Tag Archives: cleanroom construction

Positive Pressure vs. Negative Pressure Cleanrooms

The majority of cleanrooms, easily more than 90%, are positive-pressure rooms—designed to keep contaminants from entering the room. Air is introduced into the cleanroom, typically at the ceiling level, after passing through a fan-powered HEPA filter that removes particles as small as .5 microns. This creates a pressurized room in which the air pressure in the room is greater than outside the room—hence, positive pressure. The air, and the contaminants in the air, are then pushed down towards the floors, and ultimately pushed out vents in the lower portions of the walls of the room. Continue reading

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LADEE Space Craft

Do you remember the LADEE space craft we wrote about a few weeks ago? The mission is now well under way, studying the atmosphere of the moon. Although it doesn’t really seem like the moon has much of an atmosphere, the sun does heat up the dust on the surface which causes it to rise. Continue reading

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High Tech Fabrication in Semiconductor Clean Rooms

Ever heard of Moore’s law? The law states, basically, that approximately every two years, the number of transistors that can be included in an integrated circuit doubles. In other words, every two years, the amount of necessary space occupied by the transistors in a computer gets cut in half. The expression of Moore’s law is that on an ongoing basis, computers are becoming smaller and smaller. Why is this? There are two reasons. First: investment in new computer technology is never in short supply. Second: the smaller and more portable computers get, the more practical, accessible and affordable they become. Continue reading

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Clean Room Cleanliness

When I think of the idea of clean rooms, my first thought is always a movie I watched a million times in high school. That movie was Bubble Boy. Without giving anything away in the story, since I know everyone is going to go out and rent it now, it is the story of a boy who is born without immunities. Because of this, his mother decides the best course of action is to seal him in a giant bubble for life so that no germs could enter his body. Essentially, he was traveling around in a portable clean room for most of his life. Continue reading

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The Importance of Careful Clean Room Construction

Clean room construction is an involved process. This is true if the product is a portable clean room, a modular clean room or a permanent, highly-controlled clean room. Companies that make use of clean rooms must be able to rely on their workspaces to perform in the way that they are supposed to. For this reason, clean room construction professionals pay special attention to all of the details that contribute to good clean room construction. What are some of these details? Continue reading

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Innovated Cleanroom Construction

Did you know the cleanroom (or clean room) was invented by a famous physicist named Willis Whitfield in 1960? However similar concepts were invented during the space race as NASA developed innovating products to improve test environments. Originally, the purpose of Whitfield’s cleanroom was to control the airflow but it has quickly developed into more antiseptic conditions. Clean room manufacturing is an American industry that has boomed across the world. Nowadays there are a variety of clean room classifications containing multiple terms such as ISO, FED STD 209, Grade A, M1 and more. Continue reading

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How to Write a Specification For and Evaluate a Design/Build Cleanroom Proposal

With the increasing emphasis on utilizing the design/build method of delivery in the construction industry, and the desire to evaluate proposals using that old adage of ‘apples to apples’, it becomes incumbent upon the owner to create a specification which will insure that contractors have the appropriate information to propose the facility accurately… Continue reading

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