A 4OZ Thick Copper Coil Board PCBA is a high-performance printed circuit board assembly designed for high-power, high-frequency applications requiring exceptional current capacity and thermal efficiency. Utilizing 4 oz (140 µm) copper layers, this PCBA minimizes resistive losses and supports currents exceeding 20A/mm², ideal for electric vehicle (EV) motor controllers and renewable energy systems. The multi-layer structure (up to 10 layers) incorporates buried vias and sequential lamination to achieve dense interconnects while maintaining mechanical integrity under thermal stress. Built on high-Tg FR4 substrates (e.g., Shengyi S1000-2M), it ensures stability in harsh environments (-40°C to +125°C) and complies with IPC-6012 and RoHS standards. Key manufacturing steps include controlled-depth drilling, resin-filled via encapsulation, and multi-stage lamination to prevent delamination and ensure reliability. Applications span industrial power converters, smart grid modules, and aerospace systems, emphasizing compact designs and scalable production for next-generation energy solutions.
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