Substrate relative permittivity

Hi

I would like to know if there are instruments/companies which produce any dielectric or substrate material with relative permittivity(dielectric constant) between 10 and 100 ? If yes, I would like to know if it's hard to do? and is it possible to create a substrate with a relative permittivity of for exemple, 16 or 66.2 precisely ?

Thank you

Some ceramic materials with permittivity in the 20 to 40 range. https://en.wikipedia.org/wiki/Cerami...mic_capacitors

thanks. do you know how it is possible to have a permittivity of 16? and is it possible to create inexpensively (for exemple less than 200S) some materials with any permittivity from 10 to 100?

Not inexpensively and not for less than S200. Ceramic in general is more expensive compared to softboard.

Do you know what would be approx. the cost of 500 g of substrate with er=16? Does er level influence the subsrate price? Can we make any er between 10 and 100 with ceramic or softboard?