Formation of a high hydrophilic/hydrophobic contrast surface on PET substrates by ECR generated sulfur hexafluoride plasma

▶ High hydrophilic/hydrophobic contrast surfaces on PET substrates. ▶ This was accomplished using a mask and by controlling the distance of the mask to the substrate in SF6 plasma. ▶ The best contract in water contact angle obtained from the treated PET samples was larger than 100°.