Photolithography

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  • Microlens Case Study

    a) Microlens Micolens are small lenses with a diameter smaller than 1 mm, they can work by diffraction, refraction or a combination of these two. When arranged regularly on a single substrate they form a microlens array. In order to be considered a good quality lens, microlenses must have qualities such as to low wavefront aberrations, consistency of focal length and pitch across the array, durability and low price. (Daly 2001) Microlens arrays have several applications, such as CCD arrays, digital projectors, photocopiers, mobile-phone cameras, 3D imaging, displays and light field photography. Some of these applications have been around for many years. Recently, due the expansion of manufacture technology, new utilizations are being studied and put into practice. Most of manufactures are now using lithographic and ion exchange methods. These are methods are great to produce diffraction-limited lens, but with a limited range of focal ranges and diameters. Thus, it is necessary the study and development of new technologies. b) Plenoptic Camera Plenoptic camera is a type of camera that uses microlens arrays to capture a 4D light field information about a scene. (Montilla, Puga et al. 2015). As it is illustrated in figure 1 below, in a regular camera there is only one lens and only one pixel is captured, however in a plenoptic camera there is the camera lens, the microlens array and an image sensor. In order to work, the microlens array is placed in the focal plane of the camera…

    Words: 820 - Pages: 4
  • PZT Case Study

    conducting metal used for sending a potential difference to vibrate the PZT by piezoelectric effect. In addition, the nickel layer is also has a role as a mechanical support having PZT is fragile. Piezo electrode patterning incorporates wet etching process using liquid chemicals or etchants to take off materials from its substrate. The etchant used in this lab is Nickel etchant TFB composed of nitric acid, potassium perfluoroalkyl sulfonate and water. In this lab, our focus is to study the use…

    Words: 1012 - Pages: 5
  • Carbon Nanotube Lab Report

    the Engineering Physics Lab in EGH. Due to excessive usage by other students and power supply failure, there was difficulty finding a time for machine usage. The testing chamber was unable to be cut and assembled, but will be completed the following semester by continuing students. Transistor Design For testing purposes, two CNT transistor substrates were designed. The designed transistors are similar to those designed by Eric Snow and F. Perkins in their 2005 paper “Capacitance and Conductance…

    Words: 1447 - Pages: 6
  • Wolf Vostell's The Fluxus Movement

    Born in 1932 in Leverkusen, Germany, Wolf Vostell was influential member of multiple artistic genres and art theorist of the 20th century. Beginning his career as an apprentice in photolithography, Vostell moved on to study at the Academy of Arts of Wuppertal, Germany, remaining a student from 1854 to 1855. From that point on, Wolf Vostell began to travel across Europe, soon developing his concept of the “décollage” style while in Paris. France However, Vostell did return to his studies,…

    Words: 731 - Pages: 3
  • MOSFET Case Study

    junction transistor both operationally and structurally, was fabricated by insertion of an insulating layer on the semiconductor surface. Then a gate electrode made of metal is introduced on the top. Crystalline silicon was used to work as a semiconductor whereas a layer of silicon dioxide, produced by the process of thermal oxidation, formed the insulator. The MOSFET made up of silicon did not cause electron traps at the boundary flanked by the silicon and its local oxide layer, and thus was…

    Words: 816 - Pages: 4
  • Techificial Intelligence Case Study

    networks into FPGA configuration files (companies such as DeePhi are trying on that). From the current point of view, even using a high-end server to do FPGA translation will take a few minutes, if such calculation need to be performed on portable device which has even weaker calculating power, the calculating time wil be very long. For the portable device users, how to convince them to try to reconfigure the FPGA and accept up to several tens of minutes for translation and configuration on the…

    Words: 2560 - Pages: 11
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