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Specific Process Knowledge/Thin film deposition/MVD: Difference between revisions

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The MVD coatings are created as self-assembled monolayers on a surface when a molecular vapor of chemials is present.  
The MVD coatings are created as self-assembled monolayers on a surface when a molecular vapor of chemials is present.  


These chemicals, typically it is flourinated organosilanes, have a teflon-like tail consisting of -(CF<sub>2</sub>)<sub>x</sub>CF<sub>3</sub> and, in the other end, a reactive group -Si<sub>(teflon)</sub>Cl<sub>x</sub>. As shown in the figure below, the chlorine atoms react with -OH groups of the surface to form a chemical bond -Si(<sub>(teflon)</sub>)-O-Si<sub>(surface)</sub>- under elimination of HCL. This means that both Si and SiO<sub>2</sub> surfaces are coated because of the native oxide on Si surfaces.  
These chemicals, typically flourinated organosilanes, have a teflon-like tail consisting of -(CF<sub>2</sub>)<sub>x</sub>CF<sub>3</sub> and, in the other end, a reactive group -Si<sub>(teflon)</sub>Cl<sub>x</sub>. As shown in the figure below, the chlorine atoms react with -OH groups of the surface to form a chemical bond -Si(<sub>(teflon)</sub>)-O-Si<sub>(surface)</sub>- under elimination of HCL. This means that both Si and SiO<sub>2</sub> surfaces are coated because of the native oxide on Si surfaces.  


<gallery caption="Some chemicals of the MVD and the surface reaction" widths="200px" heights="150px" perrow="2">
<gallery caption="Some chemicals of the MVD and the surface reaction" widths="200px" heights="150px" perrow="2">