The sensor inside the Nikon D5200 camera is made by Toshiba. This is what Chipworks discovered after they took apart the D5200:
In our recent technology blog entry on full-frame format image sensors, we speculated on the possibility of new entrants in the FF CIS space. What we didn’t expect was a new entrant into the APS-C game with Toshiba winning the primary CIS socket in the Nikon D5200.
FYI: the sensor inside the D3200 is made by Nikon.