The utility model relates to the field of electronic technology, and discloses an electromagnetic shielding film and a circuit board, in which the electromagnetic shielding film includes a shielding layer and a film layer. The shielding layer is arranged on the shielding layer through a film layer, and the one side of the shielding layer near the film layer is a flat surface. By setting holes through the upper and lower surfaces of the shielding layer, the volatile matter in the film layer passes through the shielding at high temperature. The through-hole of the layer is exhausted to avoid the difficulty of evaporating volatiles in the film layer at high temperature, thus avoiding the stripping between the layer of the electromagnetic shielding film and the circuit board caused by the foaming layer of the electromagnetic shielding film, thus ensuring the grounding of the electromagnetic shielding film and the derivation of the interference charge. In addition, a convex conductor particle is arranged on the side of the shielding layer near the film layer to make the conductor particles. When the electromagnetic shielding film is pressed with the circuit board, the particles can pierce the film layer and connect with the layer of the circuit board, thus ensuring the layer connection between the shielding layer and the circuit board.
【技术实现步骤摘要】
电磁屏蔽膜和线路板
本技术涉及电子
,特别是涉及一种电磁屏蔽膜和线路板。
技术介绍
随着电子工业的迅速发展,电子产品进一步向小型化,轻量化,组装高密度化发展,极大地推动挠性电路板的发展,从而实现元件装置和导线连接一体化。挠性电路板可广泛应用于手机、液晶显示、通信和航天等行业。在国际市场的推动下,功能挠性电路板在挠性电路板市场中占主导地位,而评价功能挠性电路板性能的一项重要指标是电磁屏蔽(ElectromagneticInterferenceShielding,简称EMIShielding)。随着手机等通讯设备功能的整合,其内部组件急剧高频高速化。例如:手机功能除了原有的音频传播功能外,照相功能已成为必要功能,且WLAN(WirelessLocalAreaNetworks,无线局域网)、GPS(GlobalPositioningSystem,全球定位系统)以及上网功能已普及,再加上未来的感测组件的整合,组件急剧高频高速化的趋势更加不可避免。在高频及高速化的驱动下所引发的组件内部及外部的电磁干扰、信号在传输中衰减以及插入损耗和抖动问题逐渐严重。目前,现有线路板常 ...
【技术保护点】
1.一种电磁屏蔽膜,其特征在于,包括屏蔽层和胶膜层,所述胶膜层设于所述屏蔽层上;所述屏蔽层上设有贯穿其上下表面的通孔,所述屏蔽层靠近所述胶膜层的一面为平整表面,所述屏蔽层靠近所述胶膜层的一面上设有凸状的导体颗粒。
【技术特征摘要】
1.一种电磁屏蔽膜,其特征在于,包括屏蔽层和胶膜层,所述胶膜层设于所述屏蔽层上;所述屏蔽层上设有贯穿其上下表面的通孔,所述屏蔽层靠近所述胶膜层的一面为平整表面,所述屏蔽层靠近所述胶膜层的一面上设有凸状的导体颗粒。2.如权利要求1所述的电磁屏蔽膜,其特征在于,所述导体颗粒的高度为0.1μm-30μm。3.如权利要求1所述的电磁屏蔽膜,其特征在于,所述屏蔽层的厚度为0.1μm-45μm,所述胶膜层的厚度为1μm-80μm。4.如权利要求1-3任一项所述的电磁屏蔽膜,其特征在于,所述屏蔽层包括金属屏蔽层、碳纳米管屏蔽层、铁氧体屏蔽层和石墨烯屏蔽层中的一种或多种。5.如权利要求1-3任一项所述的电磁屏蔽膜,其特征在于,...
【专利技术属性】
技术研发人员:苏陟,
申请(专利权)人:广州方邦电子股份有限公司,
类型:新型
国别省市:广东,44
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