كم من أنواع ووظائف مختلفة من حبر PCB
Sep. 28, 2021
At present, there are many kinds of inks in the market. PCB inks are mainly divided into circuit inks, solder resist inks and character inks. 1. circuit ink As a barrier to prevent corrosion of the circuit, it protects the circuit during etching. It is generally liquid photosensitive. There are acid corrosion resistance and alkali corrosion resistance. Alkali resistance is more expensive. This layer of ink should be dissolved with alkali after corrosion out of the line. 2. Solder resist ink It is painted on the line after the line is finished to protect the line. There are liquid photosensitive, heat curing and ultraviolet hardening. The pad is reserved on the board to facilitate the welding of components and play the role of insulation and anti-oxidation. 3. Legend ink It is used to mark the surface of the board, such as the symbol of components. It is generally white. In…