Patent ID: 11912883
Assignee: ORELTECH LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC C  B  H | IPC B  C  H

Claim 0:
1. A method for forming a patterned metal film on a polyethylene terephthalate (PET) substrate, comprising:
treating the PET substrate with an Oxygen plasma with exposure parameters comprising RF frequency of 13 MHz, power of 50 W, and Oxygen flow rate of 5 sccm, wherein the plasma is applied in a vacuum chamber with a low pressure of 375 Torr through a polymer mask with a first void area of 2×2 mm to create a hydrophilic pattern;
applying an ink composition on a surface of the substrate, wherein the ink composition is a solution that includes metal cations of AgNO3 in the a concentration of 40 wt. % in water; wherein the ink composition is applied at a predefined pattern; and
exposing at least the applied ink composition on the substrate to a low-energy plasma, wherein the low-energy plasma is a low-pressure plasma operated according to a first set of exposure parameters; wherein the substrate is placed in the vacuum chamber;
and wherein the plasma is Argon plasma and the chamber is set with the exposure parameters comprising RF frequency of 13 MHz, power of 50 W, and Argon flow rate of 3 sccm, wherein the plasma is applied in the vacuum chamber with a low pressure of 375 Torr; thereby forming a thin metal film having a thickness of 500 nm on top of the PET substrate without any substrate deformation.