依照美国有关标准，无尘车间是指一个车间内的空气受到温度，湿度和压力的控制，而在空气中漂浮的尘粒受到数量和规格的限制。

1．具备运风循环的洁净度

    无尘车间的洁净度是根据空气在车间内的运风次数而定。它所具有的结构必须是防止和避免尘粒在任何表面出现。同样重要的是为避免外界的空气直接进入无尘车间，无尘车间内必须保持正压。为达到这目的，进入无尘车间的空气应受到流量和洁净的严格化控制。

2．材料和设备

    无尘车间所选的材料必须是不易有裂逢发生，天花和墙身采用组合式净化室专用钢板，地板是需用不易沾尘材料。无尘车间工作人员出入口必须安装合源“风淋室”，货物出入口必须安装合源“传递箱”。

3．控制人为和搬运产品所产生的尘粒

    人流和搬运材料是产生尘粒的主要来源，所以必须充分加以控制。所有进入无尘车间的人员必须更换防静电的工作服和适当的鞋，后由风淋室吹尘后进入无尘车间。所有搬运的材料和产品，必须经过缓冲区或通过“传递箱”避免空气不规则的流通。

4．附助装置

    供水、排水系统、电力装置需要互相配合，同时由于无尘车间是密封式的，所以安全的设施，包括防火电源等都必须得到妥善的安排。

5．生产程序的统筹化

    建立良好的结构以利于生产高品质的产品的环境控制，材料的储存，绝缘和材料的收发，监定以及成品的出入无尘室都必须作好管制。

6．智慧管理无尘室

    强调员工对无尘室洁净度和检查污染质的重要性，必须依各部位的责任和方法训导员工定期检查和控制洁净室。总之，有好的洁净环境，才能生产好的产品。

According to American Federal Standard, a clean room is “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 given room is determined caaording 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 os disturbed 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 outside must be prevented. To obtain the required room pressure, outside air of appropriate quality and quantity is necessary.

(B) Material and anxiliary equipment for clean room Material that is not suscepitable to caracking or the adherence of particles and which creates little dust 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 and 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.

(D) Other facilities According to the work to be performed water supply and drainage facilities and electricity and gas supplies may be necessary. There facilities and related equipment should be easy to use should be designed in such a way as to avoid and deterionation in the air cleaning performace of the system. Because Clean Room is completely closed, measures to take in case of emergencies such as a fire, a power failure, must be fully considered.

(E) The first decision you’ll face is choosing between a manufactured modular cleanroom and a conventional construction cleanroom. A manufactured modular cleanroom iscustom built at the vendor’s factory and assembled at your facility, while a conventional construction cleanroom need and consider the return on your investment.

(F) To determine usage requirements, estimate how many people will work in the cleanroom and how often they will enter and exit. The size and amount of furniture and equipment must also be considered. These requirement will help you to determine the size of cleanroom you need.