3 ms·
Given that silicon has quite a high refractive index, I do wonder if it would be possible to pull the same trick as the "immersive lithography" people here. But
by ajb 3y ago
Given that silicon has quite a high refractive index, I do wonder if it would be possible to pull the same trick as the "immersive lithography" people here. But I don't know enough about optics - I wonder if you can get away with a tiny air gap if most of the optical system is from higher refractive index material.
- kurthr 3y agoThat's an interesting idea. I think you might be able to do reflective optics around a single crystal silicon core in near contact to the wafer backside. You'd get another factor of 2.5x, which along with confocal imaging would be 50-65nm and that's almost good enough to image modern cells.
- ajb 3y agoCool! I guess this method would put some constraints on PCB design, since the need to scan the die physically would mean that you'd need a margin around it where nothing protruded higher vertically.