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PCB board manufacturing process 1
Before the advent of circuit boards, circuit connections were made through point-to-point wiring. However, with the increasing lifespan of electronic products, circuit aging has become increasingly apparent. This is a serious issue of line reliability; line breakage can lead to open or short circuits at line nodes.
Before the advent of circuit boards, circuit connections were made through point-to-point wiring. However, with the increasing lifespan of electronic products, circuit aging has become increasingly apparent. This is a serious issue of line reliability; line breakage can lead to open or short circuits at line nodes. To address these issues, new PCB manufacturing techniques have been adopted. This article will break down each step of the circuit board manufacturing process with detailed explanations and demonstrations.
With continuous technological advancements, the types of PCBs have also diversified. Based on the number of sides and layers, PCBs can be classified as single-layer, double-layer, multi-layer, single-sided, and double-sided, etc. The manufacturing processes for different types of PCBs also vary; the more sides, the more complex the PCB manufacturing steps.
PCB design is a crucial step in the PCB production process, often referred to as PCB design or PCB layout. The circuit board should be strictly compatible with the components to be mounted/soldered on the board and the overall project requiring the PCB. Due to these requirements, designers typically use PCB design tools to create the PCB layout. The PCB design steps can be further divided into the following parts:
PCB schematic: A schematic diagram showing the connections of components on the circuit board. It can be said that the drawing of the schematic is the focus of the circuit board manufacturing process, the lifeblood of the circuit board. The quality of the schematic is closely related to the quality of the project.
PCB drawing: This is a basic installation diagram of electronic components. Those familiar with PCBs may know that a PCB is made by covering a metal foil on a base insulating board, then etching away the unnecessary parts of the metal foil. The remaining metal foil then serves as the connection for PCBA components, and components can now be assembled according to the markings on the PCB drawing.
BOM file: This is a procurement file. For turnkey projects, PCBA component procurement, surface mount processing, and soldering all require these files.
Component library: The component prototype library used in the schematic.
PCB library: This refers to the external libraries of chips, resistors, capacitors, etc., on the PCB board.
CAM file: This file refers to the Gerber and NC Drill files. All design software can export this file, mainly for use by PCB manufacturers.
Designing printed circuit boards requires the use of design tools. We recommend several popular applications, including Altium, Eagle, KiCad, Cadence, OrCAD, Pads, etc.
Note: Before the PCB manufacturing process begins, designers should inform their contract manufacturer of the version of the PCB design software used to design the circuit. This helps avoid problems caused by discrepancies. Once the PCB design is approved for production, the designer can export the design in a format supported by their manufacturer. A commonly used file type is called a Gerber file.
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