PCBA panel plays a vital role in the field of electronic manufacturing. It refers to splicing multiple printed circuit boards assembly into a large board so that multiple circuit boards can be processed and soldered simultaneously during production. PCBA panel design can improve production efficiency, reduce costs, optimize production processes, etc., providing a solid guarantee for the manufacture of electronic products.
Paneling is the process of processing and welding multiple PCB in the same period through PCBA manufacturing equipment during the PCB assembly design process.
It greatly improves production efficiency, effectively reduces production costs, reduces the possibility of human errors, and can further improve the efficiency and quality of PCB assembly manufacturing.
When designing PCBA panels, multiple factors must be considered to ensure that materials can be used as effectively as possible during the PCBA panel manufacturing process, reduce resource waste, and improve PCBA production efficiency and product quality.
The size and shape of the circuit board should be as consistent as possible, ensuring that there is enough clearance between each single board, and adding positioning holes and reference marks on the panel to reduce the complexity and difficulty of PCBA processing.
For larger PCB fabrication, PCB assembly boards that need to undergo reflow soldering or wave soldering and have a width of ≥60mm, the number of panels in the direction perpendicular to the conveying edge should generally not exceed 2 rows.
For smaller PCB making, if the PCB board size is very small, the number of panels in the direction perpendicular to the conveying edge can exceed 2 rows, but the total width in the direction perpendicular to the conveying edge cannot exceed 150mm, and tooling must be used during production to prevent PCBA board deformation.
Design V-grooves between PCBA panels, and open V-grooves between boards, making the connection the weakest area of the single board, and separating the panels by hand or machine.
With a size of 80~125mm, the PCB uses the same direction paneling design
Centrosymmetric PCBA paneling is often used to produce multiple circuit boards with the same shape and similar layout. The circuit boards are arranged horizontally, vertically or obliquely symmetrically with the center point as the symmetry axis. If there is a large hair shape produced by the paneling, an auxiliary block can be added in the middle of the panel.
For gold finger PCB that require central symmetric paneling, the production of the gold finger board is relatively special. The gold finger part needs to be gold-plated, and each finger needs to lead out copper wire to increase conductivity. Therefore, the paneling needs to be paid attention to the gold finger needs to be exposed outside the board to facilitate the final electroplating.
Mirror symmetric paneling, the front and back of the circuit board are completely consistent after paneling. Double-sided pcb boards are all SMD devices, which can use a steel mesh to reduce the preparation time and meet the conditions of reflow soldering.
Adding a reinforced frame around the printed circuit board panel can improve the rigidity, especially in large-size PCBA panels. Adding support points can ensure the flatness of the single board during processing.
Take the processing of gold fingers as an example. In the panel PCBA design, the processing order of gold fingers should be considered. The gold finger area should avoid wiring and electronic component placement, and a protective layer should be added to prevent damage during processing. These design principles help to achieve an efficient and low-cost manufacturing process while meeting strict process and quality requirements.
In PCBA production, the mismatch between component selection and PCBA panelization design may lead to a series of production and quality problems. The following is a detailed case analysis, problem analysis, and solution.
During the PCBA manufacturing process, some components were offset or could not be properly welded after welding. The PCBA panel design caused the components to be unable to be installed or work properly. Due to the mismatch, welding defects occurred, affecting the quality of the circuit board.
Wrong or inaccurate components are used, resulting in incorrect placement of components; or during soldering, the pad size or spacing does not match the component pins, resulting in loose soldering or short circuit.
After the PCBA panel design is completed, a strict design review is carried out, including checking the circuit board size, component type, pad design, heat dissipation design, etc.
During the PCBA manufacturing process, functional testing is performed to ensure that the circuit board reduces operational errors and mistakes and ensures PCBA quality.
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