[SI-LIST] Re: PCB thin dielectrics

I would like to thank everyone that responded, both on and off the list.

While thin dielectric for power planes have advantages, can it be used for 
signal layers? To maintain impedance, signal traces have to be reduced to 
impractical levels or permittivity must be increased. How common is this in 
practice, what are the tradeoffs?

Ivor

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