Skip to Main content Skip to Navigation
Conference papers

Selective metallization of flexible substrates by inkjet printing with electroless copper plating

G Barral 1 N Hanifi 1 R. Faddoul 2 P. Viel 1 
1 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : A new efficient approach for selective metallization of flexible substrates such as poly(ethyleneterephtalate) (PET) sheets has been developed (Figure 1). The method is based on the covalent grafting of a chelating polymer film poly-4-vinylpyridine (P4VP) able to complex metallic palladium ions which then serve as catalyst for a copper electroless plating step. A solution of P4VP containing the palladium ions (II) catalyst is firstly inkjet printed to form a metallization primer. This primer is then photo-grafted onto the surface using a flashlamp. By a photo-oxidation process, light allows the formation of free radicals on the P4VP layer in contact with the substrate. Thus, covalent adhesion between the substrate and the P4VP is achieved. A selective copper layer is finally grown on the activated primer by a copper electroless plating process. The grafted primer layer enhances the copper adhesion. A resistivity-measured with four probes-as low as 2.1 µΩ.cm (sheet resistance equivalent to 84 mΩ/□ for 250 nm thickness) is obtained, which is only 20% higher than the one of bulk copper. This new low-temperature process only requires a plating bath and is thus compatible with low-cost thermally unstable flexible polymer substrates and R2R printing processes. The final metallic layer notably shows a very good adhesion on PET substrate and good stability in ambient atmosphere.
Document type :
Conference papers
Complete list of metadata

Cited literature [3 references]  Display  Hide  Download
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Thursday, October 31, 2019 - 4:33:22 PM
Last modification on : Friday, October 7, 2022 - 4:46:19 AM
Long-term archiving on: : Saturday, February 1, 2020 - 7:22:47 PM


Files produced by the author(s)


  • HAL Id : cea-02342006, version 1


G Barral, N Hanifi, R. Faddoul, P. Viel. Selective metallization of flexible substrates by inkjet printing with electroless copper plating. Materials 2017, Apr 2017, Aveiro, Portugal. ⟨cea-02342006⟩



Record views


Files downloads