Heat sink and heat spreader bonding structure

摘要

A heat sink and heat spreader bonding structure includes a metal heat sink, a metal heat spreader, and an eutectic structure formed between the heat sink and the heat spreader by heating the heat sink and the heat spreader to a specific temperature of the eutectic temperature of the heat sink and the heat spreader but below the respective melting point of the heat sink and the heat spreader to cause the internal metal atoms of the heat sink and heat spreader to be rearranged. This bonding structure maintains the heat transfer efficiency of the bonding layer between the heat sink and the heat spreader, eliminates formation of crevice, heat resistance, and oxidation in the bonding layer.