Can you recommend a single crystal ceramic substrates (e.g. STO) vendors?

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Lior Kornblum

Thanks for your input.

We had some timing issues with CrysTec; their crystal quality is indeed excellent.

Kiril A Pandelisev

Can you comment on the crystal size? And, what is "smooth surface" for you?

Kiril, I'm interested in standard 5x5x0,5mm.

By smooth surface I mean observing atomic steps in the AFM