According to unconfirmed rumors, Apple has approached an individual who used to work for ST with a view to set up an Apple imaging center in the Grenoble area. Apparently, Apple is getting interested in ST's SPAD technology used in LG G3 for AF. The ex-ST individual is working to broker Apple access to this technology, based in Grenoble.
Seeing the recent stream of ToF patents from Primesense-Apple, one can speculate that Apple is contemplating the use of ST SPADs in its oncoming 3D camera.
Meanwhile, ST is reducing its image sensor footprint on the Edinburgh, Scotland site, pulling out of doing optical modules in the wake of continued reduced market share. Reportedly, Apple has had a recruitment day for image sensor designers in Edinburgh, with very select invites.
Update: The post has been updated according to a request I've received.