In the recent memory industry, the development direction of HBM (High Bandwidth Memory) is shifting from “stacking more layers vertically” to “expanding the die horizontally (wide die design).”Traditional 20+ stack HBM structures face limitations in thermal behavior, power efficiency, and yield, prompting a new strategic transition. What Is Wide HBM? Definition Wide HBM refers to … Read more
Introduction: Why Glass Wafer Is Gaining Momentum In recent years, glass wafers have become a hot topic in the semiconductor industry.While silicon has long dominated as the standard wafer material, glass substrates are now emerging as a strong alternative — especially in advanced packaging, MEMS, and optical sensor applications. The reasons are clear:Glass offers excellent … Read more
How the Four-Point Probe Reveals Grain Boundaries in Metal Thin Films In semiconductor R&D and production environments, the four-point probe is often seen as a quick tool to measure sheet resistance (Rs). But this underrated instrument has far more to offer.When properly interpreted, Rs data can expose insights into material microstructure, grain boundaries, and even … Read more
In semiconductor packaging, underfill plays a critical role in reliability. But have you ever wondered how the “dam” structure around it affects the detection of voids using C-SAM (Confocal Scanning Acoustic Microscopy)? Let’s take a closer look. What Is a “Dam” in the Underfill Process? In flip-chip packaging, a “dam” is a physical boundary—typically formed … Read more
If you’ve been following the semiconductor industry lately, you’ve probably heard the term “3D semiconductor” quite often. The era of merely arranging transistors on a flat plane is gradually ending, and stacking structures vertically has become the new standard. However, to achieve this intricate 3D architecture, there’s one essential process: Cryogenic Etching. Why is Cryogenic … Read more
If you’re involved in semiconductor processing, you’ve probably come across the term “Plating” more than once.But what exactly is the plating process, and why is it so essential—especially when it comes to copper wiring in semiconductors?Let’s break it down in simple, practical terms. What Is the Plating Process? In the semiconductor world, Plating refers … Read more
Hi there! 👋When we think of semiconductor photolithography, our minds often go straight to exposure and etching—the “cool” stuff. But have you ever stopped to consider what happens after all that patterning is done? Let me tell you: there’s one more essential step that often gets overlooked—the strip process. And believe me, it’s more than … Read more
If you’ve ever looked at your wafer after metal patterning and thought, “Why the hell does it look like a topographical map?”You’re not alone. Many engineers instinctively blame the plating process when they see wavy or bumpy metal lines.But in reality? The issue often starts way upstream.Let’s break it down. 🔍 What Does a “Wavy” … Read more
In today’s cutting-edge semiconductor and display industries, glass wafers are far from just simple transparent substrates. Their ability to transmit light accurately—known as transmittance—is a critical factor that can make or break product performance. Why Transmittance Matters More Than You Think Whether it’s for optical sensors, display covers, or solar cells, the efficiency and quality … Read more
In the world of semiconductors, not all wafers are created equal.What really separates a high-performance chip from a mediocre one? You guessed it: doping concentration. Today, we’re diving into the doping process, what happens when doping concentration changes, and how to accurately measure it using tools like the 4-Point Probe and Ellipsometry. What Is Doping … Read more