The chip Y capacitor is composed of aluminum platinum and polyester film. It has two wires and two planes, one connected to the aluminum platinum and the other connected to the polyester film. The capacitor has a simple structure and small size, which is suitable for the design of high-density circuit boards.

The aluminum platinum of the patch Y capacitor is an aluminum metal foil, which has the same function as a traditional capacitor. In the safety patch Y capacitor, the aluminum platinum is the main electrode plate, in which the aluminum platinum has an aluminum oxide coating to enhance its surface area. The coating can reduce the surface energy of the dielectric, thereby increasing the capacity of the capacitor.
Unlike aluminum platinum, the polyester film dielectric has better mechanical properties and heat resistance. It can withstand high temperature and high pressure, and then work normally in a mechanical or high temperature environment. This makes the high-voltage patch Y capacitor an important electronic component widely used in various electronic products.