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The electrospinning technique for the scaffolds designing utilizes the electrostatic force for the production of polymeric fiber ranging from nanoscale to microscale. This process is control by high intensity electric field between two electrodes having electric charges of opposite polarity. One electrode is placed in the polymer solution and other is placed in collector. Generally polymer solution is pumped as result in forming a drop of solution. Afterwards, electric field is generated, which intends to produce a force, due to this the droplets results to overcome the surface tension of the solution. A jet of polymer is ejected, which. | Introduction to VLSI Fabrication Technologies Emanuele Baravelli Organization Materials Used in VLSI Fabrication VLSI Fabrication Technologies Overview of Fabrication Methods Device simulation 2 Main Categories of Materials Materials can be classified into three main groups regarding their electrical conduction properties RESISTIVITY p il-cm Insulators Conductors Semiconductors 1O16 1014 10ia id10 toe IO6 104 10s 1 to-i tc4 1O Ề 10 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 GERMANIUM Ge SILVER GLASS a NICKEL OKJDF SILICON tsif CỌpPER PURE DIAMOND GALLIUM ARSENIDE GaAs ALƯMÍHUbl ỈPURE GALLIUM PHOSPHIDE GUP PLATINUM SULFUR bFUSED CADMIUM SULFIDE cds BISMUTH ÓƯARTĨ 1 1 1 1 1 1 k 1 1 _l_i 1 J 1 1 1 1 L 1 1 1 1 1 to ie IO 14 1Ữ 1 1O 10 1O B lữ G lữ 4 1O-i 1 1Oa Ì04 10e CONDUCTIVITY Ử- Is crn I MS ƯLAT0R SEMI CON DUCTŨR----------M co HỮU c TOR -