An all-copper fin-brazed heat sink (All‑Copper Fin‑Brazed/Soldered Heat Sink) is a high-end heat sink whose base, heat pipes/vapor chambers (VC), and fin arrays are all made of red copper (T2/C1100 with purity ≥99.9%). The fins are integrally joined to the base or heat pipes by vacuum brazing, tin soldering or high-temperature thermal adhesive. It abandons the lightweight advantage and low cost of aluminum fins, and focuses entirely on ultimate thermal conductivity, zero interfacial thermal resistance and heat dissipation under local high heat flux. It features one of the lowest thermal resistance and the best performance among air-cooled heat sinks.