# US 11,908,709 B2 · Container and method of preparing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,908,709 B2
- Document ID: US11908709B2
- Status: Granted
- Kind: B2
- Application number: 16/748,826
- Filed: 2020-01-22
- Published: 2020-08-20
- Granted: 2024-02-20
- Earliest claimed: 2019-01-30
- Assignees: Fujifilm Electronic Materials U.S.A., Inc.
- Applicants: FUJIFILM Electronic Materials U.S.A., Inc.
- Inventors: Marcia Cole-Yocom; Bryan Hinzie
- Web page: https://patentgrep.com/patent/US11908709B2

## CPC

- C11D 7/5004: {Organic solvents}
- H10P 72/0404: {for general liquid treatment, e.g. etching followed by cleaning}
- B08B 3/08: the liquid having chemical or dissolving effect
- B08B 9/08: Cleaning containers, e.g. tanks
- B65D 1/0215: {multilayered (B65D81/3837 takes precedence)}
- B65D 1/40: Details of walls (other container details B65D23/00, B65D25/00)
- B65D 1/42: Reinforcing or strengthening parts or members
- B65D 25/14: Linings or internal coatings (of containers made by folding or erecting blanks made of paper B65D5/56 {; linings for domestic water storage heaters F24H1/183})
- B65D 85/70: {for materials not otherwise provided for}
- B65D 23/02: Linings or internal coatings
- B65D 85/84: for corrosive chemicals
- C11D 2111/22: Electronic devices, e.g. PCBs or semiconductors
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A container for containing a raw material of a chemical liquid and a method of preparing a container are provided. The container at least includes an inner wall and solvent-treated surface of the inner wall. The method of preparing a container includes treating a surface of the inner wall with water and treating the surface the inner wall with an organic solvent.

## Claims

### Claim 1

A container for containing a raw material of a chemical liquid used for semiconductor manufacturing, the container comprising:
an inner wall, constructed with a stainless steel material or coated with a resin material; and
a solvent-treated surface of the inner wall, wherein the solvent-treated surface comes in contact with the raw material that includes a solvent having a content of iron (Fe) or calcium (Ca) atoms of 1 ppb or less and a content of organic impurities of 10 mass ppm or less during a course of being contained in the container,
wherein the solvent-treated surface comprises a water-treated surface, which is configured by treating a surface of the inner wall with only deionized water, or
wherein the solvent-treated surface comprises an organic solvent-treated surface, which is configured by treating a surface of the inner wall with only an organic solvent as the solvent included in the raw material, or
wherein the solvent-treated surface comprises a water-organic solvent-treated surface, which is configured by treating a surface of the inner wall with only deionized water, followed by treating the surface of the inner wall with only an organic solvent as the solvent included in the raw material.

### Claim 2 (depends on 1)

The container of claim 1, the stainless steel material used in constructing the inner wall has a 2B surface finish or higher.

### Claim 3 (depends on 2)

The container of claim 2, wherein the stainless steel material has an arithmetic average roughness Ra of about 0.5 μm or less.

### Claim 4 (depends on 1)

The container of claim 1, wherein the inner wall is coated with a phenolic resin lining material.

### Claim 5 (depends on 1)

The container of claim 1, wherein a material of the container includes stainless steel or carbon steel.

### Claim 6

A method of preparing a container for containing a raw material of a chemical liquid, the method comprising:
providing a container having an inner wall that is constructed with a stainless steel material or coated with a resin material;
treating a surface of the inner wall with only water; and
treating the surface of the inner wall with only an organic solvent, wherein the organic solvent includes a solvent included in the raw material.

### Claim 7 (depends on 6)

The method of claim 6, wherein the treating of the surface of the inner wall with only the water comprises:
dousing an interior of the container with only the water;
allowing the water to remain in the container for a first time period;
draining the water from the container; and
drying the container.

### Claim 8 (depends on 6)

The method of claim 6, wherein the treating of the surface of the inner wall with only the organic solvent comprises:
fully or partially filling the container with only the organic solvent;
agitating or sloshing the organic solvent in the container;
allowing the organic solvent to remain in the container for a second time period;
draining the organic solvent from the container; and
drying the container.

### Claim 9 (depends on 6)

The method of claim 6, wherein the treating of the surface of the inner wall with only the organic solvent is performed after the treating of the surface of the inner wall with only the water is completed.

### Claim 10 (depends on 9)

The method of claim 9, wherein the treating of the surface of the inner wall with only the water is performed at least once.

### Claim 11 (depends on 9)

The method of claim 9, wherein the treating of the surface of the inner wall with only the organic solvent is performed at least once.

### Claim 12 (depends on 9)

The method of claim 9, wherein a number of particles having a size of 40 nm or more is 100 or less per 1 ml of the organic solvent used in the treating of the surface of the inner wall.

### Claim 13 (depends on 6)

The method of claim 6, wherein the water used in treating the surface of the inner wall is deionized water having a resistivity up to 18 meg Ohms.

### Claim 14 (depends on 6)

The method of claim 6, wherein the organic solvent used in treating surface of the inner wall has a content of iron (Fe) or calcium (Ca) atoms of 1 ppb or less and a content of organic impurities of 10 mass ppm or less.

### Claim 15 (depends on 6)

The method of claim 6, wherein the stainless steel material used in constructing the inner wall has a 2B surface finish or higher, and an arithmetic average roughness Ra of about 0.5 μm or less.

### Claim 16 (depends on 6)

The method of claim 6, wherein the resin material used in coating the inner wall comprises a phenolic resin.

### Claim 17 (depends on 6)

The method of claim 6, wherein the container is constructed with stainless steel or carbon steel.

### Claim 18 (depends on 6)

The method of claim 6, wherein the organic solvent is select from the group consisting of methanol, ethanol, 1-propanol, isopropanol, monomethyl ether, propylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether acetate, ethyl lactate, methyl methoxypropionate, cyclopentanone, cyclohexanone, γ-butyrolactone, diisoamyl ether, butyl acetate, 4-methyl-2-pentanol, and a combination thereof.