23.12/2022
Merry Christmas and Happy New Year 2023!
27.06/2022
POLEMA’s QMS confirmed its compliance with ISO 9001:20015
POLEMA JSC confirmed the compliance of the current QMS with the requirements of ISO 9001:2015.
03.06/2011
Progressive materials for multi-functional vacuum coatings
Application fields of materials for multi-functional vacuum coatings, characteristics of sputtering targets and evaporable sources used for technologies of physical deposition of hardening, protective, decorative and light-reflecting coatings, resistive, switching and transparent electro conductive films.
24.05/2011
Molybdenum and tungsten products for production of leucosapphires
POLEMA JSC is the leading global manufacturer of chromium, molybdenum, tungsten products, metal powders and composite materials.
Chromium sputtering targets and evaporable cathodes
JSC POLEMA is a leading global producer of sputtering targets and evaporable sources (cathodes) made of refined electrolytic chromium. The company's share in this segment of the global market is approximately 30%.
Use
Products made of chromium are used in various technologies for the physical deposition of thin films and functional coatings (the PVD method) in the production of electronic components, displays and tools; in the vacuum chroming of watches, parts of household appliances, the working surfaces of hydro-pneumcylinders, slide valves, piston rods, tinted glass, mirrors, car parts and accessories, and other machines and devices. When depositing strengthening coatings from ionized plasma using the method of vacuum-arc vaporization of a cathode or by magnetic target sputtering, chromium is used as an adhesive substratum and, in combination with other materials, is used for multi-layer and nanostructural multi-functional wear-resistant coatings. High-quality large-size planar targets made of electrolytic refined chromium (ERC) are used by leading manufacturers of plasma and liquid-crystal displays to deposit metallic conductors during the formation in monitor matrices of thin-film transistors (TFT technology).
Production
Production process:
Chromium ERCr flakes → powder → compact stock → ERCr-PM product
The powder undergoes a special treatment that ensures material purity equal to that of the base ERCr chrome.
Compaction is done in the following manners:
- hot isostatic pressing (HIP);
- extrusion (HP);
- when necessary, rolling of sintered semi-finished products is performed (R).
Final tooling is done in accordance with the client's request.
| Brands |
Cr, %, minimum |
Impurities, ppm, maximum | ||||||||
| O | N | C | S | Fe | Si | Ni | Al | Cu | ||
| ERCr 99.9-PM | 99.9 | 350 | 100 | 200 | 30 | 500 | 100 | 100 | 70 | 40 |
| ERCr 99.95-PM | 99.95 | 200 | 50 | 100 | 20 | 250 | 50 | 40 | 30 | 30 |
| ERCr 99.97-PM | 99.97 | 100 | 50 | 70 | 20 | 100 | 20 | 10 | 20 | 20 |
| ∑ of metallic impurities Al, Fe, Cu, Ni, Si, Ca, K, Li, Mg, Mn, Mo, Na, Pb, Ti, W, Zn and others 300 ppm, maximum | ||||||||||
| ERCr 99.99-PM | 99.99 | 100 | 50 | 70 | 20 | 50 | 10 | 5 | 5 | 10 |
| ∑ of metallic impurities Al, Fe, Cu, Ni, Si, Ca, K, Li, Mg, Mn, Mo, Na, Pb, Ti, W, Zn and others 100 ppm, maximum | ||||||||||
PM – Powder Metallurgy
| Shape of treated product | Diameter, mm | Thickness, mm | Width, mm | Length, mm |
| Plate | - | From 5 to 50 | Up to 1400 | Up to 1700 |
| Disc, ring | From 65 to 400 | From 5 to 50 | - | - |
| Rod, cylinder | From 15 to 65 | - | - | Up to 600 |
The following tolerances for dimensions are applied, unless otherwise requested by the client, in mm: diameter ± 0.25; thickness ± 0.2; length and width, up to 100 ± 0.15; from 100 to 500 ± 0.25; from 500 to 1000 ± 0.4; more than 1000 ± 1.0.
