Generally speaking, it generally contains copper, tin, nickel, zinc, aluminum, chromium, lead, mercury, and exists in a variety of forms - single substance, compound;
There are also different types of physical forms - alloys, coatings, etc.
Some components also have precious metals, silver in a variety of circuit components have, this is due to silver in the metal is the best conductor, as well as special chemical properties, in addition to platinum elements also exist in some components. Of course, the content of these elements is very small, and with the progress of technology, the amount of these elements is currently very small.
1. The commonly used metals for integrated circuit boards are gold, silver, copper and iron, but the content of gold and silver is very small.
2. Integrated circuit board is the use of semiconductor production process, in a small monocrystalline silicon chip to produce many transistors and resistors, capacitors and other components, and in accordance with the multi-layer wiring or tunnel wiring method to combine components into a complete electronic circuit. It is represented in the circuit by the letter \"IC\" (also useful word symbol \"N\