Patent ID: 9688438
Date: 2017-06-27
CPC Classifications: B65D,C23C,Y10T

Claim:
1. A method for plasma treatment of a container made of a thermoplastic material, the method comprising: inserting the container into a plasma chamber; and depositing a coating on the container following plasma ignition using a vacuum deposition technique; wherein the plasma is ignited by microwave energy, wherein the coating comprises a gas barrier layer and a bonding layer arranged between the container and the gas barrier layer, wherein the gas barrier layer contains SiO wherein the bonding layer contains carbon, wherein the gas barrier layer is produced from a mixture of process gases that comprises at least one silicon-containing gas and argon gas, wherein the silicon-containing gas is present in an amount from 0.5 to 1.5 mole percent of the mixture of process gases, wherein argon is present in an amount of 40±4 mole percent of the mixture of process gases, wherein oxygen is present in an amount from 39 to 89 mole percent of the mixture of process gases, and wherein the silicon-containing process gas is HMDSN.