The pixel size is 3.6um. Samsung says that BSI technology "improves the light sensitivity of each pixel and increases light absorption in peripheral areas by approximately 30 percent, resulting in crisper, sharper images compared to a conventional front-side illumination (FSI) pixel-based imager."
“To satisfy the increasing market need for high-end image sensors in digital cameras, Samsung has introduced this new imager, which features excellent higher resolution, superior image quality, and faster shooting speed with low power consumption,” said Kyushik Hong, VP of System LSI marketing, Samsung Electronics. “Based on its leadership in CMOS imaging technologies, Samsung will continue to address new trends in camera sensor markets.”