<div id="linkdxomark">This a comment for <a href="http://www.dxomark.com/index.php/Cameras/Camera-Sensor-Database/Nikon/D3200">this page on the website</a></div>I think you are wrong about the identity of this sensor, it is not the Sony NEX sensor - at least it does not look like an Exmor and it is a different size. I think when you come to test it, it will show more in common with the D4 sensor than the Sony ones.
It is Sony. All current Nikon cameras have sensor made by Sony. In case of D3200 its designed and made by Sony. Probably left-overs from A65. D4 is designed by Nikon, made by Sony. Nikon actually can design sensors and they are pretty good in that (D700, D3, D3s are their designs). Sony just gives them manufacturing capacities.
Only exception so far is Nikon 1 series.
There is quite a lot of CMOS manufacturers but no one except Sony is able to get this results. They lack both know-how and funding for that.
You can check for example Samsung 20 mpix APS-C sensor. While its decent, its nowhere close to Sony. And we are talking about Samsung which is incredibly huge company. But their "know-how" simply isnt there yet.