More Related Content
Similar to dipcoatinganded-141116050942-conversion-gate02.pdf (20)
More from SanDeepSharma926061 (20)
Recently uploaded (20)
dipcoatinganded-141116050942-conversion-gate02.pdf
- 1. Preet Kumar M. Tech 1st Year Enrollment No.- 14551009 Centre of Nanotechnology
- 2.  Dip coating refers to the immersing of a substrate into a tank containing coating material, removing the piece from the tank, and allowing it to drain. The coated piece can then be dried by force-drying or baking. It is a popular way of creating thin film coated materials along with the spin coating procedure.
- 3. The dip coating process can be, generally, separated into 3 stages:  Immersion: the substrate is immersed in the solution of the coating material at a constant speed preferably judder free  Dwell time: the substrate remains fully immersed and motionless to allow for the coating material to apply itself to the substrate  Withdrawal: the substrate is withdrawn, again at a constant speed to avoid any judders. The faster the substrate is withdrawn from the tank the thicker the coating material that will be applied to the board.
- 5. Fig. 2: Gelation process during dip coating process, obtained by evaporation of the solvent and subsequent destabilization of the sol
- 6.  Owing to its simplicity, this method lends itself to automation. Film thickness is controlled by coating viscosity and rate of withdrawal from the tank. Dip tanks come in all shapes and are sized to accommodate the largest object to be coated.  Dip coating has its drawbacks, including: light parts tend to float and fall from the conveyor; film thickness can vary from top to bottom ("wedge effect"); fatty edges develop on the bottom of parts as excess coating drains; and refluxing by the solvent vapors above the tank removes some of the coating
- 7.  Dip coating processes are used for plate glass for solar energy control systems (Calorex®) and anti- reflective coatings (Amiran®) on windows. The dip coating technique is also applied for optical coatings, e.g. on bulbs, for optical filters or dielectric mirrors by various SMEs and other companies, fabricating multilayer systems with up to 30 or 40 coatings with very high precision.
- 8.  What is Electro deposition?  Electro deposition is the process of coating a thin layer of one metal on top of a different metal to modify its surface properties. Done to achieve the desired electrical and corrosion resistance, reduce wear & friction, improve heat tolerance and for decoration.  E.D. is a surface coating method that forms an adherent layer of one metal on another.
- 10.  Electrodeposition is a key method for making the materials used in computer chips and magnetic data storage systems; every day it helps lower the cost and improve the performance of our information society.  However, electrodeposition is also emerging as a uniquely capable method for making materials and structures needed for a nanotechnology- and nanobiotechnology based future.  It also provides some unique opportunities for directly writing materials onto a surface without going through the photoresist masking steps that are used in conventional electrochemical microfabrication.
- 11. Electrodeposition has three main attributes that make it so well suited for nano-, bio- and microtechnologies: • It can be used to grow functional material through complex 3D masks. • It can be performed near room temperature from water-based electrolytes. • It can be scaled down to the deposition of a few atoms or up to large dimensions.
- 12.  Automotive parts  Printed circuitry and electrical contacts  General engineering components  Gold-Silver wares and Jewelry  Musical Instruments and  Trophies Soft metal gaskets  Anti-seize bearings  Decorative door, light & bathroom fittings  Production of micro parts for MEMS (MicroElectroMechanical systems)