By Danny Banks
MEMS units are discovering more and more common use in quite a few settings, from chemical and organic research to sensors and actuators in automobile purposes. besides this huge progress, the sphere continues to be experiencing starting to be pains as fabrication strategies are subtle and new purposes are tried. somebody fascinated with coming into the sector should have a practical wisdom of simply what's attainable with MEMS applied sciences in addition to the myriad matters all in favour of fabrication and equipment integration. Microengineering, MEMS, and Interfacing: a pragmatic advisor offers an easy, down-to-earth review of the present kingdom of MEMS know-how. the 1st part systematically stories a few of the bulk and floor micromachining tools, photolithography mask, and nonsilicon procedures, interpreting their services, barriers, and advised makes use of. subsequent, the writer info the features of person units and platforms, their benefits and shortcomings, and the way they are often mixed to accomplish wanted performance. He comprises condensed introductions to suitable chemistry and biochemistry after which demonstrates purposes of MEMS in those parts. starting with a quick creation to electronics, the ultimate part explores the problems all for interfacing MEMS elements with different platforms. With really appropriate use of illustrations to elucidate the dialogue, Microengineering, MEMS, and Interfacing: a pragmatic consultant deals hands-on instruments for fixing particular difficulties besides the perception essential to use them such a lot successfully.
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Extra info for Microengineering, MEMS, and Interfacing: A Practical Guide
This would be adequate for many applications, but consider the situation in which a 10-µm thick resist is required. 6. 53 µm. Note that projection printing would typically be used for high-resolution printing on thin films of resist. 34-µm resolution with the 10-µm resist. In this case, we have considered the entire thickness of the resist film as the separation distance, which will give a worst-case estimate of resolution. 36 µm). 47 µm, which will be adequate for many microengineering applications.
Resolutions of several thousand dots per inch can be achieved, with good even coverage, allowing the production of features down to a few tens of micrometers. The resulting transparency can be taped to a glass plate for use in an aligner. Note, however, that many polymer films tend to be relatively opaque to UV light, and the resulting mask will not be very robust in any case. It may well be preferable to produce a mask plate from the film. Again, several options present themselves. Chromium-coated mask blanks are available from several suppliers; these may be quartz, but given that dimensions are not going to be critical in this case, lower-cost glass alternatives may be used.
The ideal thing to do is treat a microengineering technology as any other technology: first identify the problem and then select the most appropriate technology to solve it. Of course, identifying the most appropriate technology does assume awareness of the technologies that are available. REFERENCES 1. , There’s Plenty of Room at the Bottom: An Invitation to Enter a New Field of Physics, presentation given on 29 December 1959 at the annual meeting of the APS at Caltech. 2. , Silicon as a mechanical material, Proc.
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