I am having some serious discussions regarding the planning of a new Photo print area. Our current print area is not really a true "clean room" environment. Basically we have positive air flow, tacky floor mats at the entries,  and use the smocks and hair nets. Many board shops I've seen operate in a similar fashion. However,  I would like to know how many bare board manufactures really have a true certified clean room. I know of a few shops that advertise they do but they have never had their rooms certified and from my experience, I doubt they would pass a test.  The problem is that I want to look at putting in a true class 100K clean room but I am meeting resistance. Basically, it is felt by many here that no board shop really has a true clean room and the cost associated with one does not justify the implementation. Because I have personally seen this to be the case and have never actually seen a true clean room in a board shop, I am having difficulty disagreeing. 

As I understand it,  a true class 100k clean room has to be certified by an outside source. In addition all incoming air has be deionized. There should be no flat surfaces and absolute no paper for fiber products.  So I have a few questions I would like to pose to Technet.

1. Does anyone know of a bare board manufacture that has a true class 100K clean 
    room where I can obtain some additional information?  

2.  Does anyone feel a true clean room is really warranted for a board manufacture that 
     currently producing lines down to only .005" ?

3. Does anyone have any data from studies performed in a bare board manufacturing 
    environment that would support the need for a true clean room and would you be willing 
    to share the information?

Any and all help in this matter will be appreciated.

Ed Cosper