Rinsing and drying for electrochemical processing

Patent metadata

Field	Value
Publication number	US-9574283-B2
Application number	US-201514948259-A
Country	US
Kind code	B2
Filing date	Nov 21, 2015
Priority date	Aug 19, 2010
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An electroplating/etch apparatus including a fluid jet and a dryer present over the tank containing the electrolyte for the electroplating/etch process. The fluid jet and the dryer remove excess liquids, such as electrolyte, from the component being plated or etched, e.g., working electrode. The working electrode is present on a holder that traverses from a first position within the tank during a plating or etch operation to a second position that is outside the containing the plating electrolyte. The fluid jet rinses the working electrode when the holder is in the second position, and the forced air dryer blows any remaining fluid from the fluid jet and the electrolyte from the working electrode into the tank.

First claim

What is claimed is:

1. A method of etching comprising:
providing a tank of an electrolyte;
providing an electrode system including a cathode present within the tank of the electrolyte and an anode that can be traversed from a first position within the tank containing the electrolyte to a second position in which the anode is removed from the tank, wherein the anode is mounted to a holder;
traversing the anode and a portion of said holder into the first position and applying a bias to the cathode and the anode to etch the anode;
traversing the anode and said holder into the second position and rinsing the anode with a fluid jet to dilute a remaining portion of electrolyte present on the anode; and
removing at least a portion of remaining fluid from the fluid jet and electrolyte that has been diluted from the anode while in the second position with a dryer to blow the portion of the remaining fluid and the electrolyte that has been diluted from the anode into the tank, wherein a liquid including drag out electrolyte is present on the anode in an amount ranging from about 5 ml to about 50 ml.

2. The method of claim 1 , wherein the fluid jet applies a fluid comprising H 2 O, boric acid solution, wetting agent, base electrolyte or a combination thereof.

3. The method of claim 1 wherein the rinsing the anode with the fluid jet comprises a time period ranging from 5 milli-seconds to 75 milli-seconds.

4. The method of claim 1 , wherein the dryer comprises at least one of an air knife, axial fan, propeller fan, centrifugal (radial) fans or cross flow fan.

5. The method of claim 1 , wherein the removing of the at least the portion of remaining fluid from the fluid jet and the electrolyte that has been diluted from the anode with the dryer comprises a time period ranging from 5 milli-seconds to 75 milli-seconds.

6. The method of claim 1 , wherein the holder comprises a non-conductive material.

7. The method of claim 6 , wherein the non-conductive material is selected from the group consisting of a polymeric material, a ceramic and glass.

8. The method of claim 1 , wherein the fluid jet is mounted to a stationary component of the holder.

9. The method of claim 1 , wherein the holder comprises a lip portion having a surface that extends over and in direct contact with the anode.

10. The method of claim 1 , wherein the holder comprises a mechanical armature.

11. The method of claim 1 , wherein the fluid jet contains one or more nozzles.

12. The method of claim 1 , wherein the fluid jet is separate from the tank or holder.

13. The method of claim 1 , wherein the anode comprises an electrically conductive material.

14. The method of claim 13 , wherein the anode is an elemental metal or an alloy thereof.

15. The method of claim 1 , wherein the anode is circular or multi-sided.

Assignees

• IBM

Inventors

• Arvin Charles L
• Bezama Raschid J
• Deligianni Hariklia

Classifications

• C25F7/00

  Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects (for both electrolytic coating and removal C25D); Servicing or operating · CPC title

• C25F3/02

  Etching · CPC title

• C25D21/08

  Rinsing · CPC title

• C25D5/48 Primary

  After-treatment of electroplated surfaces · CPC title

• C25D17/00 Primary

  Constructional parts, or assemblies thereof, of cells for electrolytic coating · CPC title