We are a University Science and Technology Research Group, and are looking for a SOQ (Silicon on quartz) wafer that can realise Si structures etched on both sides of SiO2, where the thickness of the quartz layer is 1.5mm and the thickness of the Si layer is 1μm, are there any such wafers and if not can they be customised.
We don't have specific requirements for the size of the wafers, the specification is 1mm thick quartz layer with 1μm thick amorphous or monocrystalline silicon on both its front and back sides. Before giving the specific quantity, we would like to first determine whether this SOQ wafer can be customised, because the quartz layer is thicker while the device layers on both sides are thinner. Then we would like to know the lead time for this customised wafers.
What we are actually doing is related to metasurfaces. For hypersurfaces, the height of the dielectric column is a very important parameter, because for a fixed refractive index of the dielectric, it is necessary to have an appropriate height to cover the entire 2π phase distribution, which can be used in the design of the metasurface to achieve the modulation of the light, that is why I mentioned in the previous email that I want the thickness of the single crystal silicon or amorphous silicon layer to be at 1μm, and this is the height of the unit that we have set in the design. And I need to modify the thickness of the quartz layer that I mentioned before, it needs to be 1.5mm. I know this kind of wafer is not very common, so I wonder if I can ask you to confirm whether this kind of wafer can be customised and prepared individually. If so, I would also like to know the required delivery time and price, and if it is difficult to realize, I hope you can let me know.