Author: elina

[vc_row][vc_column][vc_single_image image="2518" img_size="large" alignment="center" onclick="link_image"][/vc_column][/vc_row][vc_row][vc_column width="1/4"][vc_wp_posts number="10"][/vc_column][vc_column width="3/4"][vc_column_text] Cooling and Displaying the Temperature of the High Current Electrical Feedthroughs Electrical feedthroughs are tools that transmit electrical signals and currents between inside and outside of the vacuum chamber. Feedthroughs include one or more conductor pins that pass through a vacuum flange that is well sealed against air leakage. The conductive pins are electrically separated from the flange by insulation. These insulators, which are mostly made of ceramic, usually tolerate a significant difference pressure along their length. All of the vacuum coating systems fabricated by VacCoat Ltd. are also equipped with electrical feedthroughs. In DTT thermal evaporation deposition systems, the high current electrical feedthroughs are used and passed electric current more than 100A through them. Passing this high current can be caused…

[vc_row][vc_column][vc_single_image image="2506" img_size="large" alignment="center" onclick="link_image"][/vc_column][/vc_row][vc_row][vc_column width="1/4"][vc_wp_posts number="10"][/vc_column][vc_column width="3/4"][vc_column_text] Chalcogenide Thin Films Deposition Chalcogenides are materials that contain at least one of the chalcogen elements, the substances of group 16 of the periodic table(sulfur, selenium, tellurium, etc.). Chalcogenic glass has received a lot of attention due to its special optical properties, such as high refractive index, infrared(IR) transparency, nonlinear optical properties, and reversible phase change from amorphous to crystalline. Photovoltaic cells are one of the applications of chalcogenide thin films. Optical properties and other characteristics of thin films (thermal, mechanical, resistance, chemical, photo-sensitivity, etc.) are highly dependent on the deposition methods. Depending on how the thin film is deposited, the stoichiometry, structure, defect stats, and many other features can be controlled. Thermal Evaporation Thermal evaporation method is used for the deposition…

[vc_row][vc_column][vc_single_image image="2495" img_size="large" alignment="center" onclick="link_image"][/vc_column][vc_column][vc_row_inner][vc_column_inner width="1/4"][vc_wp_posts number="10"][/vc_column_inner][vc_column_inner width="3/4"][vc_column_text] Precise Thickness Control in Vacuum Carbon Coaters Thickness Control of Carbon Film which is deposited on the samples to be analyzed by electron microscopy(SEM, TEM, FE-SEM, and etc.) or Energy-dispersive X-ray spectroscopy(EDX) is usually difficult to work. Due to the change in carbon sources(rod or fiber) resistance at high temperatures created during the evaporation, in some cases the thickness of deposited thin film is either less or more than the desired amount. Vacuum Carbon Coating Systems Also, for imaging samples with TEM, it is necessary to cover the grids used in this process with a supporting thin film of carbon, in which case the reproducibility of the carbon film thickness and also the quality of the deposited thin film play an important…

[vc_row][vc_column][vc_single_image image="2421" img_size="large" alignment="center" onclick="link_image"][/vc_column][vc_column width="1/4"][vc_wp_posts number="10"][/vc_column][vc_column width="3/4"][vc_column_text] What is the Glad Sputtering Technique? There are various techniques for increasing the quality of thin films deposited by vacuum coating methods. Glad sputtering is one of the most widely used techniques in the sputtering deposition process to achieve different structural architectures. Angling of the rotating sample holder relative to the cathode during the sputtering deposition process is a technique which called Glad Sputtering in the thin film industry. By changing the angle of the substrate relative to the cathode and also changing the parameters such as the rotational speed of the sample holder, vacuum chamber pressure, temperature, and etc., thin films with complex geometry can be deposited. The structure of deposited thin films could be in different geometries such as spiral,…

[vc_row][vc_column][vc_single_image image="2411" img_size="large" alignment="center" onclick="link_image"][/vc_column][vc_column width="1/4"][vc_wp_posts number="10"][/vc_column][vc_column width="3/4"][vc_column_text] Deposition of the highly reactive materials There are materials with a high affinity to oxygen among the materials which are deposited by the vacuum coating systems. If these substances are in the vicinity of a small amount of oxygen, they react quickly and burn completely. Lithium is easily oxidized when exposed to air. On the other hand, this alkali metal and its compounds have many applications in the industry. For example, this metal is used to produce rechargeable batteries that are used in smartphones, tablets, etc. The best way to lithium deposition is the thermal evaporation method. Lithium Deposition In the deposition of this metal with sputtering or electron gun methods, due to its low melting point, it is very difficult to…

Thermal evaporation is one of the most popular among the deposition methods. Simplicity of operation and proper speed are the notable strengths of this deposition method. Thermal evaporation is one of the Physical Vapor Deposition (PVD) methods during which a thin film is deposited on the substrate during a physical process.   Thermal deposition mechanism In the process of thermal evaporation, the target material is located inside an evaporation source (boat, coil, and basket) which is heated by the passage of electric current. The target material inside the evaporation source is heated to the evaporation point. Because heat generation is due to electrical resistance of the evaporation source, this method is also called resistive evaporation. After evaporation, the molecules of the target material move to the substrate and form a…