A 1/9-inch CIF format CCD image sensor for mobile phone

Abstract

We developed a 1/9-inch CIF format CCD image sensor for mobile phone. Needed specifications for mobile phone are low power consumption, small size and high sensitivity. For low power consumption, we decreased the driving voltage of CCD to operate with 2.8V signal power supply, so that 5 mW of CCD power consumption has been achieved. For small size, we shrank the optical size fiom 1/7-inch to 1/9-inch and adopted the wafer level CSP. For high sensitivity, we developed new inner lens and the sensitivity increased 20%. We developed the 2.8V single power supply camera module that adopted this CCD. Its power consumption is 47mW at 15fps.