Shadow era foil7/13/2023 ![]() The picture tube shadow mask of color TV set used ordinary steel or non-expandable steel (INVAR, a material containing 36% Ni) a long time ago. (1) Magnetic shielding and electromagnetic wave shielding The process of adopting a ferritic steel grade better than austenitic SUS304 (18Cr-8Ni) is also an alternative to the latter's magnetic shielding performance. In order to reduce the cost in the future, people will change the material to SUS436J1L (19Cr-0.5Mo-Ti, Nb-LC). The shielding performance of SUS444 got evaluated. It is a conclusion drawn by comparing and judging its value at a certain distance. For shielding properties, considering the magnetic shielding properties and electromagnetic wave shielding properties, according to What the primary telephone company talks about is confidential in the comparison of the materials used. Large telephone companies and communication equipment manufacturers have evaluated various materials' shielding properties and adopted SUS304. Starting about ten years ago, shielding became an important issue. Initially, it is made of an ordinary steel plate and then painted. (3) Magnetic shielding and electromagnetic wave shielding.Ĭommunication equipment wiring cabinet, such as decorative cabinet style settings, put loop devices in the cabinet. Taking into account the shielding of electromagnetic waves and magnetic lines of force, the representative steel type SUS304 of ferritic stainless steel with a plate thickness of 0.15 to 0.25 mm is used to make a case that prevents noise interference, shields electromagnetic and lithium-ion batteries. As mobile phones enter the 3G era, stainless steel is a shielding plate for 3G mobile phones. In consideration of high durability, stainless steel should be the right choice.Īlmost all lithium-ion battery cases are using stainless steel, and aluminum products have recently started to compete (see the description in the "Battery Case" chapter for details). Due to mobile phones' popularization, the number of times a button pressed has increased from 200,000 to 300,000 times to 3 million times. Yaoyi products 0.05mm SUS304 can be applied here. In consideration of lighter weight, corrosion resistance, and elasticity, stainless steel foils with a thickness of 0.02~0.07mm were popular. The disc springs are used for the keys of resin or phosphor bronze. In Europe and America, designers use stainless steel designs in mobile phones. The body (shell) used aluminum or plastic because of the emphasis on lightweight and later changed to magnesium alloy to prevent scratches. People used Various materials from the body (housing) to various parts. The mobile phone is a product that integrates the outstanding achievements of electronic technological innovation. The focus of stainless steel from coated steel plate to 0.05mm SUS304: When processing stainless steel, some shortcomings, such as severe mold wear and rust marks, were caused by powder. In the beginning, the stamping processing department had the only experience in processing ordinary steel. At that time, Matsushita Electric Industrial and Sanyo Electric had their stamping processing departments, while Sharp and other manufacturers needed to commission processing and cooperation.Īfter Sharp Corporation, a home appliance manufacturer, implemented stainless steel, Sanyo Electric, Matsushita Electric, and other manufacturers have adopted stainless steel one after another. To cope with this shortcoming, home appliance manufacturers began to send out stainless steel to the stamping processing cooperation factory and negotiate with the stainless steel manufacturer. The chance of contact between the operator's hand and the cross-section of these product components increases, it exposing the shortcomings of the surface-treated steel plate rusted on the cut end surface. As the guide device (such as the car driving line guide device, etc.), the screen of the computer, the TV, and the like have become larger. ![]() In the beginning, the frame of the small mobile TV used a surface-treated steel plate. The market share of today's large LCD color TVs competes with large plasma color TVs, starting with small portable TVs in the initial stage.
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