Etching chelating agent, manufacturing method thereof, and etching solution composition

Patent metadata

Field	Value
Publication number	US-11674229-B2
Application number	US-202016954218-A
Country	US
Kind code	B2
Filing date	May 7, 2020
Priority date	Mar 23, 2020
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

The invention discloses an etching chelating agent, a manufacturing method thereof, and an etching solution composition. The etching chelating agent includes cellulose cross-linked polymer, and the cellulose cross-linked polymer is obtained by cross-linking and polymerizing carboxymethyl cellulose and an amine compound.

First claim

What is claimed is:

1. An etching chelating agent, comprising a cellulose cross-linked polymer, wherein the cellulose cross-linked polymer is obtained by cross-linking and polymerizing carboxymethyl cellulose and an amine compounds;
wherein the amine compound comprises an epoxy group.

2. The etching chelating agent according to claim 1 , wherein the etching chelating agent further comprises porous polystyrene, and the cellulose cross-linked polymer and the porous polystyrene are uniformly bonded to each other.

3. The etching chelating agent according to claim 2 , wherein a mass ratio of the cellulose cross-linked polymer to the porous polystyrene is between 5:1 and 3:1.

4. A manufacturing method of an etching chelating agent, comprising:
mixing carboxymethyl cellulose with an amine compound and subjecting the carboxymethyl cellulose and the amine compound to a reaction at a first temperature for a first period to obtain a cellulose cross-linked polymer; and
adding the cellulose cross-linked polymer, porous polystyrene, a surfactant, and a dispersant to deionized water to form a solution, evenly stirring the solution, and then drying the solution to remove the deionized water to form the etching chelating agent.

5. The method of manufacturing the etching chelating agent according to claim 4 , wherein a molar ratio of the carboxymethyl cellulose to the amine compound is between 5:1 and 1:1.

6. The method of manufacturing the etching chelating agent according to claim 4 , wherein the first temperature is between 80° C. and 150° C., and the first period is between 15 minutes and 60 minutes.

7. The method of manufacturing the etching chelating agent according to claim 4 , wherein a mass ratio of the cellulose cross-linked polymer to the porous polystyrene is between 5:1 and 3:1.

8. The method of manufacturing the etching chelating agent according to claim 4 , wherein the surfactant is polyethylene glycol.

9. The method of manufacturing the etching chelating agent according to claim 4 , wherein the dispersant is selected from at least one of amide compounds.

10. The method of manufacturing the etching chelating agent according to claim 4 , wherein the amine compound comprises an epoxy group.

11. An etching solution composition, comprising:
hydrogen peroxide, an organic acid, an inorganic acid, an etching additive, and an etching chelating agent, wherein the etching chelating agent is a mixture comprising a cellulose cross-linked polymer and porous polystyrene, and the cellulose cross-linked polymer is obtained by cross-linking and polymerizing carboxymethyl cellulose and an amine compound.

12. The etching solution composition according to claim 11 , wherein a mass ratio of the etching chelating agent in the etching solution composition is between 0.5 wt % and 15 wt %.

13. The etching solution composition according to claim 11 , wherein a mass ratio of the cellulose cross-linked polymer to the porous polystyrene is between 5:1 and 3:1.

Assignees

• Shenzhen China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Wu Haoxu

Classifications

• C08L1/286 Primary

  substituted with acid radicals, e.g. carboxymethyl cellulose [CMC] (C08L1/282 takes precedence) · CPC title

• C23F1/34

  for etching copper or alloys thereof · CPC title

• C08L25/06

  Polystyrene · CPC title

• C08B11/12

  substituted with carboxylic radicals {, e.g. carboxymethylcellulose [CMC]} · CPC title

• C23F1/18 Primary

  for etching copper or alloys thereof · CPC title