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A comment on First commercial curved CMOS sensor from startup CURVE. Parent comment

Re:First commercial curved CMOS sensor from startup CURVE by wmf on Tuesday December 15, 2020 @03:22PM (#25434711)
If you thin a silicon die enough it becomes flexible. I suspect they're using a standard planar fab then thinning the die and mounting it on some curved substrate.
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Re:First commercial curved CMOS sensor from startup CURVE by nickff on Tuesday December 15, 2020 @03:40PM (#25434960)
They may even just be using relief cuts in the die to produce the effect. Reliefs have a number of advantages, including reducing twisting and buckling.
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Re:First commercial curved CMOS sensor from startup CURVE by londons_explore on Tuesday December 15, 2020 @03:43PM (#25434992)
But not flexible in 3 dimensions...

(Ie. You can curve it around a cylinder, but not around a sphere)

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Re:First commercial curved CMOS sensor from startup CURVE by grovellogic on Wednesday December 16, 2020 @11:42AM (#25444668)
If you want to dive deeper into the issues look into Developable Surfaces https://en.wikipedia.org/wiki/Developable_surface
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Re:First commercial curved CMOS sensor from startup CURVE by sudosysgen on Tuesday December 15, 2020 @03:48PM (#25435043)
Wouldn't different thicknesses allow this?
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Re:First commercial curved CMOS sensor from startup CURVE by vel0city on Tuesday December 15, 2020 @07:01PM (#25437172)
Take a sheet of paper and wrap it around a ball. Notice how it folds?

If you could take a flat surface and have it represent the surface of a sphere without warping (or vice-versa), we wouldn't have constant debates about what kind of map projections are best.

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Re:First commercial curved CMOS sensor from startup CURVE by plasticchris on Tuesday December 15, 2020 @11:13PM (#25438976)
Maybe you could make it like an orange peel and bend it mostly sideways? Depends on how rigid it is. Or cut ridges like a fresnel lens? Or like lasik? All depends on the material properties.
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Re:First commercial curved CMOS sensor from startup CURVE by sudosysgen on Tuesday December 15, 2020 @07:25PM (#25437382)
Yes, I agree. What I mean is that by varying the thickness, you can get it very close to or exactly a sphere.
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