Clean room management rules and regulations

1. Introduction

1.1 Scope

All persons, machines, equipment, articles, raw materials, products, etc. entering the clean room are subject to the control scope of this specification.

1.2 Purpose

To maintain the cleanliness of the clean room, control the pollution sources and control the environmental parameters, the persons, machines, equipment, articles, raw materials, etc. in the clean room are controlled to ensure that the cleanliness of the clean room meets the requirements of the product process and improve the product quality.

2. Reference Document

U.S. federal standard 209D (U.S. FEDERAL STANDARD 209D) MS-5103 GUIDANCE FOR OPERATION OF CLEAN ROOM.

3. Definition

Except for the following terms, this specification is in accordance with JSZ8122 (Contamination Control Terminology). clean room particles are controlled within the specified value. Generally speaking, particles refer to solid or liquid substances with a particle size of 0.001 to 1000μm.

4. Clean room management standard procedures

4.1 Clean room cleanliness level classification and area definition

4.1.1 Front-end panel factory

Area	Class	Includes
Area A	Class 100	yellow light room and assembly room
Area B	Class 1000	Other front-end panel production areas except areas A and C
Area C	Class 10000	Film projection room

4.1.2 Back-end panel factory

Area	Class	Includes
Area D	Class 1000	Back-end panel clean room (liquid crystal injection room)
Area E	Class 1000	Back-end panel patch area (inside Clean Booth)
Area F	Class 10000	Back-end panel general area

4.1.3 Module workers

Zone	Class	Includes
G zone	Class 1000	Module dust-free rate (C0G room)
H zone	Class 1000	Module cleaning area (inside Clean Booth)
I zone	Class 10000	Module general area

4.2 Provisions for wearing and using dust-free clothes/shoes/hats

4.2.1 Classification of dust-free clothes

Type	Class	Colors & Usage
One-piece dust-free clothes	Class 100	White, apple green, blue, green, light yellow (blue for engineers, green for construction and uncertified personnel, light yellow for guests)
Shawl-style dust-free clothes	Class 1000	White, blue, light yellow (blue for engineers, light yellow for guests)
Coat-style anti-static robes	Class 10000	White, blue, light yellow (blue for engineers, light yellow for guests)

4.2.2 Classification of dust-free shoes

Type	Class	Colors & Usage
Long-type dust-free shoes	Class 100	White, apple green, blue, green, yellow (blue for engineers, green for construction and uncertified personnel, yellow for guests)
Open-hole electrostatic shoes	Class 10000	White (guests use non-woven shoe covers)

4.2.3 Classification of dust-free hats

Type	Class	Colors & Usage
One-piece dust-free hats	Class 100	White, apple green, blue, green, yellow (connected with dust-free clothes)
Shawl-type dust-free hats	Class 1000	White, blue, yellow, pink, light red, dark red (blue for engineers and technicians, yellow for guests, pink for QC, light red for material personnel in the manufacturing department, and dark red for team leaders in the manufacturing department)
Butterfly dust-free hat	Class 1000	White, blue, yellow, pink, light red, dark red (blue for engineers and technicians, yellow for guests, pink for QC, light red for material personnel in the manufacturing department, and dark red for team leaders in the manufacturing department)

4.2.4 Dust-free clothing wearing regulations for each area

4.2.5 Cleaning and changing regulations for clean clothes

Clean clothes must be cleaned regularly every two weeks, and are cleaned uniformly by outsourced professional laundry factories and sent back to the factory to maintain the cleanliness of clean clothes.

4.2.6 Damage and repair of cleanroom clothing

If cleanroom clothing is damaged, the zipper is damaged, the elastic band is loose, the magic sticky tape falls off, etc., the clothing should be stopped from use immediately. If it can be repaired, it should be placed in the repair area. If it cannot be repaired, it should be scrapped and a new one should be used.

4.3 Obtaining the qualification to enter the cleanroom

4.3.1 General employees

Those who often work in the cleanroom or enter the cleanroom from time to time should first take the "Cleanroom Management Standards" or other related courses by the manufacturing department, and pass the examination before they are qualified to enter and exit the cleanroom. Those who pass the examination will be registered and managed by the manufacturing department, and then they can receive cleanroom clothing and other related items from the manufacturing department.

4.3.2 Senior managers

After being familiar with and understanding the cleanroom management standards and other relevant regulations, they are qualified to enter and exit the cleanroom. (Senior manager definition: refers to the chairman, general manager, deputy general manager, etc.)

4.3.3 Guests (manufacturers)

The reception department should have the clean room entry and exit qualifications, and explain the various regulations and precautions in the clean room first, and then they can Enter the clean room accompanied by relevant personnel.

4.3.4 Clean room entry qualification acquisition process

4.4 Cancellation of clean room entry qualifications

If the following situations occur, the clean room entry qualification will be cancelled:

1. When the employee resigns or the leave of absence period exceeds 3 months.
2. The cumulative violation of the clean room management regulations or other relevant regulations within 1 month is registered by the quality control or audit personnel for 2 times (inclusive) or more.
3. Violation of the clean room management regulations or other relevant regulations is serious.
4. When the clean room management regulations or other relevant regulations are significantly modified and re-certification is required.

4.5 Clean Room Qualification Examination

• Pre-exam preparation: Before the exam, the Manufacturing Department shall give a unified lecture on clean room management regulations and other related regulations.
• Test papers: There are 4 test papers in total, A, B, C, and D. Each paper consists of 15 multiple-choice questions and 10 true-or-false questions, each worth 4 points, and the score is calculated without deduction.
• Exam time: 10 minutes.
• Passing score: 80 points.
• Re-examination regulations: Those who fail the first test can retake the test after attending the class. If they still fail, they will not be qualified to work in the clean room.

4.6 Clean room entry and exit control regulations

4.6.1 Personnel restrictions

1. Company employees: Those who must work in the clean room due to job requirements must first take the "Clean Room Management Regulations" and other clean room-related regulations courses and pass the examination before they can enter the clean room.
2. Non-employees: To maintain cleanliness requirements and avoid unnecessary interference with production operations to ensure product quality, except for specific circumstances, no one is allowed to visit the clean room.
3. Non-employees must be accompanied by the receptionist or relevant department personnel when entering the clean room.
4. Application procedure for guests: When a guest needs to enter the clean room, the receptionist or relevant department personnel should apply to the head of the manufacturing department and can enter only after approval.
5. Guests must swipe their card to enter the clean room.

4.6.2 Restrictions on items

1. All items that are not used for production or work are prohibited from being brought into the clean room.
2. Paper items (not clean paper) on the front of the panel are prohibited from being brought into the clean room. If they must be brought in, they must be sealed or covered with plastic.
3. The following items are prohibited from being brought into the clean room:
• Pencils, erasers, correction fluid (correction tape) and other stationery that are easy to generate dust or evaporate (only in A, B, C, D, G areas)
• Ordinary paper, cartons, ordinary notebooks, paper loose-leaf books, etc. (only in A, B, C areas)
• Wooden items that do not have polyethylene or other materials on the surface
• Iron items that have not been rust-proofed and are rusty
• Dirty or rusty items
• Styrofoam items (only in A, B, C, D, G areas)
• Other items that are easy to pollute the environment or produce particles
4. Before bringing items into the clean room, they must be wiped clean before they can be brought in.

4.7 Procedures for entering the clean room

1. Procedures for personnel to enter the clean room (CR)
2. Procedures for items to enter the clean room
3. Procedures for instruments and equipment to enter the clean room

4.8 Procedures for wearing clean clothes

1. Procedures for wearing one-piece clean clothes (the procedure for taking off clothes is the opposite)
2. Procedures for wearing shawl-style clean clothes (the procedure for taking off clothes is the opposite)
3. Procedures for wearing coat-style anti-static robes (the procedure for taking off clothes is the opposite)

4.9 Steps for wearing cleanroom clothing

4.9.1 Steps for wearing one-piece cleanroom clothing

4.9.2 Steps for wearing a shawl-style cleanroom clothing

4.9.3 Steps for wearing a coat-style anti-static clothing

4.10 Notes for wearing cleanroom clothing

Replacement frequency:

• Net cap: Once a week (replace immediately if dirty/damaged)
• Mask: Every 2 days (replace immediately if dirty/damaged; disposable masks every entry/exit)
• Gloves: Every entry/exit (replace immediately if dirty/damaged)
• Finger gloves: Every two hours (every half hour for patch stations)

4.11 Check the top of the clean clothes before wearing them

Before wearing the clean clothes and entering the air shower, you should check the following items in front of the mirror:

• Hair and net hat should not be exposed
• Mouth and nose should not be exposed
• Trousers should not be exposed (except for coat-style anti-static robes)
• Clean clothes and shoes should not be damaged or dirty
• Zippers, buttons, magic sticky tape, etc. should be pulled up and not loose
• The edge of the gloves should not be exposed
• Identification name tags should be fitted and fixed securely (except for new employees without tags)
• The brim of the shawl and hat should not be exposed

4.12 General prohibitions and precautions for clean rooms

4.13 Special attention to the yellow light room

1. No more than 5 people in the yellow light room
2. Must use air shower when entering
3. Be careful with light source to avoid affecting process
4. No interfering factors affecting temperature/humidity during production
5. Minimize walking around or entering/exiting

4.14 Things to note for guests (vendors) entering the clean room

Must apply for permission before entering and be accompanied by relevant personnel.

1. Guests must be accompanied throughout their activities
2. No photography or photo taking
3. Don't bring prohibited items
4. Must wear special clean clothes (yellow)
5. Long clean shoe covers for A/B areas; non-woven for C/D/E/F
6. No touching or operating machines without permission

4.15 Safety precautions for cleanrooms

4.16 Clean room environmental condition control

Summary

These comprehensive clean room management rules and regulations ensure the highest standards of cleanliness, safety, and operational efficiency. By following these guidelines meticulously, organizations can maintain optimal environmental conditions, prevent contamination, and ensure product quality in sensitive manufacturing environments.