What is the material and principle of the heat sink?

Most of the heat sinks on the market are made of copper or aluminum, and the best heat dissipation effect is copper, but the price is too high, and in order to neutralize the price and effect, many heat sinks on the market now use the copper plug process. The principle is that heat is transferred to the heat sink through the close contact between the heat sink and the heat source (such as the surface of the chip, etc.), and the heat sink is formed into a variety of appearances through a special processing technology. These appearances are beneficial to the heat in the shortest time. Disperse inside. So as to achieve the effect of cooling the hardware equipment.