Study of palladium catalyzation for electroless copper plating on polyimide film.

In order to form flexible printed circuits through inkjet printing technique, the Pd(ll) catalyst ink was printed on the surface of polyimide film modified with KOH solution and then reduced with NaBH4 solution to extract the Pd(O) catalyst nuclei. The concentration of the Pd(ll) catalyst ink and reduction time showed a significant influence on the microstructure of the Pd(O) catalyst nuclei and the formation of Cu patterns through electroless plating. When reduction time exceeded 1 minute, and as the concentration of the Pd(II) catalyst ink increased above 0.02 M, the catalyst nuclei began aggregation, resulting in Cu patterns with thick and more defects.

Influence of surface modification of polyethylene terephthalate film on inkjet printing of Pd(II) catalytic ink.

To form the Cu circuit with electroless plating method on polyethylene terephthalate (PET) film, the Pd catalyst layer was formed by printing and liquid phase reduction of the Pd(II) ink on surface modified polyethylene terephthalate (PET) film. The Pd(II) ink could be obtained by hydrolysis of PdCl2 and NH4Cl solution and added with a stabilizing agent. To investigate the optimal printing characteristics by surface modification, the PET film was immersed into the KOH solution. The contact angle on surface of PET film greatly depended on the temperature and the concentration of the KOH solution. The printing of Pd(II) ink and Cu electroless plating characteristics were most excellent when the surface modification was carried out for 60 min at 60 degrees C in the 5-10 M KOH solution.

Bis(2-amino-1,3-thia-zole-κN)diazido-zinc.

In the title complex, [Zn(N(3))(2)(C(3)H(4)N(2)S)(2)], the Zn(II) atom is tetra-hedrally coordinated by two terminal azide ligands and by the ring N atoms of two different 2-amino-thia-zole ligands. Intra-molecular N-H⋯N hydrogen bonds between the amino groups of both 2-amino-thia-zole ligands and the N atom of one of the azide ligands ensure that the heterocyclic rings are oriented in the same direction. Inter-molecular N-H⋯N hydrogen bonds link the mol-ecules into zigzag sheets in the ac plane.

Bis(2-amino-benzothia-zole-κN)bis-(thio-cyanato-κN)zinc(II).

The Zn(II) ion in the title complex, [Zn(NCS)(2)(C(7)H(6)N(2)S)(2)], is tetra-hedrally coordinated within an N(4) donor set defined by two N atoms of two terminal isothio-cyanate ligands and by two heterocyclic N atoms of two different 2-amino-benzothia-zole ligands. This arrangement is stabilized by intra-molecular N-H⋯N hydrogen bonds. In the crystal structure, mol-ecules are linked through N-H⋯S hydrogen bonds to form a two-dimensional array.