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

Claim 5:
6. A method for forming a patterned metal film on a silicon substrate, comprising:
Treating the silicon substrate with an Oxygen plasma with an 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 HAuCl4 in a concentration of 10 wt. % in water and ethanol at a ratio of 90:10 wt. % (water: ethanol); 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 100 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 150 nm on top of the silicon substrate without any substrate deformation.