# US 2021/0277536 A1 · Hand-held cathode structure and electrolytic-polishing apparatus including the same

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- Number: US 2021/0277536 A1
- Document ID: US20210277536A1
- Status: Published application
- Kind: A1
- Application number: 17/089,620
- Filed: 2020-11-04
- Published: 2021-09-09
- Earliest claimed: 2020-03-09
- Assignees: Jae Sang HWANG
- Inventors: Jae Sang HWANG; Wan Seob SONG
- Web page: https://patentgrep.com/patent/US20210277536A1

## CPC

- C25F 7/00: Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects (for both electrolytic coating and removal C25D); Servicing or operating
- B23H 3/04: Electrodes specially adapted therefor or their manufacture (B23H9/00 takes precedence)
- C25F 3/16: Polishing
- C25F: PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- B23H: WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL (processes for the electrolytic or electrophoretic production of coatings, electroforming, or apparatus therefor C25D; processes for the electrolytic removal of material from objects C25F; manufacturing printed circuits using precipitation techniques to apply the conductive material to form the desired conductive pattern H05K3/18)

## Abstract

The embodiment relates to a hand-held cathode structure and an electrolytic polishing apparatus including the same. The hand-held cathode structure according to the embodiment has a cathode plate structure that is disposed adjacent to an electrolytic polishing target material for an electrolytic polishing, a cathode plate movable with respect to the electrolytic polishing target material, and an insulating fiber coating layer capable of absorbing the electrolyte disposed between the electrolytic polishing target material and the cathode plate.

## Claims

### Claim 1

A hand-held cathode structure which is disposed adjacent to an electrolytic polishing target material for electrolytic polishing, the hand-held cathode structure comprising:
a cathode plate movable with respect to the electrolytic polishing target material; and
an insulating fiber film layer disposed between the electrolytic polishing target material and the cathode plate and capable of absorbing an electrolyte.

### Claim 2 (depends on 1)

The hand-held cathode structure of claim 1, wherein the insulating fiber coating layer comprises a first insulating fiber coating layer disposed between the electrolytic polishing target material and the cathode plate, a second insulating fiber coating layer surrounding a side surface of the cathode plate, and a third insulating fiber coating layer surrounding an upper side of the cathode plate.

### Claim 3 (depends on 1)

The hand-held cathode structure of claim 1, wherein the cathode plate includes a vertical perforation penetrating upper and lower sides.

### Claim 4 (depends on 3)

The hand-held cathode structure of claim 3, wherein a second diameter of the upper side of the vertical perforation is larger than a first diameter of the lower side of the vertical perforation.

### Claim 5 (depends on 3)

The hand-held cathode structure of claim 3, wherein the hand-held cathode structure further comprises a horizontal perforation connected to the vertical perforation and extending in a horizontal direction to pass therethrough.

### Claim 6 (depends on 1)

The hand-held cathode structure of claim 1, wherein the insulating fiber coating layer includes a predetermined recess and in which an electrolyte nozzle is fixed to the predetermined recess.

### Claim 7 (depends on 1)

The hand-held cathode structure of claim 1, wherein the cathode plate comprises a curved shape.

### Claim 8 (depends on 1)

An electrolytic polishing apparatus comprising the hand-held cathode structure according to claim 1.

### Claim 9 (depends on 2)

An electrolytic polishing apparatus comprising the hand-held cathode structure according to claim 2.