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SMTP処理中にBGAパッド下のPCB樹脂材料が割れる理由

Reasons For PCB Resin Material Cracking Under BGA Pads During SMTP Processing Cracking of PCB resin material occurs due to the presence of entrapped moisture. The reason for this is a high soldering temperature that results in an increase in vapor pressure. The cracks can also occur because the board’s thermal expansion causes the spacing between the BGA pads to change. To mitigate the risk of this type of fault, alternative pad finishes can be used, which reduces the thermal impact on adjacent packages. Entrapped moisture causes pcb resin material cracks Entrapped moisture can cause a wide range of PCB failures, including delamination, blistering, and metal migration. It can also […]

インピーダンス・コントロール・ラインはPCB基板のコストを上げるか?

Does the Impedance Control Line Increase the Cost of the PCB Board? Impedance control is an important feature that affects the performance of printed circuit boards. The manufacturer can control the impedance of a PCB board by adjusting the trace configuration and the dielectric constant of the PCB material. It is essential for board designers to convey their impedance requirements in advance. Impedance control line reduces EMI issues Using an impedance control line reduces EMI issues by reducing the current that can flow through a line. As we know, the higher the current, the higher the emissions. However, by using an impedance control line, you can significantly reduce the current […]

マイクロコントローラ対マイクロプロセッサ

Microcontroller Vs Microprocessor Microcontrollers and microprocessors are two types of computer chips. The former uses semiconductor technology and is suitable for various uses, while the latter is more powerful and can execute millions of instructions per second. Both have advantages and disadvantages. Microcontrollers are cheaper and require less memory and computing power. Microcontrollers are more suitable for low-power applications A microcontroller has a low power consumption and is more suitable for low-power applications than a microprocessor. This is because the modern microcontrollers have multiple low-power modes. Microprocessors, on the other hand, require external hardware that may not be optimized for low-power operations. A microcontroller’s internal peripherals are optimized to operate […]

表面実装はんだ付けとは?

What is Surface Mount Soldering? Surface mount soldering is the process of soldering electronic components by applying flux to the surface of the components. Typical soldering components include resistors, capacitors, diodes, and inductors, which all have two terminals. ICs, on the other hand, have more than two legs, and have one pad per leg. When soldering ICs, the legs should be lightly tinned, preferably the corner pad. Surface mount soldering When soldering surface-mounted components, you must be careful to align the components properly. For instance, the leads on a TQFP microcontroller are very small and require precise placement. If you want to ensure that the soldering will work properly, you […]

PCB設計のエラーを減らし、効率を上げる方法

How to Reduce PCB Design Errors and Increase Efficiency In order to reduce pcb design errors, it is important to use the right design tools. Using a simulation tool such as Schematic Diagram Simulator can eliminate a number of design mistakes. It is also a good idea to have a second designer check your work to ensure that it is error-free. Schematic diagram simulation Schematic diagram simulation is a process that allows engineers to simulate a complete circuit board in a single step. This saves a lot of time during the design process, improves board quality, and increases efficiency. The simulation allows engineers to make changes to their designs by […]

信頼できる電子機器受託製造業者を選ぶ際に留意すべきこと

Things to Keep in Mind When Choosing a Reliable Electronic Contract Manufacturer There are several important aspects to keep in mind while choosing a reliable electronic contract manufacturer. These include environmental considerations, certifications, and the cost of materials. It is important to find a manufacturer with experience in the field, as well as a good reputation in the market. Environmental considerations One of the most important aspects of choosing a reliable electronic contract manufacturer is the environment. A good electronics contract manufacturer will always consider the environment when developing their products. As a result, you should always seek a manufacturer who is Restriction of Hazardous Substances (RoHS) compliant. By doing […]

PCBレイアウト時のデカップリングコンデンサの配置と取り付け方法

How to Place and Install Decoupling Capacitors During PCB Layout Decoupling capacitors are components used to reduce high-frequency noise and electromagnetic interference in a circuit. They can also provide power to an IC. This article will discuss the placement guidelines for these capacitors. By following these guidelines, you will be able to design a circuit with lower costs and less risk of manufacturing errors. Reduces high-frequency noise in power supply signals Noise in power supplies can negatively affect the performance of a device. This unwanted energy is often generated by high-frequency power conversion switching circuits. Noise can also be radiated from wires or PCB traces. Several practices can help minimize […]

スルーホールプラグ用ビアカバーオイルのセッティング方法

How to Set Up the Via Cover Oil for a Through-Hole Plug You may be wondering how to design a via cover oil for a through-hole plug. Well, the good news is that there are a number of ways to do it. There are several important factors you need to take into account. These include the design of the plug, the type of oil you use, and the type of via you need. Through-hole plug oil The first step in setting up a through-hole plug is to drain the old oil from the system. To do this, remove the stock plug or filler cap. This will speed up the process. […]

リフローはんだ付けとウェーブはんだ付けとは?

What is Reflow Soldering and Wave Soldering? Reflow soldering is a process that uses a reflow oven to melt solder paste onto the components’ pads. It works well for surface mount components, which will naturally straighten out of the way when the solder is melted. However, this method is more time-consuming, and is expensive. Issues with reflow soldering Wave soldering is a faster soldering process than reflow soldering. Reflow soldering is ideal for mixed-assembly PCBs with THT or DIP components. But wave soldering can cause bridging if solder flows over the solder mask dam. And reflow soldering temperatures are higher for a longer period, so board thermal characteristics are important. […]

PCB設計における配線効率の改善方法

How to Improve Wiring Efficiency in PCB Design If you’re wondering how to improve wiring efficiency in your PCB design, you’ve come to the right place. This article will cover topics such as using a common ground on your PCB, using a copper-coated power layer and using 45-degree angle traces. It also discusses using software simulation packages. Common ground on a PCB A common ground on a PCB is an important design feature for electrical circuits. In the absence of common ground, signals may not return to the source properly. This is due to the fact that different ground potentials in different parts of a circuit cause current to bounce […]