Jun01
What is Wave Soldering? Laminar Wave and Turbulent Wave Purpose

What is Wave Soldering? Laminar Wave and Turbulent Wave Purpose

Before the development of Surface Mount Technology (SMT), almost all printed circuit board assemblies (PCBAs) had to go through the process of wave soldering to achieve the purpose of soldering electronic components to the board.

The process of “wave soldering” gets its name from using a large pool of molten tin during the soldering process. This pool of tin is heated to a temperature where the solid tin bar can melt and form a solution. This molten solution can be thought of as a “lake”. When the lake is still, it is called a “laminar wave”. When the lake is agitated, it becomes a “turbulent wave”. The PCB is like a boat sailing on the surface of the lake, allowing the molten tin solution to adhere to the electronic components and the PCB. After the soldered parts pass through the molten tin, it rapidly cools and solder the electronic component to the PCB.

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May30
The Hidden Dangers of Using Overdue PCBs: Can Baking Salvage Them?

All materials actually have its shelf-life, some shorter and some longer than others. So what happens when expired materials are used? Think about what will happens when you eat expired food. What about using expired Printed Circuit Boards (PCBs)?

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May22
What is the Purpose of Surface Finishes for PCB? A Summary of the Pros and Cons of Common PCB Finishes

整理幾種較常見PCB表面處理的優缺點

This is just a summary article about PCB surface finishes. Workingbear has only worked on the electronic system assembly factory and has not been involved in the production process of bare PCBs. Therefore, the following insights are based on personal opinions. If you have different opinions or notices any mistakes, please feel free to comment and engage in discussion.

The main purpose of PCB surface finishes or call treatment is to protect the copper layer on the surface of PCB from direct contact with air, and prevent oxidation.It also facilitates effective soldering, whether directly or indirectly, with the solder, ensuring electrical conductively attaching electronic components.

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May18
Clarifying the Concept of Electronic Component Soldering Strength

micro_USB_connector_solder

While organizing an article on the structural analysis of Micro-USB connectors, Workingbear came across an interesting soldering concept that he would like to discuss with everyone.

During the product development and NPI verification phase, RD often comes to me, I am a Manufacturing Process Engineer, with questions about the length of the metal shell soldering pins on Micro-USB connectors. Typically, these pins are only 0.8mm long because the thickness of mobile phone boards is usually around 0.8mm to 1.0mm only. However, our company’s PCBs have a thickness of 1.6mm.

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May16
What is the difference between PCB and PCBA? PCB is like land with roads, but it doesn’t have buildings yet

What is the difference between PCB and PCBA? This is actually something that should be easily understood, but since someone asked, Workingbear will try explain it briefly here. If any readers notice any errors, please feel free to correct me.

Most people are probably familiar with the term “PCB,” and if you’ve read some stock-related financial articles, you’ve likely heard of it. However, if you’re not in the electronics industry, you might be less familiar with the term “PCBA,” and you might even confuse it with PCB. Although PCB and PCBA differ by only one letter, they have a significant difference in the electronics manufacturing industry.

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