Panasonic published Digital Camera System Solution Guide 2012 describing its products for digital still camera applications. The 17.78MP 2.8um-pixel MN34070 sensor is said to feature "Micromachined cell technology" delivering "high resolution performance". I'm not sure what the micro-machining means , especially since Chipworks reverse engineering report does not mention anything unusual about its pixel structure.
Panasonic Semiconductor Selection Guide 2012 shows a next generation of 1/2.33-inch 1.43um-pixel MN34110 sensor, the MN34120, featuring 1.335um pixels. The new sensor is marked as "under development", no parameters are shown.
Samsung published YSNR10 data for its 1.4um-generation BSI sensors. 8MP S5K3H7 YSNR10 is stated at 82 lux. The smaller HD video S5K8AA sensor based on the same pixels shows YSNR of 86 lux.