Electrochemical additive manufacturing of articles

Patent metadata

Field	Value
Publication number	US-2021047745-A1
Application number	US-202016993843-A
Country	US
Kind code	A1
Filing date	Aug 14, 2020
Priority date	Aug 14, 2019
Publication date	Feb 18, 2021
Grant date	—

Abstract

Methods of additive manufacturing are described herein. In one aspect, a method of printing an article comprises (a) selectively depositing an initial layer of transition metal or transition metal oxide on a substrate, and (b) at least partially replacing the initial layer of transition metal or transition metal oxide with a noble metal layer via a galvanic replacement reaction. In step (c), an additional layer of transition metal or transition metal oxide is deposited on the noble metal layer, and in step (d), the additional layer of transition metal or transition metal oxide is at least partially replaced with an additional noble metal layer via a galvanic replacement reaction. Steps (c) and (d) are repeated until the article is completed. In some embodiments, the article is subsequently separated from the substrate and can be coupled to a secondary substrate.

First claim

1 . A method of printing an article comprising:
(a) selectively depositing an initial layer of transition metal or transition metal oxide on a substrate; (b) at least partially replacing the initial layer of the transition metal or transition metal oxide with a noble metal layer via a galvanic replacement reaction; (c) selectively depositing an additional layer of transition metal or transition metal oxide on the noble metal layer; (d) at least partially replacing the additional layer of the transition metal or transition metal oxide with an additional noble metal layer via a galvanic replacement reaction; and (e) repeating steps (c) and (d) until the article is completed.

2 . The method of claim 1 , wherein the initial layer of the transition metal or transition metal oxide and the additional layers of the transition metal or transition metal oxide are electrodeposited.

3 . The method of claim 2 , further comprising irradiating the initial layer of the transition metal or transition metal oxide and/or the additional layers of the transition metal or transition metal oxide in selected areas.

4 . The method of claim 3 , further comprising dissolving non-irradiated areas of the initial layer and non-irradiated areas of the additional layers of the transition metal or transition metal oxide.

5 . The method of claim 1 , wherein the initial layer and/or the additional layers of transition metal oxide comprise Cu 2 O.

6 . The method of claim 1 , wherein the initial layer and the additional layers of the transition metal or transition metal oxide are contacted with noble metal salt solution.

7 . The method of claim 1 , wherein noble metal of the noble metal layer and the additional noble metal layers are selected from Groups 8-11 of the Periodic Table.

8 . The method of claim 1 , wherein compositional identity varies between the additional noble metal layers.

9 . The method of claim 1 , wherein the article has structural features on the micron and/or nanometer scale.

10 . The method of claim 1 , wherein the noble metal layer and the additional noble metal layers have thickness of at least 50 nm.

11 . The method of claim 1 further comprising separating the article from the substrate.

12 . The method of claim 11 further comprising coupling the article to a secondary substrate.

13 . The method of claim 12 , wherein the secondary substrate comprises an electrically insulating material or polymeric material.

14 . The method of claim 1 , wherein the three dimensional article comprises one or more layers of transition metal or transition metal oxide between adjacent noble metal layers.

15 . The method of claim 1 , wherein the initial layer and the additional layers of the transition metal or transition metal oxide are selectively deposited according to digital design data of the article.

16 . A method of printing an article comprising:
(a) selectively depositing an initial layer of transition metal or transition metal oxide on a substrate; (b) at least partially replacing the initial layer with a metal layer via a galvanic replacement reaction; (c) selectively depositing an additional transition metal or transition metal oxide layer on the metal layer; (d) at least partially replacing the additional layer with an additional metal layer via a galvanic replacement reaction; and (e) repeating steps (c) and (d) until the article is completed.

17 . The method of claim 16 , wherein the initial layer and the additional layers of the transition metal or transition metal oxide are contacted with metal salt solution, the metal salt having standard electrode potential that is positive of the standard electrode potential for the layer of the transition metal or transition metal oxide.

18 . The method of claim 17 , wherein the initial layer and the addition layers comprise Cu 2 O.

19 . A method of metal layer deposition comprising;
(a) selectively depositing a layer of transition metal or transition metal oxide on a substrate; (b) contacting the layer of the transition metal or transition metal oxide and the substrate with a metal salt solution; (c) depositing a metal layer on the substrate from the metal salt solution; and (d) at least partially removing the layer of the transition metal or transition metal oxide to expose areas of the substrate not coated by the metal layer.

20 . The method of claim 19 , wherein the transition metal oxide of the selectively deposited layer comprises Cu 2 O.

Assignees

• Univ Arkansas

Inventors

• Coridan Robert H
• Lowe James M

Classifications

• C23C28/345

  with at least one oxide layer · CPC title

• C23C28/322

  only coatings of metal elements only · CPC title

• C23C18/54

  Contact plating, i.e. electroless electrochemical plating · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• C23C18/1642

  semiconductor (semiconductor H10P14/48) · CPC title