Etching

The manufacturing process for a two-layer printed circuit board (PCB) involves several precise steps to ensure quality and functionality. It begins with cutting the board material according to customer specifications, followed by drilling holes as per engineering data. Next, electroplating is used to deposit a thin copper layer on the hole walls, and the circuit pattern is transferred onto the board. Graphics electroplating adds layers of copper, gold, nickel, or tin where needed, and etching removes unwanted copper. A soldermask is applied to protect the circuit, and a silkscreen is added for identification purposes. The board then undergoes 100% fly probe testing to detect any defects. Finally, a thorough inspection ensures all boards meet quality standards, with minor defects being repaired as necessary. Read More

The text explains the structure of a PCB, which consists of a substrate (typically prepreg) and copper conductive layers. The copper layers are etched according to the circuit design to form the desired circuit paths. PCBs usually have two outer layers, with additional layers used for complex circuits or specific electrical requirements. Multi-layer PCBs, created by laminating single layers together, are common in more complex designs. When selecting the number of layers for a PCB, it is typically determined by the circuit's complexity and the customer's specific requirements. Many PCB buyers may not be familiar with how to choose the appropriate layer count, but it's essential for meeting performance and reliability needs. Read More

PCB ink is used in printed circuit boards and is mainly divided into circuit ink, solder mask ink, and silkscreen ink. Circuit ink acts as a barrier to prevent circuit corrosion and protect the circuit during etching, available in acid and alkali corrosion-resistant types. Solder mask ink protects the completed circuit and comes in liquid photosensitive, thermal curing, and ultraviolet curing types. Silkscreen ink is used to mark the board's surface. When using PCB ink, attention must be paid to maintaining the ink's temperature, thorough stirring, using compatible cleaning agents, ensuring a good exhaust system, and maintaining operating conditions. Read More