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Published bySenthilkumaar J.S. Modified over 6 years ago
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14ME404 INTRODUCTION TO MEMS DISCIPLINE ELECTIVE-II Thanking everyone for MEMS as an elective subject Dr.J.S.Senthilkumaar, Professor Mechanical Engineering.
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Objectives Gain a fundamental understanding of standard micro fabrication techniques and its issues Know the major classes, components and applications of MEMS devices / systems and to demonstrate an understanding of the fundamental principals behind the operation of these devices / systems. Understand the unique requirements, environments and applications of MEMS Apply the knowledge of micro fabrication techniques and applications to the design and manufacturing of MEMS device or a Microsystems. Foster interest for further study.
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Syllabus Unit 1: OVERVIEW AND WORKING PRINCIPALS OF MEMS AND MICROSYSTEMS UNIT 2: ENGINEERING SCIENCE FOR MICROSYSTEMS DESIGN AND FABRICATION UNIT 3: MICROSYSTEMS DESIGN UNIT 4: MATERIALS FOR MEMS UNIT 5: MICROSYSTEMS AND THEIR FABRICATION
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UNIT 1: OVERVIEW AND WORKING PRINCIPLES OF MEMS AND MICROSYSTEMS Evolution of microfabrication, Microsystems and microelectronics Microsystems and miniaturization Applications of MEMS in Industries Micro sensors, micro actuation, MEMS with micro actuators Micro accelerometers Micro fluidics
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WHAT IS MEMS? MEMS = MicroElectroMechanical System Any engineering system that performs electrical and mechanical functions with components in micrometers is a MEMS. (1 μm = 1/10 of human hair) Available MEMS products include: ● Micro sensors (acoustic wave, biomedical, chemical, inertia, optical, pressure, radiation, thermal, etc.) ● Micro actuators (valves, pumps and microfluidics; electrical and optical relays and switches; grippers, tweezers and tongs; linear and rotary motors, etc.) ● Read/write heads in computer storage systems. ● Inkjet printer heads. ● Micro device components (e.g., palm-top reconnaissance air-crafts, mini robots and toys, micro surgical and mobile telecom equipment, etc.)
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HOW SMALL ARE MEMS DEVICES? They can be of the size of a rice grain, or smaller! Two examples: - Inertia sensors for air bag deployment systems in automobiles - Microcars
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Inertia Sensor for Automobile “Air Bag” Deployment System
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Micro Cars
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MEMS MEMS = a pioneer technology for Miniaturization – A leading technology for the 21 st Century, and an inevitable trend in industrial products and systems development
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MINIATURIAZATION – The Principal Driving Force for the 21 st Century Industrial Technology There has been increasing strong market demand for: “ Intelligent,” “ Robust,” “ Multi-functional,” and “Low-cost” industrial products. Miniaturization is the only viable solution to satisfy such market demand
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Market Demand for Intelligent, Robusting, Smaller, Multi-Functional Products
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Small systems tend to move or stop more quickly due to low mechanical inertia. It is thus ideal for precision movements and for rapid actuation. Miniaturized systems encounter less thermal distortion and mechanical vibration due to low mass. Miniaturized devices are particularly suited for biomedical and aerospace applications due to their minute sizes and weight. Small systems have higher dimensional stability at high temperature due to low thermal expansion. Smaller size of the systems means less space requirements. This allows the packaging of more functional components in a single device. Less material requirements mean low cost of production and transportation. Ready mass production in batches. Miniaturization Makes Engineering Sense!!!
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