A method of surface treating a fluid dispenser device, the method including a step of modifying at least one surface to be treated of at least a portion of the device by ionic implantation using multi-charged and multi-energy ion beams. The modified surface to be treated has anti-friction properties, the multi-charged ions are selected from helium (He), nitrogen (N), oxygen (O), neon (Ne), argon (Ar), krypton (Kr), and xenon (Xe), and ionic implantation is carried out to a depth of 0 mum to 3 mum.