Patent ID: 8883641

Claim:
Solution for activating the oxidized surface of a substrate, in particular a silicon-containing substrate, for its subsequent coating by a metal layer deposited using an electroless method, characterized in that it contains: A) an activator consisting of one or more palladium complexes selected from the group consisting of: palladium complexes having the formula (I) wherein: R1 and R2 are identical and are —H; —CH 2 CH 2 NH 2 ; —CH 2 CH 2 OH; or R1 is H and R2 is —CH 2 CH 2 NH 2 ; or R1 is —CH 2 CH 2 NH 2 and R2 is —CH 2 CH 2 NHCH 2 CH 2 NH 2 ; or R1 is —H and R2 is —CH 2 CH 2 NHCH 2 CH 2 NHCH 2 CH 2 NH 2 ; X is a ligand selected from the group consisting of Cl − ; Br − ; I − ; H 2 O, NO 3 − ; CH 3 SO 3 − ; CF 3 SO 3 − ; CH 3 -Ph-SO 3 − ; CH 3 COO − palladium complexes having the formula IIa or IIb wherein: R1 and R2 are as defined above and Y is a counter-ion comprising two negative charges consisting of: either two monoanions, preferably selected from the group consisting of Cl − ; PF 6 − ; BF 4 − ; NO 3 − ; CH 3 SO 3 − ; CF 3 SO 3 − ; CH 3 C 6 H 4 SO 3 − ; CH 3 COO − ; or a dianion, preferably SO 4 2− ; B) a bifunctional organic binder consisting of one or more organosilane compounds having the general formula: {X-(L)} 4-n -Si(OR) n (Va) wherein: X is a functional group selected from the group consisting of thiol, pyridyle, epoxy (oxacyclopropanyle), glycidyle, primary amine, chlorine and being able to react with palladium compounds of formula 1; L is a spacer selected from the group consisting of CH 2 ; CH 2 CH 2 ; CH 2 CH 2 CH 2 ; CH 2 CH 2 CH 2 CH 2 ; CH 2 CH 2 NHCH 2 CH 2 ; CH 2 CH 2 CH 2 NHCH 2 CH 2 ; CH 2 CH 2 CH 2 NHCH 2 CH 2 NHCH 2 CH 2 ; CH 2 CH 2 CH 2 NHCH 2 CH 2 CH 2 CH 2 CH 2 CH 2 ; Ph; Ph-CH 2 ; et CH 2 CH 2 -Ph-CH 2 ; (Ph representing a phenyl moiety); R is a group selected from the group consisting of CH 3 —, CH 3 CH 2 —, CH 3 CH 2 CH 2 —, (CH 3 ) 2 CH—; and n is an integer equal to 1, 2 or 3; or the general formula: (OR) 3 Si-(L)-Si(OR) 3 (Vb) wherein: L is a spacer selected from the group consisting of CH 2 CH 2 CH 2 NHCH 2 CH 2 NHCH 2 CH 2 CH 2 and CH 2 CH 2 CH 2 —S—S—CH 2 CH 2 CH 2 ; R is a group selected from the group consisting of CH 3 —, CH 3 CH 2 —, CH 3 CH 2 CH 2 —, (CH 3 ) 2 CH—; C) a solvent system consisting of one or more solvents suitable for solubilizing said activator and said binder.