Silver-organo-complex ink with high conductivity and inkjet stability

Patent metadata

Field	Value
Publication number	US-11390768-B2
Application number	US-202016788932-A
Country	US
Kind code	B2
Filing date	Feb 12, 2020
Priority date	Dec 14, 2015
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

A robust formulation of silver-organo-complex (SOC) ink and method of making same are provided. In an aspect, the complexing molecules act as reducing agents. The silver loaded ink can be printed and sintered on a wide range of substrates with uniform surface morphology and excellent adhesion.

First claim

Therefore, the following is claimed:

1. A method of preparing a metal integrated 3D object comprising depositing a first layer of UV dielectric ink using a 3D inkjet printer and curing the first layer to form a 3D object;
depositing a second layer of UV dielectric ink over the first layer using an inkjet printer and curing the second layer to provide a smoothed surface to the 3D object;
depositing a first layer of silver-organo-complex (SOC) ink on at least a portion of the smoothed surface using an inkjet printer and curing the SOC ink layer, wherein the SOC ink comprises a silver cation complexed with a first complexing agent and a second complexing agent and a carboxylic acid or a salt of a carboxylic acid; and
depositing a third layer of UV dielectric ink over at least a portion of the first SOC ink layer using an inkjet printer and curing the third layer.

2. The method of claim 1 , wherein the first SOC ink layer is cured by IR heating.

3. The method of claim 2 , wherein IR heating is performed at a temperature of less than 80° C.

4. The method of claim 1 , wherein the second layer of UV dielectric ink is allowed to spread over the first layer of UV dielectric ink before curing.

5. The method of claim 1 , further comprising depositing an additional layer of SOC ink onto the third layer of UV dielectric ink and curing the additional SOC ink layer.

6. The method of claim 5 , wherein the additional layer of SOC ink contacts the first SOC ink layer.

7. The method of claim 1 , wherein the first complexing agent is an alkyl amine selected from the group consisting of methylamine, ethylamine, propylamine, butylamine, and amylamine.

8. The method of claim 1 , wherein said second complexing agent is an aminoalcohol selected from the group consisting of methanolamine, ethanolamine, propanolamine, and butanolamine.

9. The method of claim 1 , wherein the carboxylic acid is a short chain carboxylic acid having 1-3 carbon atoms.

10. The method of claim 1 , wherein the SOC ink further comprises 2-hydroxyethylcellulose.

11. The method of claim 1 , wherein the SOC ink has a pH of about 10.5.

12. The method of claim 1 , further comprising, before depositing the third UV dielectric ink layer, dipping the 3D object in perfluorodecanethiol.

13. The method of claim 1 , wherein the smoothed surface has a roughness value RMS of less than 500 nm.

14. A Radio Frequency (RF) Passive component made by the method of claim 1 .

15. The RF Passive component of claim 14 , selected from the group consisting of capacitors, filters, and inductors.

Assignees

• Univ King Abdullah Sci & Tech

Inventors

• Vaseem Mohammad
• Mckerricher Garret
• Shamim Atif

Classifications

• C09D11/52 Primary

  Electrically conductive inks · CPC title

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• H05K2201/10098

  Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas · CPC title

• H05K3/125

  by ink-jet printing · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title