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Productivity and Sensitivity Improved Image Sensor

PURPOSE: An image sensor is provided to be capable of improving productivity, and considerably reducing leakage noise or thermal noise for improving sensitivity. CONSTITUTION: An image sensor is provided with an oxide layer(4) formed on a semiconductor substrate, a gate electrode(1) formed on the oxide layer, a photo diode N type region(2) spaced apart from one side of the gate electrode in the semiconductor substrate, and an N+ type region as a floating diffusion region(3) spaced apart from the other side of the gate electrode in the semiconductor substrate. Preferably, the image sensor further includes an isolation region. At this time, the isolation region includes a P type impurity region formed in the semiconductor substrate and a light shielding layer formed on the isolation region. Preferably, the light shielding layer is made of SiO2.