TC0401 is a Ag/Pd via fill (ratio Ag:Pd = 11.5:1) conductor which provides excellent compatibility with the Clad HL2000/CT800 system during the co-firing process. The paste is recommended as a transition paste for inner vias making a connection to Au paste TC8101. TC0401 is also compatible with Ag and Ag/Pd cofiring pastes, TC8401 and with various post firing pastes.