In the rapidly developing field of electronic manufacturing, high-density interconnect (HDI) circuit boards have become the core components of many electronic products due to their excellent performance and wide application. However, HDI circuit boards often encounter some quality problems during the manufacturing process. How to effectively deal with these problems is the key to improving product quality and ensuring market competitiveness.

Common quality problems and causes

Circuit breakage and short circuit: Due to the high integration and precision design of HDI boards, the circuit spacing is small, and the slightest carelessness during processing may cause circuit breakage or short circuit.

Poor welding: Problems such as loose welding points, cold welding, etc. will seriously affect the electrical performance and reliability of HDI boards.

Material problems: The quality of materials such as substrate materials, copper foil, and solder mask ink is unstable, which will lead to the overall performance of HDI boards.

Improper process control: Improper control of key processes such as etching, drilling, and electroplating will also lead to quality problems.

Effective response strategy

Optimized design and reasonable process design: Fully consider the characteristics of HDI boards in the design stage, reasonably layout the circuits, and avoid overly compact designs.

Process optimization: According to the characteristics of HDI boards, optimize key processes such as etching, drilling, and electroplating to ensure processing accuracy and stability.

Strict material screening and control Supplier selection: Select reputable and quality-guaranteed suppliers to ensure the quality of raw materials. Material testing:

Strictly test the raw materials entering the factory to ensure that they meet the standards. Strengthen process control and quality testing Process monitoring: Establish a complete process control system to monitor and record key processes in real time. Quality testing: Introduce advanced testing equipment to conduct comprehensive and detailed quality testing of HDI boards.

Improve employee skills and awareness Skill training: Strengthen employee skills training to improve employees’ understanding and response capabilities to HDI board quality issues. Quality awareness: Improve employees’ quality awareness so that every employee understands the importance of quality.

Establish a quality management system System establishment: Establish a complete quality management system, from design, raw materials, production to testing, each link has clear standards and processes. Continuous improvement: Through regular quality reviews and internal audits, problems are discovered and continuously improved.

 

The response to HDI circuit board quality issues requires us to start from multiple aspects, including optimizing design and process, strict material screening and control, strengthening process control and quality testing, improving employee skills and awareness, and establishing a quality management system. Only in this way can we ensure that the quality of HDI circuit boards is stable and reliable and meets market demand.

Thick copper PCB plays an important role in many fields with its high current carrying capacity, excellent thermal management performance and enhanced mechanical strength.
With the continuous development of electronic technology, the requirements for the current conduction and carrying capacity of circuit boards are getting higher and higher. Thick copper PCB has gradually become an important trend in the electronics field due to its unique material properties. Thick copper PCB mainly refers to the use of copper foil thicker than standard PCB in the manufacturing process. The copper thickness is usually 105 microns (3OZ) and above, and sometimes even up to 400 microns (12OZ).

Thick copper PCBs are widely used in the industrial field, especially in industrial automation, industrial robots, power supply systems, and renewable energy systems.
Today, SHENZHEN BEST PCBA CO., LIMITED introduces two thick copper PCBs. Both are 4-layer through-hole boards. The copper thickness requirements are 6OZ inside and 6OZ outside, and 3OZ inside and 10OZ outside! Let’s take a look at these two PCB:

           

The dark green PCB is a product with 3OZ inside and 10OZ outside, and the light green PCB is a product with 6OZ inside and 6OZ outside. Let’s take a look at their slice diagrams:

           

The circuit design of thick copper PCB is relatively simple, but it is difficult to control the parameters during the production process!

Material selection: For 10OZ thick copper circuit boards, prepregs with high resin content need to be selected to ensure that the amount of glue flowing from the interlayer prepregs is sufficient to fill the inner layer graphics, while avoiding quality problems such as too thick insulating dielectric layers causing the finished board to be too thick or too thin, resulting in delamination, high-voltage test failure, etc.

Pressing production: The copper thickness of thick copper plates cannot be completed by electroplating and powering up like ordinary PCBs. The copper thickness of 10OZ is achieved by pressing 0.3mm copper plates on both sides of the core board, and then electroplating and powering up. The pressing of copper plates is much more difficult than that of copper foil.

Drilling production: When using special plates with high TG, high speed, high frequency, and thick copper, the difficulty of drilling roughness, drilling burrs, and drilling pollution is increased. The cumulative total copper thickness and board thickness of multilayer boards make it easy for drilling knives to break, and the problem of oblique drilling caused by board thickness is a production difficulty.

Circuit production: Due to the thick copper foil, it is difficult to etch out the complete circuit by conventional etching methods. Different factories have their own etching technology for thick copper PCBs. We also adjust the process for different products, accurately control the etching depth and shape, and ensure the quality of circuits and holes.

 

With the development of science and technology, information and communication technology are changing with each passing day, and people’s requirements for computer performance are getting higher and higher. Correspondingly, the hardware requirements for computer communication equipment are also getting higher and higher. PCB is the basic product of electronic equipment, and its high-end precision determines the performance of the entire finished computer communication equipment!

Today, SHENZHEN BEST PCBA CO., LIMITED brings you an FPGA acceleration card for high-performance computing and network acceleration devices. Let’s first take a look at what the PCB board looks like.

The bright red solder mask ink, immersion gold + electroplated gold finger 30U” surface treatment process make the whole product look very high-end. But what really attracts people to this product is not just its appearance, but its complex design and precise production process.
First of all, let’s take a look at its step process.

The conventional step process is to use non-flowing glue PP to press and stack the layers in the step part. And our product needs to achieve a high-speed effect, so the whole board uses Panasonic M6 PCB high-speed board, but there is no non-flowing glue PP corresponding to M6 on the market. We can only use flowing glue PP for pressing, which is very challenging for the production of step parts.
In addition, this product is also an 18-layer mechanical blind hole board. Let’s take a look at the pressing structure diagram

The motherboard of the product is divided into two boards, L1-4 and L5-18, and the finished product is made after three laminations. The lamination of multi-layer boards is extremely difficult, and the lamination of multi-layer special board products must be controlled in detail. The result of a mistake is that all the previous efforts are wasted!
Finally, in order to ensure the transmission of high-speed signals, reduce signal attenuation, ensure that the signal is stronger and more reliable, and also to prevent signal distortion problems, we also added back drilling technology in product production.
CKT-1 drills from the top layer to the bottom layer with a depth of 1.25+/-0.05, CKB-1 drills from the bottom layer to the top layer with a depth of 0.35mm and a depth of 1.45+/-0.05, 0.351mm with a depth of 1.25+/-0.05, 0.352mm with a depth of 1.05+/-0.05, and 0.353mm with a depth of 0.2+/-0.05.

In today’s technological wave, the importance of printed circuit boards (PCBs) as an indispensable component in electronic devices is self-evident. Whether it is smartphones, computers, medical devices, automotive electronics, or even aerospace equipment, printed circuit boards are indispensable. So, what is the role of printed circuit boards? How can we choose the right circuit board according to project requirements?

The main function of printed circuit boards

Connection function
One of the core functions of printed circuit boards is connection. It can connect different electronic components through wires to form a complete circuit system. Through printed circuit boards, these components can work according to predetermined logic and sequence to achieve various complex functions.

Support function
In addition to the connection function, printed circuit boards can also provide stable support for electronic components. Electronic components are fixed on printed circuit boards to form a compact and stable overall structure. This structure can not only protect electronic components from interference and damage from the external environment, but also improve the stability and reliability of the entire circuit system.

Heat dissipation
In electronic equipment, as electronic components work, a lot of heat will be generated. If this heat cannot be dissipated in time, the performance of electronic components will be degraded or even damaged. The metal conductors and copper foil layers on the printed circuit board can effectively conduct heat to the surface of the circuit board, and then dissipate the heat into the air through devices such as radiators, thereby ensuring the normal operation of electronic components.

How to choose a suitable circuit board
Determine the type of circuit board according to project requirements
Before choosing a circuit board, you must first clarify the specific needs of the project. For example, the scale, complexity, and working environment of the project will affect the choice of circuit boards. For example, for projects that need to withstand harsh environments such as high temperature and high humidity, it is necessary to choose circuit boards with good heat and humidity resistance; for projects that need to achieve high-frequency transmission, it is necessary to choose circuit boards with lower impedance and higher bandwidth.

Consider the performance parameters of the circuit board
When choosing a circuit board, you also need to consider the performance parameters of the circuit board. For example, the number of layers, wire width, wire spacing, copper foil thickness, etc. of the circuit board will affect the performance of the circuit board. Generally speaking, the more layers, the wider the wire width, the smaller the wire spacing, and the thicker the copper foil, the better the performance of the circuit board. However, these parameters will also affect the cost and difficulty of making the circuit board. Therefore, when choosing a circuit board, you need to weigh it according to the actual needs of the project.

Choose reliable suppliers and manufacturers
When choosing a circuit board, you also need to choose reliable suppliers and manufacturers. A good supplier and manufacturer can provide high-quality circuit board products and can provide perfect after-sales service and technical support. Therefore, when choosing a circuit board, it is necessary to conduct in-depth investigation and understanding of the supplier and manufacturer to ensure that they have sufficient strength and credibility.

As an indispensable component in electronic equipment, the importance of printed circuit boards is self-evident. When choosing a circuit board, it is necessary to make comprehensive considerations based on the specific needs of the project, select the appropriate circuit board type and performance parameters, and select reliable suppliers and manufacturers. Only in this way can the smooth progress of the project and the high-performance operation of electronic equipment be guaranteed.

In this era of information explosion, communication technology has long penetrated into every aspect of our lives. However, do you know that behind every smooth video call and every instant message, there is an unsung hero – communication PCB (printed circuit board)? Today, let us unveil its mystery and explore how it affects the quality of our daily communications.

PCB, or printed circuit board, is a basic component used to connect electronic components in electronic devices. And communication PCB, specifically refers to those circuit boards used in communication equipment, which carry core functions such as signal transmission and data processing, and are the “nerve center” for the normal operation of communication equipment.

So, how does communication PCB affect the quality of our daily communications?
In terms of signal transmission, the design of communication PCB plays a vital role in the integrity and accuracy of the signal. A high-quality PCB design can ensure that the loss of the signal during transmission is minimized, thereby ensuring the clarity and reliability of communication. On the contrary, an unreasonable PCB design may cause signal attenuation, distortion, and even communication interruption.

Stability is another key indicator of communication equipment. The material, process and design of communication PCB directly affect the stability of the equipment. High-quality PCBs can resist interference from the external environment and reduce equipment failures, thereby ensuring the continuity and stability of communication.

Compatibility is also an issue we have to consider. With the continuous advancement of communication technology, new communication standards and interfaces are emerging in an endless stream. A good communication PCB should have a good forward-looking design, be able to adapt to future technology upgrades and changes, and ensure that users do not need to replace the entire communication system when replacing equipment or upgrading services.

In order to understand the importance of communication PCBs more intuitively, we can look at the construction of 5G base stations. 5G base stations have extremely high performance requirements for PCBs, because 5G signals have fast transmission speeds and large data processing volumes, which puts higher requirements on the signal transmission capacity and stability of PCBs. Only high-quality communication PCBs can ensure the stable transmission of 5G signals and provide users with a smoother communication experience.

Faced with such an important communication PCB, how should we improve its performance and user experience?
Choosing high-quality PCB materials and advanced manufacturing processes is the key. The design of PCBs also needs to keep pace with the times and constantly introduce new design concepts and technologies to adapt to the rapid development of communication technology. A strict quality control system is also essential to ensure that each communication PCB meets the expected performance standards.

As the core component of communication equipment, the performance of communication PCB is directly related to the quality of our daily communication. Understanding and valuing the role of communication PCB and choosing high-quality PCB products and services will be the key to improving the quality of our communication.