A comment in here, about a colour filter sounds a bit like Foveon.\n\n[URL]http://www.physorg.com/news5184.html[/URL]\n\nIBM announced a CMOS image sensor development and manufacturing\ncollaboration with Kodak in September, 2004, which included the\nlicense of Kodak CMOS image sensor fabrication intellectual property\nto IBM. Kodak this week announced new three- and five-megapixel CMOS\nimage sensors qualified and manufactured for Kodak by IBM's\nsemiconductor facility in Burlington, Vermont, that utilize this\nprocess.\n\nIBM's foundry offering is based on IBM's 0.18-micron copper CMOS\nmanufacturing process, available at its Burlington facility, that\nfeatures an integrated design kit, including a 4-transistor, 3-micron\npixel with pinned diode, and access to IBM's image sensor circuit\nlibrary.\n\nIBM's CMOS technology delivers image sensors with one of the\nindustry's best "dark current" performance, or the ability to capture\nphotos in low-light situations, a key feature for consumer\napplications such as camera cell phones.\n\nImage quality can also be improved through IBM's ability to produce\nsensors featuring an ultra-thin, 2.5-micron copper stack incorporating\nan on-chip color filter and microlens. The copper stack is\napproximately 30 percent thinner than standard aluminum-based\nprocesses, which can result in significant improvements in light\ncollection efficiency (quantum efficiency) for improved picture\nquality in low light. In addition, IBM's angle response performance -\-\nimportant when using lenses with wider apertures -\- delivers superior\nphoto resolution and sharpness.\n\nCurrently, IBM is the only foundry supplier producing image sensors\nbased on 0.18-micron copper process technology. IBM was the first\nsemiconductor manufacturer to introduce copper technology and foundry\nclients can benefit from the company's successful copper production\ntrack record. In addition, IBM offers access to industry-recognized\ndesign kits and a comprehensive circuit library.\n\n"IBM is bringing its extensive copper semiconductor process experience\nto bear on the CMOS image sensor market, offering clients what we\nbelieve is the best foundry technology available today," said Tom\nReeves, vice president, semiconductor products for IBM Systems &\nTechnology Group. "Our innovative technology produces sensors with\nexcellent color accuracy, low noise and very competitive low-light\nperformance that can help clients differentiate their products in this\ncompetitive and growing consumer market."\n\n"We are pleased to see Kodak's image sensor technology at the heart of\nIBM's new foundry offering," said Chris McNiffe, General Manager of\nKodak's Image Sensor solutions business. "Our collaboration with IBM\nhas been extremely successful thus far, leveraging our respective\nstrengths in imaging and semiconductor manufacturing."\n\nImage sensor market growth is shifting from charged coupled devices\n(CCDs) to CMOS-based sensors. CCDs have been the predominant\ntechnology used in digital imaging products due to improved picture\nquality, but CMOS technology benefits can include low power, high\nintegration and low production costs compared to CCDs, all important\nbenefits for consumer applications. IBM's foundry technology roadmap\nwill enable CMOS-based image sensors that approach the size and\nperformance of CCD pixels offered today.