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PCB substrate with dielectric constant 30; fact or fiction?

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I've been told that there are ceramic based PCB substrates with dielectric constant as high as 30+. I've tried searching for such material without success. Does anybody know if such a substrate exists commercially?
 

Re: PCB substrate with dielectric constant 30; fact or ficti

I used one once that was low loss and stable around 50. I think you can get up to the thousands, but they are not very temperature stable up there.
 

Re: PCB substrate with dielectric constant 30; fact or ficti

I've been told that there are ceramic based PCB substrates with dielectric constant as high as 30+. I've tried searching for such material without success. Does anybody know if such a substrate exists commercially?
Click to expand...

Do you mean ceramic loaded PCB such as TMM10 or hard substrates for thin films?

Here is the latter:

**broken link removed**

**broken link removed**
 

Re: PCB substrate with dielectric constant 30; fact or ficti

The DLI article does indeed list substrates with very high dielectric constant. But what are CD, CG, and NR type substrates?
 

Re: PCB substrate with dielectric constant 30; fact or ficti

Perfect, thank you so much.
 

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