In situ polymerization of para-xylene for production of parylene F-like coating
View Patent ↗A method for depositing coating onto a substrate includes providing a monomer for creation of a protective coating on a substrate, energizing the monomer with a plasma generation system, and polymerizing the energized monomer onto the substrate in a plasma-enhanced chemical vapor deposition (PECVD) chamber.
1. A method for depositing coating onto a substrate, comprising:
providing a monomer for creation of a protective coating on a substrate, wherein the monomer comprises one of: 1,4-Bis(1-methoxyethyl)benzene; 1,4-bis(a-methoxyethyl) benzene; 2,5--dimethoxyethylbenzene; 1,4-Bis(1-mthoxypropyl)benzene; 1,4-Bis(1-methoxy--2—methylpropyl)benzene; 1,4-Bis(1-methoxybutyl)benzene; 1-(1-methoxyethyl)-4-(1-methoxybutyl)benzene; 1-(1-methoxymethyl); 4-(1-methoxy-2-methylpropyl)benzene; 1-(1-methoxyethyl)-4-(1-methoxy-2-methylpropyl)benzene; 1-(1-methoxymethyl)-4-(1-methoxy-1-phenylmethyl)benzene; 1-(1-methoxyethyl)-4-(1-methoxy-1-phenylmethyl)benzene; 1-(1-methoxy-2-methylpropyl)-4-(1-methoxy-1-phenylmethyl)benzene; 1-(1-methoxymethyl)-4-(1-methoxy-1-tolylmethyl)benzene or 1,4-Bis(1-methoxy-1-phenylmethyl)benzene;
energizing the monomer with a plasma generation system; and
polymerizing the energized monomer onto the substrate in a plasma-enhanced chemical vapor deposition (PECVD) chamber to form a coating, wherein the monomer is energized before entering the PECVD chamber, and
wherein the monomer polymerizes by step-growth polymerization.
2. The method of claim 1 , wherein the monomer is further energized within the PECVD chamber, and wherein the plasma generation system is coupled to the PECVD chamber with a precursor source of the monomer is positioned on a same side of the PECVD chamber as the plasma generation system such that the monomer flows by the plasma generation system.
3. The method of claim 1 , wherein the monomer is energized in a conduit that conducts the monomer from a precursor source to the PECVD chamber.
4. The method of claim 1 , further comprising bubbling argon through a saturation bottle to move the monomer into the PECVD chamber.
5. The method of claim 1 , wherein the plasma generation system is a capacitively coupled radio frequency (RF) plasma generation system coupled to the PECVD chamber.
6. The method of claim 1 , wherein the plasma generation system is a pulsed direct current (pulsed DC) plasma generation system coupled to the PECVD chamber.
7. The method of claim 1 , wherein the plasma generation system is remote from the PECVD.