In the previous article of this packaging series, I introduced the chip-on-board process. Here, I will provide a brief overview of another “unassuming” process in semiconductor packaging—Underfill.In the semiconductor packaging system, Underfill is a very inconspicuous yet crucial process (in fact, every process is important…). Whether it is Flip-Chip, 2.5D CoWoS, or the latest 3D … Read more
What is PCB Conformal Coating? PCB conformal coating, also known as circuit board conformal coating or coating adhesive, is a specially formulated paint-like adhesive used to protect printed circuit boards (PCBs) and their associated equipment from environmental factors. It can form a protective film on the surface of the PCB, which has various protective functions, … Read more
2025-11-25 PM 12:32 Shenzhou-22 spacecraft has successfully launched again! Let us try to interpret the special requirements and response strategies of PCBs in the aerospace field. PCBs in the aerospace field: Beyond ordinary stringent requirements 1. The critical role of PCBs in aerospace missions PCBs play a key role as the “nerve endings” and “intelligent … Read more
In the field of industrial control systems, autonomy and controllability have become the cornerstone of national security and industrial safety. Faced with an increasingly complex international environment, China urgently needs to overcome the “bottleneck” problem in its industrial control systems. The launch of the Hualisi LKC series PLC marks a solid step forward for China … Read more
To address the issue of node overload and even failure due to resource constraints in the Industrial Internet of Things (IIoT) edge computing environment, the author proposes a fault tolerance method based on edge intelligence called SGAT-GAN (Sparse Graph Attention-based Generative Adversarial Network). This method integrates a fault prediction mechanism and utilizes Fault Embedding Encoder … Read more
In the reliability assessment of printed circuit board assembly (PCBA), the microstructure of solder joints, particularly the intermetallic compound (IMC) layer, is crucial for determining long-term performance. The IMC layer, as a product of the metallurgical bonding between solder and pad, directly affects the mechanical strength and electrical connection stability of the solder joint. Under … Read more
MQTT and CoAP are commonly used lightweight communication protocols in the Internet of Things (IoT) field, and they exhibit significant differences in design goals, application scenarios, and technical characteristics. Below is a main comparison of the two: 1. Transport Layer Protocol · MQTT: Based on TCP, it provides reliable transmission and requires maintaining a long … Read more
What is PCB Conformal Coating? PCB Conformal Coating, also known asPCB Coating or protective coating, is a specially formulated adhesive coating used to protect printed circuit boards (PCBs) and their associated devices from environmental factors. It can form a protective film on the surface of the PCB, which has various protective functions, thereby enhancing the … Read more
When we effortlessly browse the web, send emails, or watch videos, data is traveling at the speed of light between billions of devices worldwide. Behind this orderly process lies not magic, but a carefully designed set of rules—the TCP/IP protocol. It is hailed as the “foundation” of the internet and can even be considered the … Read more
Why Has “Reliability” Become a New Anxiety for Multi-Die Packaging? In the context of the semiconductor industry accelerating into the post-Moore era, multi-die packaging and heterogeneous integration technologies have become key paths to enhance performance and reduce power consumption. However, the complexity of these technologies has led to new reliability challenges. According to a recent … Read more
