- Shaped electrodes that concentrate current/heat flow - Electrodes that press against the metal pieces  - Controls/mechanisms to position electrodes accurately

1. The tip of the spot welding head is separated, also called ordinary spot welding head, and the tip has an elastic contact surface to form ohmic contact; 2. The middle gap is between 0.05mm and 0.10mm; 3. It is easy to oxidize and has a lower high-temperature hardness than tungsten. It is suitable for ordinary spot welding heads such as flat and round shapes. It is easy to deform when making special-shaped spot welding heads;

When installing a composite ceramic evaporation boat, it is necessary to maintain a certain inclination (slightly higher at the end of the aluminum wire) to facilitate the flow of liquid aluminum to the end of the boat. This is important regarding the added liquid aluminum spreading area, the lifespan of the forward evaporation boat, and the uniformity of the forward coating. The evaporation boat should adhere to the horizontal plane horizontally.