Displaying items by tag: cleanroom

Environment Conditions

• The relocation of staffs, materials and manufacture machines is appropriate
• Clearly Classified different cleanliness class for different area such as production area, maintenance area and
corridor
• The temperature and humidity have control by 24 hours automotive monitoring system and usage patterns
• The smoothly of pipeline, moving lines in facility supply system
• Cleanroom level design assessment
• The convenience of secondary piping hock-up construction
• The convenience of overall system maintenance

FAB Cleanroom

In the microelectronics industry a semiconductor fabrication plant (commonly called a fab; sometimes foundry) is a factory where devices such as integrated circuits are manufactured.

A business that operates a semiconductor fab for the purpose of fabricating the designs of other companies, such as fabless semiconductor companies, is known as a foundry. If a foundry does not also produce its own designs, it is known as a pure-play semiconductor foundry.

Fabs require many expensive devices to function. Estimates put the cost of building a new fab over one billion U.S. dollars with values as high as $3–4 billion not being uncommon. TSMC invested $9.3 billion in its Fab15 300 mm wafer manufacturing facility in Taiwan.[1]

Classification of Cleanroom based on Functionality

Typically used in manufacturing or scientific research, a cleanroom is a controlled environment that has a low level of pollutants such as dust, airborne microbes, aerosol particles, and chemical vapors. To be exact, a cleanroom has a controlled level of contamination that is specified by the number of particles per cubic meter at a specified particle size. The ambient air outside in a typical city environment contains 35,000,000 particles per cubic meter, 0.5 mm and larger in diameter, corresponding to an ISO 9 cleanroom which is at the lowest level of cleanroom standards.

Classification of Cleanroom based on Functionality

Cleanrooms are used in practically every industry where small particles can adversely affect the manufacturing process. They vary in size and complexity, and are used extensively in industries such as semiconductor manufacturing, pharmaceuticals, biotech, medical device and life sciences, as well as critical process manufacturing common in aerospace, optics, military and Department of Energy.

A room in which the concentration of airborne particles is controlled, and which is constructed and used in a manner to minimize the introduction, generation, and retention of particles inside the room and in which other relevant parameters, e.g. temperature, humidity and pressure are controlled as necessary.

Course cleaning

• Determine the surface sensitivity to handling and solvents. If the surface is sensitive to IPA or acetone, use filtered critical neutral detergent. If the surface is sensitive to handling, limit or eliminate vacuum use and handling as necessary to prevent GSE damage.

• If computing equipment is to be brought into clean areas laptop devices are preferred. If this is not possible desktop computers should be thoroughly cleaned inside and outside the casing paying particular attention to exhaust fans from the power supply. 

• Computer monitors should be thoroughly vacuumed paying particular attention to the monitor vents prior to cleaning procedure below.

• Computer keyboards should be turned upside down and a jet of clean filtered compressed air or nitrogen directed between the keys prior to cleaning procedure listed below. 

• Remove loose particles from the GSE by thoroughly vacuuming all surfaces, including holes, crevices, and corners, with a vacuum cleaner. This step should not be performed for items sensitive to handling. Minimize direct nozzle contact with GSE surfaces and continue until no particles are visible on GSE surfaces.

In order to meet project contamination cleanliness requirements, ground support equipment (GSE) used in clean areas at MSSL for flight hardware integration and testing needs to be cleaned at regular intervals. This is to ensure that surface contamination levels are minimized and the possibility of contamination redistribution from the GSE to the flight hardware is significantly reduced.

When bringing equipment into the cleanroom, ensure that you observe the following: All cleanroom users should ensure that they consult the cleanroom manager before they bring any equipment and processes into the cleanroom. This cannot be stressed enough! The monitoring of equipment and processes going into the cleanroom is an important part of the general contamination control of the cleanroom. If bringing equipment or processes into the cleanroom ensure that you follow the detailed procedures listed below.

Who is best suited to perform housekeeping in a clean environment? Those that work in the cleanroom, a special in-house cleaning team, or an outside cleaning service? There are advantages and disadvantages to each, say cleaning supply representatives.

It is recommended you read the list of approved and banned materials first. For computers and associated equipment, please let the cleanroom manager knows you plan to bring these items in and if you require LAN access from within the cleanroom. Before entering any part of the cleanroom, pre-clean the items with IPA and fibre free wipes. Detailed cleaning instructions will follow this general guideline. For equipment such as computers, keyboards etc, vacuum clean using a general purpose vacuum cleaner. Particular attention should be paid to the ventilation ports. This pre clean should be done external to the cleanroom and anteroom and items should be covered with clean bagging material, but not of cleanroom quality. As a guide, notebook computers are preferred to desktop computers (although this is not always practical) not only due to size but also from a cleanliness aspect. Clean all equipment at an external location to the cleanroom. This equipment can then be bagged to minimize contamination.