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The ED copper foil helps in reducing the effect of the radio frequency and microwave frequency waves by absorbing the waves, attenuating them so that the waves do not interfere in other wireless signals. ,The shielding function of copper foil depends to a large extent on the thickness of the copper foil, with thicker foils having more attenuation. X is producing copper foil of various thicknesses ranging from nine micron to 105 micron, and the customer can choose a suitable thickness based on the attenuation which is required. The flexibility of the copper foil will decrease as the thickness increases,but the attenuation will also increase. In some cases, the user can wrap several layers of thinner copper foil over each other to get the desired attenuation and flexibility.