PCB circuit board width and line spacing are two different concepts.
For example, you can understand this concept by using water pipes. PCB boards are like laying water pipes on the floor of a house. Linewidth refers to the thickness of the water pipe, the wider the line, the greater the current can be passed, but the greater the space occupied. The distance between two water pipes should not be too close, too close.
For example, the official explanation is this: PCB boards are printed circuit boards, the original PCB boards are a substrate, and the entire surface is covered with copper. PCB wiring is on this piece of copper surface, drawing the line to retain the metal copper, the rest all corroded. If the line width is not too thin and too thin, there may be a break when corrosion occurs. Line spacing should not be too small, two lines too close, corrosion may not be clean corrosion, direct short circuit.
Etching tolerance, etching equipment tolerance in the end how big. Necpcb weight explains the line width of printed PCB line spacing tolerance. Solves the pace of cutting-edge printed PCB.
Definition of tolerance: For example, the tolerance of PCB line width is 10% in PCB machining, which refers to the range of positive and negative tolerances in design. How can we judge whether the tolerance of PCB line width meets the control standard?
Necpcb explains the weight message and solves the accuracy of PCB etching. Commonly used PCB etching technology is: acid etching, high density linewidth within 3/3 mil of the best corrosion process of the plate is: vacuum etching.
How much tolerance is there for acid etching? How many PCBs don't pay attention to this problem. The line tolerance for acid etching is 15-20um. The etching tolerance for ordinary etching equipment is 20-35um. This data has been in the PCB board factory for more than 20 years of rough printed PCB fate.
Vacuum etching and vacuum etching refer to the combination of the pump with the PCB sheet pasting film. Through the pump's suction of corrosive medicine, uniform manufacturing process, thus providing high precision PCB printing requirements. Dongguan Huaqiang Fast Circuit Board Co., Ltd. vigorously develop vacuum etching process, PCB industry breaks the history. Advanced Vacuum Etching High-end Requirements. Vacuum Etching tolerances up to 5-9um super-technical progress. Completely solve the 2.5mil/2.5mil below the line width of the finishing requirements. Through the Necpcb vacuum etching process, the enterprise all the way into various high-tech research and development institutions, weapons manufacturing industry.
