The japanese website Egami discovered a new Panasonic patent which discloses a “3 layer sensor” that works like the current Foveon sensor from Sigma (Click here to read more about the Foveon sensor on Wikipedia). The new sensor will improve the color reproduction and image sharpness. It also has Back-side Illumination. The Patent No.2010-153658 has been published 2010/07/08 and filled 2008/12/25. We don’t expect Panasonic to announce any camera with that new sensor in 2010.
P.S.: Sigma is the only manufactorer that released cameras with such a tecnology. But many others (like Canon) are “experimenting” with the three layer sensors.