Printed circuit board (PCB) is a key element of product success. For electronic equipment, PCB is essential – by using circuits and copper wiring to connect different components to each other, PCB gives the equipment a long life. These factors are influenced by physical plate constraints such as size, material, layer and plane, and connectivity. The PCB design takes into account electrical and mechanical constraints when laying out the circuit board to give it the desired form, assembly, and function.
As devices get smaller, requiring PCBS to keep up makes PCB design and debugging more complex and difficult. The cost of reworking a PCB is high, so make sure you have a test design strategy and design for manufacturing, and consult with the design and test engineering team.
Common PCB traps
The most common problems encountered in PCB manufacturing can be avoided. Here are some common pitfalls to avoid:
When copper plating holes in a PCB are defective, coating voids may occur. These holes allow current to flow from one side of the circuit board to the other, and if the copper deposition is not perfect, gets trapped by bubbles, becomes contaminated, or many other problems, the current will not work. Often, cleaning materials after drilling can help identify potential problems.
L If the edge parts are trimmed too close, the distance between the edge and the edge will be insufficient, so as to remove the cover plate and expose the copper layer. The cover is designed to prevent copper from corroding. Ensuring that there is space between the copper edge and the circuit board edge reduces the risk of a short circuit during panel removal.
L bars appear in two ways during the etching process, and can have serious negative consequences for PCB functionality. One method is to strip the copper strip or solder mask that is too thin before dissolving and contaminating the chemical bath. Another option is to cut the area of the board too deep or two thin. When you do this, a small part of the material may crack. By designing a section with the minimum width, you can reduce the chance of producing slivers.
An acid catcher is an acute Angle in a circuit that traps acid during etching. This can damage the connection and lead to circuit failure. Double check your work to ensure that your design does not have sharp angles, especially on the fine trace line.
It is important to consider electromagnetic interference (EMI) to ensure optimum circuit performance. Good grounding, proper stacking design and shielding of sensitive wiring should protect it from noise signals are good practices.
A lack of weld barrier DAMS can lead to potential assembly problems. Tombstones, welding Bridges, and floating components are all reasons to ensure careful consideration of solder mask openings. This can also cause a short circuit in the solder between the finely spaced leads.
Trust PCB expert
Companies often rely on technical professionals to adopt best practices for PCB layout. In addition, they will use computer-aided design and Manufacturing (CAD/CAM) software, which will help identify errors, design problems and take full advantage of PCBS. Although every PCB will be different, there are some well-established practices that may benefit any PCB layout at every stage of development, so experts and software can often provide the first step (usually the finished product) to an effective template.