing Date: 2005-08-16
Classification: H01L

Abstract:
1. A unit pixel for use in a complementary metal oxide semiconductor (CMOS) image sensor, comprising: a photodiode formed in a predetermined location of an active area; a transfer transistor disposed between the photodiode and a floating diffusion node, wherein a transfer control signal is applied to a gate; a reset transistor disposed between the photodiode and a power supply voltage (VDD) terminal, wherein a reset control signal is applied to a gate and a VDD is applied to a drain; a drive transistor of which a drain is connected to the VDD terminal and a gate is connected to the floating diffusion node; a selection transistor of which a drain is connected to a source of the drive transistor and a source is connected to an output terminal, wherein a selection control signal is applied to a gate; and a dummy transistor disposed between the drive transistor and the floating diffusion node, of which a gate is connected to the floating diffusion node.