I believe Sony uses ASML steppers. If they used Nikon's then all of Nikon's sensors would be made by Sony, but they are not. Carl-Zeiss also has a relationship with ASML which is also dating Sony.
The Nikon sensors made by whom BS.
People really need to move on of such a ridiculous and a nonsensical detail.
There are hundreds of computer manufactures - better said - hundreds of companies who put parts together to make computers. All of them use Intel, Texas Instruments, and dozens of other chip manufactures. Dell and Apple use an Intel processors, does that mean Dell or Intel makes Apple computers? - No. Apple is unique because what they design around those chips. Nikon is no different.
I get your frustration. I honestly couldn't care any less who makes the sensors just as long as they continue to offer the best in image quality. I mean even Sony uses Samsung to make their LCDs.
But I was just trying to say that if Nikon precision equipment were used to make the Sony sensors that were used in the Nikon cameras, then it'd would almost be like Nikon made their own sensors.
That's all. I didn't mean to start a debate.