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Jun 18,2026
BGA Soldering Process and Reliability Analysis
Preface: As electronic products evolve toward miniaturization, portability, networking, and higher performance, increasingly stringent demands are placed on circuit‑assembly technologies and the number of I/O pins. Chip sizes continue to shrink, while the number of pins grows, posing significant challenges for manufacturing and rework. Traditionally, quad flat packages (QFP) were widely used in surface‑mount technology (SMT); however, the minimum pitch for such packages has been limited to 0.3 mm. At this pitch, leads are prone to bending, deformation, or breakage, which complicates SMT assembly processes...
Jun 18,2026
South Korea’s shipbuilding industry is firing up its “boiler” to dry out the “dampness.”
As Ko Jae-ho previously stated at the Korea Shipbuilding Association’s New Year gathering, global calls for the “greening” of ships are growing stronger, and international maritime organizations (IMO) are formulating and issuing regulations and standards aimed at reducing ship emissions, enhancing environmental protection, and improving navigational safety. These developments will drive a steadily increasing market demand for environmentally friendly, high‑efficiency vessels. Green ships are becoming the darlings of both the shipbuilding and shipping industries, and shipbuilders that proactively and actively adapt to this shift in the market…
Jun 18,2026
Summary of PCB (Printed Circuit Board) Knowledge
Introduction: A PCB, or printed circuit board, is also referred to as a printed wiring board. It is commonly abbreviated as PCB (printed circuit board) or PWB (printed wiring board). Made from an insulating substrate cut to specific dimensions, it features at least one conductive pattern and includes various types of holes—such as component holes, mounting holes, and plated-through holes—serving as a replacement for traditional assembly methods...
Jun 18,2026
In Meng Xiangkai’s view, 2012 was a pivotal year for the development of China’s general aviation industry. Following the issuance of relevant guiding policies by the state, significant efforts were made to open up low-altitude airspace. However, from a macro perspective, China’s aviation transport sector exhibits a pronounced “inverted triangle” pattern: while the domestic air transport industry is vast—indeed, comparable in scale to that of many global powerhouses—the general aviation sector remains remarkably underdeveloped, unable to adequately support national economic growth. A shortage of pilots is a key constraint...
Jun 18,2026
U.S. light-vehicle sales in March reached their highest monthly level since 2007.
In March 2013, U.S. light-vehicle sales totaled 1.45 million units, up roughly 3% year over year; first-quarter sales reached 3.69 million, a 6% increase compared with the same period in 2012. According to data from Autodata, U.S. light-vehicle sales in March amounted to 1,453,038 units, up 3.4% from 1,404,699 in March 2012—marking the highest monthly sales figure since August 2007, when they peaked at 1.48 million. In the first quarter...
Jun 18,2026
Many people still don’t fully understand the differences between HDI boards and conventional PCBs.
HDI boards, or high-density interconnect boards, are manufactured using a multilayer build-up process. The number of layers in the stack-up is directly proportional to the board’s technological grade—more layers correspond to higher performance. HDI boards are typically categorized into standard HDI (single‑layer build-up) and advanced HDI (two or more layers), and they incorporate cutting-edge PCB technologies such as stacked vias, electroplated via filling, and laser direct drilling. Conventional HDI designs often employ copper foil with a non‑glass‑fiber carrier; the reason for this choice is...
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