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DirtyPCBs support / 4 layer board details
A few questions regarding the 4 layer PCB:
1) Are blind or buried vias allowed?
2) What are your preferred gerber layer names for the internal layers? The individual drill files if blind/buried vias are allowed? All layers are positive?
3) Data on the 4 layer dielectric? For example, oshpark uses FR408 from Isola and links a datasheet. Does your 4 layer house use that exact same material from the manufacturer? You can tell I am doing this for RF/microwave :) (up to 12GHz actually)
I'm more inclined towards Dirty because 1) no yucky purple color and 2) hopefully blind/buried vias are supported.
Thank you