Dk for Prepregs R-5670(K)/ R-5670(N)/ R-5670(G)
They are available for 1035, 1078, 2013 and 2116 types.
DK for 1GHZ is as follows:
Type 1035--60um: 3.20; 68um: 3.16; 74um: 3.13;
Type 1078--77um: 3.26; 89um: 3.22; 104um: 3.17; 118um: 3.13;
Type 2013--98um: 3.40; 106um: 3.37;
Type:2116--125um: 3.40; 132um: 3.37.
But we need to know the different resin content. It is better to have the datasheet from Panasonic.