Clean Space Technologies Then and Now


The principle of Clean area design and style begins from virtually 150 years ago when these units were utilized for bacterial manage in hospitals. Today, clean rooms have completed a long way and developed to the modern technology. In earlier day, these clean rooms had been developed for fulfilling the requirement of clean atmosphere for industrial manufacturing for the duration of 1950s and the same clean rooms are also utilised for selection of applications in several industries.


A clean space is defined as a place that provides attentively controlled environment that has a low level of environmental pollutants such as airborne microbes, dust, chemical vapors, and aerosol particles. When the air entered in a clean area it is filtered and then constantly circulated by way of higher efficiency particulate air (HEPA) or ultra-low particulate air (ULPA) filters. These filters are employed to eliminate internally generated contaminants. The persons, who function inside the clean room, wear protective clothing whilst enter and exit through airlocks, while gear and furnishings inside the clean space is specially created to generate minimal particles.


Today, more than 30 various business segments use clean rooms like semiconductor and other electronic components, pharmaceutical, and biotechnology industries.


Contemporary clean rooms had been created during the Second Planet War to enhance the good quality and reliability of instrumentation utilised in manufacturing guns, tanks and aircraft. During this time, HEPA filters were also created to include the unsafe radioactive, microbial or chemical contaminants that resulted from experiments into nuclear fission, as effectively as study into chemical and biological warfare.


On the other hand, clean rooms for manufacturing and military purposes had been getting developed the value of ventilation for contamination control in hospitals was getting realized. The use of ventilation in a healthcare setting gradually became standard practice in the course of this time.


The concept of ‘laminar flow’ was introduced for the duration of 1950s and 1960s, when NASA’s space travel system was initiated. This marked a turning point in clean space technologies and from this time, the evolution of clean rooms gained momentum.


In the late 1950s, the Sandia Corporation (which later became Sandia National Laboratories) began investigating the excessive contamination levels identified in clean rooms. Researchers found that clean rooms have been getting operated at the upper practical limits of cleanliness levels and identified a need to have to develop alternative clean area designs.


In 1961, Professor Sir John Charnley and Hugh Howorth, showed a tremendous improvement in unidirectional airflow by creating a downward flow of air from a a lot smaller sized location of the ceiling, directly over the operating table.


Also in 1961, the initial regular written for clean rooms, known as Technical Manual TO 00-25-203, was published by the United States Air Force. This regular considered clean space style and airborne particle standards, as effectively as procedures for entry, clothes and cleaning.


In 1962, Patent No. 3158457 for the laminar flow room was issued. It was recognized as an “ultra clean room.”

By 1965, there have been many vertical down flow rooms have been utilised in which the air flow ranged amongst 15 m (50 ft)/min and 30 m (100 ft)/min. It was during this time that the specification of .46 m/s air velocity and the requirement for 20 air adjustments an hour became the accepted normal.


By the early 1970s the principle of “laminar flow” had been translated from the laboratory to wide application in production and manufacturing processes.


The 1980s saw continued interest in the development of the clean room. By this stage, clean room technology had also grow to be of distinct interest to food manufacturers.


In 1987, a patent was filed for a system of partitioning the clean space to enable zones of especially high-level cleanliness. This improved the efficiency of person clean rooms by allowing places to adopt different degrees of cleanliness according to the location and want.


In 1991, a patent was filed for a helmet system that can be utilised in a health-related clean area in which the user is protected from contaminated air in the environment, while the patient is protected from contaminated air being exhausted from the user’s helmet. Such a device decreases the possibility of operating space personnel getting contaminated with viruses carried by the sufferers being operated upon.

The pace of clean space technology transformation has accelerated over current years. Considering that the year 2000, there have been substantial advances in new clean space technology, which have helped to streamline manufacturing and analysis processes, even though also lowering the danger of contamination. Most of the technological developments of the previous decade have been directed towards the manufacture of sterile goods, specifically aseptically filled merchandise.


In 2003, Eli Lilly pioneered the improvement of a new technique for the prevention and containment of cross contamination in the course of the manufacture of pharmaceutical powders employing a specially created “fog cart”. This enables the operator to be covered by an exceptionally fine fog of water on exit from a vital location, virtually eliminating the risk of transferring dust traces beyond their suitable confines.


The Future of Clean Rooms

Nowadays, clean rooms are utilized in selection of applications. The presence of these units can be seen in the manufacturing of semiconductor and other electronic components, as nicely as in the pharmaceutical and biotechnology industries. Additionally clean room technologies has more recently been applied to micro- and Nano-method processes, and this looks certain to be an area of development in coming years. The improvement of clean area technologies is likely to continue to be driven by specific crucial elements like the increasingly technical use of exotic physical and biological phenomena, the central part of increasingly fine structures, the creation and use of components of the highest purity, and the increasingly broad-based utilization of biotechnology. Offered the scale of these challenges, clean room technology appears set to remain indispensable to production in coming years.