Patent ID: 7985188

Claim:
A syringe or syringe parts comprising: a barrel and a piston, the barrel having an inner surface and the piston having a side surface engaging the barrel inner surface, wherein at least one of the inner surface and the side surface is a substrate coated with a lubricity layer configured to provide a lower piston sliding force or breakout force than the uncoated substrate the lubricity layer having one of the following atomic ratios, measured by X-ray photoelectron spectroscopy (XPS), Si w O x C y or Si w N x C y , where w is 1, x in this formula is from about 0.5 to 2.4, and y is from about 0.6 to about 3; the lubricity layer having a thickness by transmission electron microscopy (TEM) between 10 and 500 nm; the lubricity layer deposited by plasma enhanced chemical vapor deposition (PECVD) under conditions effective to form a coating from a precursor selected from a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, a silatrane, a silquasilatrane, a silproatrane, an azasilatrane, an azasilquasiatrane, an azasilproatrane, or a combination of any two or more of these precursors.