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Author Archives: WorkingBear
Mar21
Electronic Product Burn-In and Run-In: What They Are and Their Pros & Cons
In the early days, when electronic component design and manufacturing were still in their infancy, burn-in (B/I) was widely used to screen out defective products. This process helped eliminate early failures before products reached customers, reducing the risk of complaints. … Continue reading
Mar20
What is Tg (Glass Transition Temperature) and Its Role in PCBs?
Glass Transition Temperature (Tg) is one of the most important properties of all plastic and epoxy resin materials. In fact, the Tg value is also an indicator of the quality of the fiberglass fabric used in PCB manufacturing. However, compared … Continue reading
Mar13
What is CTE (Coefficient of Thermal Expansion)? What is α2-CTE? How Does CTE Affect PCB Quality?
CTE (Coefficient of Thermal Expansion) refers to how a material’s geometric properties change as its temperature rises or falls due to thermal expansion and contraction. In practical applications, CTE is divided into two main categories: Coefficient of Linear Thermal Expansion … Continue reading
Mar06
What is the Popcorn Effect in PCBs and Electronic Components?
The Popcorn Effect in PCB and electronic components refers to the delamination (board cracking) or formation of bubbles when exposed to high temperatures during soldering. This phenomenon is similar to how popcorn pops—it happens because of trapped moisture inside. When … Continue reading
Feb27
What Is Solder Mask (S/M)? What Is Its Purpose on a PCB? Why Is It Usually Green?
In discussions about printed circuit boards (PCBs), you’ll often hear the term Solder Mask (S/M). But what exactly is a solder mask, and what role does it play in a PCB? Some also refer to it as solder resist. What … Continue reading
