CMOS Image Sensors Pushing CCDs Out Of The Picture
Tuesday, February 14th, 2012Complementary metal-oxide semiconductor (CMOS) image sensors continue to expand their already commanding lead of the overall image sensor market, pushing charge coupled device CCD sensors into an increasingly isolated space. In 2011, CMOS sensor shipments accounted for 92% of all area image sensors, equaling 2.1 billion units, according to an IHS iSuppli Consumer Platforms topical report. CCD sensor shipments made up the remaining 8% of the market, equaling 180.3 million units shipped.
IHS predicts that, by 2015, CMOS shipments will amount to 3.6 billion units or 97% market share, leaving just 95.2 million CCD shipments to make up the remaining 3% of the market. According to Pamela Tufegdzic, analyst for consumer electronics at IHS, “CMOS sensors long have been associated with cheaper manufacturing costs, greater efficiency and faster data-throughput speeds. For those reasons, CMOS sensor use has kept expanding in an ever-growing number of devices and applications, while the use of higher-cost CCDs has shrunk steadily.”

Mobile handsets remain the dominant application for CMOS sensors, representing 79 percent of total CMOS shipments in 2011. Videoconferencing is the second-biggest application market in terms of CMOS shipments, due to the inclusion of cameras in notebook computers. CMOS sensors also found increasing use in two growing markets—the security space through network video surveillance systems; and in automotive systems through the use of back-up cameras and in such applications as lane-departure warning, blind-spot detection and infrared night vision.
In comparison, CCDs are finding acceptance in the industrial markets and in digital still cameras. But even here, CCD use is declining. Among high-end digital single lens reflex (DSLR) cameras, for instance, CCD use will shrink from 12 percent in 2011 to just 1 percent by 2014. And because the camera space is weakening as a whole while consumers gravitate toward smartphones, overall CCD consumption will decline further, IHS believes.
According to IHS, "the introduction of backside illumination (BSI) technology was the break in camera technology that gave CMOS the edge over CCD". BSI is projected to be in 56% of smartphones and higher-end feature handset camera phones during 2012, and in 92% of the same class of handsets by 2015. IHS believes that image sensor companies will be expected to continue reinforcing their CMOS business models while exploring ways to be the first to market leading-edge solutions. They also state that "it is imperative for the industry to bring down the price of BSI technology, which will be critical in securing its place in the CMOS market".
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