A copper microprocessor uses copper to connect transistors. Copper is a better conductor of electricity than aluminum, the metal used in most chips today.
Copper chips offer faster performance and lower power consumption and are smaller.
In the race for faster processors at lower prices, IBM marched forward last year and introduced a copper-based chip that provides a smaller and faster generation of microprocessors. What the vendors are doing According to analysts, vendors aren't rushing to manufacture copper chips because it's a very complex and expensive process. The wiring within a chip connects the transistors to one another. The transistors are basically the brains of the chip. The main benefit of copper-based wiring is that copper is a good conductor of electricity, so wires can be much thinner than aluminum and each chip can hold more transistors, making the chip smaller.