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How much do you know about the purification details of the clean room!

How much do you know about the purification details of the clean room!

2022-11-14
Latest company news about How much do you know about the purification details of the clean room!

How much do you know about the purification details of the clean room!

 

According to international practice, the dust-free purification level is mainly specified according to the number of particles in the air whose diameter is larger than the classification standard per cubic meter. That is to say, the so-called dust-free is not 100% without a little dust, but controlled in a very small amount of units. Of course, the particles that meet the dust standard in this standard are very small compared to our common dust, but for optical structures, even a little dust will have a very large negative impact, so in the production of optical structure products , dust-free is an inevitable requirement.

The number of particles with a particle size of less than 0.5 microns is controlled to less than 3,500 per cubic meter, which has reached the international dust-free standard A level. The dust-free standards currently used in chip-level production and processing have higher requirements for dust than Class A, and such high standards are mainly used in the production of some higher-level chips. The number of fine dust is strictly controlled within 1000 per cubic meter, which is commonly known as the 1K level in the industry.

 

The following are the purification parameters that the clean room needs to know:

1. Compartment, ceiling material, ceiling height;

2. Floor material;

3. Whether it is constant temperature and humidity;

4. Whether exhaust air is required;

5. The total number of people in the workshop;

6. The calorific value of the workshop process equipment;

 

And so on a series of parameters.

 

The standards for a class 100,000 clean room are:

 

Maximum allowable amount of dust (per cubic meter);

 

The number of particles greater than or equal to 0.5 microns shall not exceed 3,500,000, and the number of particles greater than or equal to 5 microns shall not exceed 20,000;

 

Maximum allowable number of microorganisms;

 

The number of bacteria shall not exceed 500 per cubic meter;

 

The number of settled bacteria should not exceed 10 per petri dish.

 

Pressure difference: The pressure difference between clean rooms of the same cleanliness level should be consistent. The pressure difference between adjacent clean rooms of different cleanliness levels should be ≥5Pa, and the pressure difference between clean rooms and non-clean rooms should be ≥10Pa.

 

When the 100,000-level dust-free workshop has no special requirements for temperature and humidity, it is appropriate to wear clean work clothes without feeling comfortable. The temperature is generally controlled at 20~22℃ in winter; 24~26℃ in summer; fluctuation ±2℃. The humidity of the clean room in winter is controlled at 30-50%, and the humidity in the clean room in summer is controlled at 50-70%.

 

Power distribution:

The general illuminance value of the main production room in the dust-free workshop (area) should be ≥300Lx; the illuminance value of the auxiliary studio, personnel purification and material purification room, airlock room, corridor, etc. should be 200~300Lx.

noise control

1. During the dynamic test, the noise level in the 10,000-class clean room should not exceed 70 dBA.

2. During the static test, the noise level of the 10,000-level turbulent clean room should not be greater than 60 dBA.

airflow organization

The main air supply method used in the 100,000-level dust-free workshop;

1. Partial orifice ceiling air supply;

2. High-efficiency air filter with diffuser plate for ceiling air supply;

3. Three types of air supply, including air supply on the upper side wall.

 

The main return air method used in the 100,000-level dust-free workshop

1. Arrange the return air outlet at the lower part of the single side wall; 2. When using the corridor return air, arrange the return air outlet evenly in the corridor or centrally set the return air outlet at the end of the corridor.

 

Air outlet velocity m/s:

 

1. Orifice 3~5 of the orifice plate,

 

2. Side air outlet:

 

(1) Attach jets 2 to 5,

 

(2) For non-attached jets, the return air at the lower part of the same side wall is 1.5~2.5, and the return air at the lower part of the opposite side wall is 1.0~1.5.

 

Return air velocity (m/s):

 

1. The return air outlet of the clean room is not more than 2,

 

2. The return air outlet in the corridor is not more than 4.

 

Standard operating procedures for personnel entering and leaving the 100,000-level dust-free workshop

 

1. Purpose

 

Establish standard operating procedures for personnel entering and exiting the 100,000-level clean room to ensure that the clean room is not polluted by personnel.

 

2. area

 

The entry and exit of the 100,000-level dust-free workshop personnel, including production operators, maintenance personnel and management personnel.

 

3 Responsibilities

 

3.1 All personnel entering and leaving the 100,000-level dust-free workshop shall be responsible for this operating procedure.

 

3.2 The team leader of the dust-free workshop and the on-site quality control personnel are responsible for supervision and inspection.

 

4 Content

 

4.1 Enter the door of the clean room and put down your rain gear and items in the specified position.

 

4.2 Change slippers. At the shoe changing place, sit on the shoe stool, take off your home shoes, put them in the shoe cabinet, rotate 180 degrees, take out your own slippers on the upper layer of the shoe cabinet and put them on.

 

4.3 Change of work clothes. Enter the general work area office, take off employee casual clothes, and change into work clothes.

 

4.4 Wash your hands. Follow the hand washing procedure to wash your hands.

 

4.5 Change to work shoes. Enter the door of the shoe room, sit on the bench, face the door, take off the slippers, put the slippers into the lower layer of the shoe cabinet, take out your work shoes from the upper layer of the shoe cabinet, sit and rotate 180 degrees with your back to the door and put them on.

 

4.6 Wash hands and dry.

 

4.6.1 Wet your hands with water to 10cm above your wrist in the sink, wash with detergent, make the skin of 10cm on your hands and wrists full of foam, and rub for about 15 seconds.

 

4.6.2 Rinse your hands with water, rinse the soaked rice on your hands, turn your hands up and down, and rub them until they don't feel greasy.

 

4.6.3 Visually check that hands are clean.

 

4.6.4 Extend your palm to 8~10cm below the dryer hand, and dry your hand until it is dry.

 

4.7 Change to clean underwear. Take off the work clothes and put them in the personal locker. Take off the work cap, work clothes and work pants with the personal number from the wall hook in a locker room and put them on. Put it on in order from top to bottom, that is: first put on the hat, mask, then top, and then pants. Pay attention to tie all the tops in the trouser pockets, tuck all the hair into the caps, and check whether the coats and caps are neat.

 

4.8 Wash hands and disinfect.

 

4.8.1 Wet your hands with water to 10cm above your wrist in the sink, wash with detergent, make the skin of 10cm on your hands and wrists full of foam, and rub for about 15 seconds.

 

4.8.2 Rinse your hands with water, rinse the soaked rice on your hands, turn your hands up and down, and rub them until they don't feel greasy.

 

4.8.3 Visually check that hands are clean.

 

4.8.4 Disinfection. Soak hands to 10cm above wrist in chlorine-containing disinfectant for 30 seconds.

 

4.8.5 Extend your palm to 8~10cm below the dryer hand, and dry your hand until it is dry.

 

4.9 Wear coveralls. Remove the one site with the Individual Number from the closet. Wear them from bottom to top, being careful not to let the coveralls touch the ground.

 

4.10 Receipt and disinfection. Push the door into the buffer room, put your hands under the automatic induction sprayer filled with 75% ethanol, spray for disinfection, shake your hands, and let the ethanol dry.

 

4.11 Enter the clean room. Open the buffer chamber door and enter the dust-free area.

 

4.12 When personnel leave the clean area, follow the reverse procedure for entering the clean area. Note that when dragging work clothes, undress from bottom to top.

 

4.13 Visitors from outside must be approved by the factory, and under the guidance and supervision of the workshop management personnel, enter and leave the dust-free workshop according to the prescribed procedures. Foreign visitors must strictly abide by the management regulations of the workshop. During the production period of the clean room, outside visitors are not allowed to enter.

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NEWS DETAILS
How much do you know about the purification details of the clean room!
2022-11-14
Latest company news about How much do you know about the purification details of the clean room!

How much do you know about the purification details of the clean room!

 

According to international practice, the dust-free purification level is mainly specified according to the number of particles in the air whose diameter is larger than the classification standard per cubic meter. That is to say, the so-called dust-free is not 100% without a little dust, but controlled in a very small amount of units. Of course, the particles that meet the dust standard in this standard are very small compared to our common dust, but for optical structures, even a little dust will have a very large negative impact, so in the production of optical structure products , dust-free is an inevitable requirement.

The number of particles with a particle size of less than 0.5 microns is controlled to less than 3,500 per cubic meter, which has reached the international dust-free standard A level. The dust-free standards currently used in chip-level production and processing have higher requirements for dust than Class A, and such high standards are mainly used in the production of some higher-level chips. The number of fine dust is strictly controlled within 1000 per cubic meter, which is commonly known as the 1K level in the industry.

 

The following are the purification parameters that the clean room needs to know:

1. Compartment, ceiling material, ceiling height;

2. Floor material;

3. Whether it is constant temperature and humidity;

4. Whether exhaust air is required;

5. The total number of people in the workshop;

6. The calorific value of the workshop process equipment;

 

And so on a series of parameters.

 

The standards for a class 100,000 clean room are:

 

Maximum allowable amount of dust (per cubic meter);

 

The number of particles greater than or equal to 0.5 microns shall not exceed 3,500,000, and the number of particles greater than or equal to 5 microns shall not exceed 20,000;

 

Maximum allowable number of microorganisms;

 

The number of bacteria shall not exceed 500 per cubic meter;

 

The number of settled bacteria should not exceed 10 per petri dish.

 

Pressure difference: The pressure difference between clean rooms of the same cleanliness level should be consistent. The pressure difference between adjacent clean rooms of different cleanliness levels should be ≥5Pa, and the pressure difference between clean rooms and non-clean rooms should be ≥10Pa.

 

When the 100,000-level dust-free workshop has no special requirements for temperature and humidity, it is appropriate to wear clean work clothes without feeling comfortable. The temperature is generally controlled at 20~22℃ in winter; 24~26℃ in summer; fluctuation ±2℃. The humidity of the clean room in winter is controlled at 30-50%, and the humidity in the clean room in summer is controlled at 50-70%.

 

Power distribution:

The general illuminance value of the main production room in the dust-free workshop (area) should be ≥300Lx; the illuminance value of the auxiliary studio, personnel purification and material purification room, airlock room, corridor, etc. should be 200~300Lx.

noise control

1. During the dynamic test, the noise level in the 10,000-class clean room should not exceed 70 dBA.

2. During the static test, the noise level of the 10,000-level turbulent clean room should not be greater than 60 dBA.

airflow organization

The main air supply method used in the 100,000-level dust-free workshop;

1. Partial orifice ceiling air supply;

2. High-efficiency air filter with diffuser plate for ceiling air supply;

3. Three types of air supply, including air supply on the upper side wall.

 

The main return air method used in the 100,000-level dust-free workshop

1. Arrange the return air outlet at the lower part of the single side wall; 2. When using the corridor return air, arrange the return air outlet evenly in the corridor or centrally set the return air outlet at the end of the corridor.

 

Air outlet velocity m/s:

 

1. Orifice 3~5 of the orifice plate,

 

2. Side air outlet:

 

(1) Attach jets 2 to 5,

 

(2) For non-attached jets, the return air at the lower part of the same side wall is 1.5~2.5, and the return air at the lower part of the opposite side wall is 1.0~1.5.

 

Return air velocity (m/s):

 

1. The return air outlet of the clean room is not more than 2,

 

2. The return air outlet in the corridor is not more than 4.

 

Standard operating procedures for personnel entering and leaving the 100,000-level dust-free workshop

 

1. Purpose

 

Establish standard operating procedures for personnel entering and exiting the 100,000-level clean room to ensure that the clean room is not polluted by personnel.

 

2. area

 

The entry and exit of the 100,000-level dust-free workshop personnel, including production operators, maintenance personnel and management personnel.

 

3 Responsibilities

 

3.1 All personnel entering and leaving the 100,000-level dust-free workshop shall be responsible for this operating procedure.

 

3.2 The team leader of the dust-free workshop and the on-site quality control personnel are responsible for supervision and inspection.

 

4 Content

 

4.1 Enter the door of the clean room and put down your rain gear and items in the specified position.

 

4.2 Change slippers. At the shoe changing place, sit on the shoe stool, take off your home shoes, put them in the shoe cabinet, rotate 180 degrees, take out your own slippers on the upper layer of the shoe cabinet and put them on.

 

4.3 Change of work clothes. Enter the general work area office, take off employee casual clothes, and change into work clothes.

 

4.4 Wash your hands. Follow the hand washing procedure to wash your hands.

 

4.5 Change to work shoes. Enter the door of the shoe room, sit on the bench, face the door, take off the slippers, put the slippers into the lower layer of the shoe cabinet, take out your work shoes from the upper layer of the shoe cabinet, sit and rotate 180 degrees with your back to the door and put them on.

 

4.6 Wash hands and dry.

 

4.6.1 Wet your hands with water to 10cm above your wrist in the sink, wash with detergent, make the skin of 10cm on your hands and wrists full of foam, and rub for about 15 seconds.

 

4.6.2 Rinse your hands with water, rinse the soaked rice on your hands, turn your hands up and down, and rub them until they don't feel greasy.

 

4.6.3 Visually check that hands are clean.

 

4.6.4 Extend your palm to 8~10cm below the dryer hand, and dry your hand until it is dry.

 

4.7 Change to clean underwear. Take off the work clothes and put them in the personal locker. Take off the work cap, work clothes and work pants with the personal number from the wall hook in a locker room and put them on. Put it on in order from top to bottom, that is: first put on the hat, mask, then top, and then pants. Pay attention to tie all the tops in the trouser pockets, tuck all the hair into the caps, and check whether the coats and caps are neat.

 

4.8 Wash hands and disinfect.

 

4.8.1 Wet your hands with water to 10cm above your wrist in the sink, wash with detergent, make the skin of 10cm on your hands and wrists full of foam, and rub for about 15 seconds.

 

4.8.2 Rinse your hands with water, rinse the soaked rice on your hands, turn your hands up and down, and rub them until they don't feel greasy.

 

4.8.3 Visually check that hands are clean.

 

4.8.4 Disinfection. Soak hands to 10cm above wrist in chlorine-containing disinfectant for 30 seconds.

 

4.8.5 Extend your palm to 8~10cm below the dryer hand, and dry your hand until it is dry.

 

4.9 Wear coveralls. Remove the one site with the Individual Number from the closet. Wear them from bottom to top, being careful not to let the coveralls touch the ground.

 

4.10 Receipt and disinfection. Push the door into the buffer room, put your hands under the automatic induction sprayer filled with 75% ethanol, spray for disinfection, shake your hands, and let the ethanol dry.

 

4.11 Enter the clean room. Open the buffer chamber door and enter the dust-free area.

 

4.12 When personnel leave the clean area, follow the reverse procedure for entering the clean area. Note that when dragging work clothes, undress from bottom to top.

 

4.13 Visitors from outside must be approved by the factory, and under the guidance and supervision of the workshop management personnel, enter and leave the dust-free workshop according to the prescribed procedures. Foreign visitors must strictly abide by the management regulations of the workshop. During the production period of the clean room, outside visitors are not allowed to enter.

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