UCI Fall 2012 - Dr. Marc Madou.  Chapter 1 Si as an Electronic. Photonic and Mechanical material  Chapter 2 Lithography  Chapter 3 Advanced Lithography.

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Presentation transcript:

UCI Fall Dr. Marc Madou

 Chapter 1 Si as an Electronic. Photonic and Mechanical material  Chapter 2 Lithography  Chapter 3 Advanced Lithography  Chapter 4 Additive Techniques: Oxidation of Si  Chapter 5 Additive Techniques: Physical Vapor Deposition (PVD)  Chapter 6 Additive Techniques: Chemical Vapor Deposition (CVD)  Chapter 7 Additive Techniques: Electroless and Electrodeposition  Chapter 8 Subtractive Techniques: Wet Etching  Chapter 9 Subtractive Techniques: Dry Etching  Chapter 10 Si Modification: Doping of Si and Laser Annealing  Chapter 11 LIGA and Pseudo -LIGA  Chapter 12 Bulk and Surface Micromachining  Chapter 13 Carbon-MEMS  Chapter 14 Structural Colors  Chapter 15 Commercial Applications

 One Midterm (20 %)  Attendance, class activity (15%)  Three Assignments (15 %). First one today.  Final (50 %)  Videos are a frequent feature of this class, do check them out before exams. Example: How the Accelerometer in your iPhone works.How the Accelerometer in your iPhone works.  Comments: Fundamentals of Microfabrication Facebook Site.: Fundamentals of Microfabrication Facebook Site.

 The refractive index of porous Si is lower than for bulk Si: it is inversely proportional to the anodization etch current density. A distributed Bragg reflector (DBR) selectively reflects a band of incident wavelengths and is easily formed in highly doped p-type Si by periodically lowering and raising the etch current density, resulting in a sequence of porous layers with alternating high and low refractive index. Panel a shows an optical image of a 500 × 500 μm 2 region irradiated with different overlaid scan patterns, with different doses. The wafer was etched with an alternating high/low current density for 4 s per layer, with a total of 15 bilayers formed. The etch rate is progressively slowed by larger irradiation doses, resulting in thinner porous layers that reflect shorter incident wavelengths. Each dose produces a different reflected color when illuminated with white light, with red/orange colors corresponding to areas of lowest dose. The potential of this approach to form patterned arrays of color pixels and lines for display applications is shown in b, where vertical lines, each 10 μm wide, were irradiated to form alternating red-green- blue stripes. Panels c and d show examples of selectively patterning color reflective areas in which two dragon images appear in different colors, corresponding to different irradiated doses in each area.