Cleanrooms by purpose

1. Industrial clean room

Targets the control of inanimate particles. It mainly controls the pollution of air dust particles to the working object, and the interior generally maintains a positive pressure state. It is suitable for precision machinery industry, electronic industry (semiconductor, integrated circuit, etc.) aerospace industry, high-purity chemical industry, atomic energy industry, opto-magnetic product industry (optical disc, film, tape production) LCD (liquid crystal glass), computer hard disk, computer magnetic head production and other industries. ​​

2. Biological clean room

In order to control the contamination of living particles (bacteria) and inanimate particles (dust) to work objects. Can be further divided into:

A. General biological clean room, mainly to control the contamination of microbial (bacteria) objects. At the same time, its internal materials should be able to withstand the erosion of various sterilants, and generally maintain positive pressure inside. In essence, the internal materials must be able to withstand various sterilization processes in an industrial clean room.

B. Biological safety clean room: It mainly controls the pollution of the living particles of the working object to the outside world and people. Negative pressure with the atmosphere should be maintained inside.

MICROELECTRONICS CLEANROOM

Cleanroom Classifications:Introduction for Microelectronics Cleanroom

A clean room means a room in which the quantity of particles floating in the air and, when necessary, the temperature, humidity, and pressure, can be controlled, the main objective of the dust in a given room is determined according to the requirements of the products to be handled in the room.

(A) Cleanliness and the number of ventilation cycles. The cleanliness of the room depends upon the number of ventilation cycles performed per unit time. the structure should be contrived so that the air flow is distrubed as little as possible and due care should be taken to prevent the accumulation of dust on surfaces anywhere in the clean room. In order to maintain the cleanliness of the room, the inflow of contaminating particles from outsid must be prevented. To obtain the required room pressure, outside air of apprepriate quality and quantity is necessary.

(B) Material and anxiliary equipment for clean room Material is employed for the ceiling, walls and floor. when necessary, such auxiliary equipment as air showers in the entrances and pass-boxes in the walls must be installed.

(C) Control of personnel , materials Personnel and materials brought, are the main sources of dust in clean rooms, so adequate controls must be adopted. For example, all personnel should be made to pass through air showers and change into dust-free clothes before entering clean rooms.