Will scanners make affordable full frame sensors possible?

Started Aug 26, 2012 | Discussions thread
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malcolm82
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Will scanners make affordable full frame sensors possible?
Aug 26, 2012

The need for stitching for full frame sensors due to the stepper projection size being too small is often given as a reason for their supposed prohibitive cost for mid-range camera's.

http://en.wikipedia.org/wiki/Stepper

As of 2008, the most detailed patterns in semiconductor device fabrication are transferred using a type of stepper called a scanner, which moves the wafer and reticle with respect to each other during the exposure, as a way of increasing the size of the exposed area and increasing the imaging performance of the lens.

They also mention a field size of 35x25mm, though since this is a scanner the width should be easy to increase.

So i am wondering how long it will be before these fabs from 2008 will start to be used for sensor fabrication? How old are the current best fabs used for sensors?

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