3/12/2009

Micro electromechanical systems

The term mems, for micro electro mechanical systems, was discovered in the 1980’s to describe new, sophisticated mechanical systems on a chip, such as micro electric motors, resonators and so on. Today, the term mems in practice is cause to refer to any microscopic electronic with a mechanical function, which can be fabricated in a batch process in england, the term mst for micro system technology is preferred, and in japan mems are simply referred to as "Micromachines".


The overviews in these terms are relatively minor and are often used interchange.though mems processes are generally classified into a number of categories --- such as surface machining, bulk machining, liga, and efab --- there are indeed thousands of different mems processes. Some produce fairly simple geometries, while others offer more complex 3_d geometries and more versatility. A company making accelerometers for airbags would need a completely different design and process to produce an accelerometer for inertial navigation. Changing from an accelerometer to another inertial device such as a gyroscope requires an even greater change in design and process, and most likely a completely different fabrication facility and engineering team.mems technology has generated a tremendous amount of excitement, due to the vast range of important applications where mems can offer previously unattainable performance and reliability standards. In an age where everything must be smaller, faster, and cheaper, mems offers a compelling solution. Mems have already had a profound impact on certain applications such as automotive sensors and inkjet printers. The emerging mems industry is already a multi-billion dollar market. It is expected to grow rapidly and become one of the major industries of the 21st century. Cahners in--stat group has projected sales of mems to reach $13b by 2004. The european nexus group projects even larger revenues, using a more inclusive definition of mems.microtechnology is often constructed using photolithography. Lightwaves are focused through a mask onto a surface. They solidify a chemical film. The soft, unexposed parts of the film are washed away. Then acid etches away the material not protected.microtechnology's most famous success is the integrated circuit. It has also been used to construct micromachinery

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