What is The Secret of Color in PCB Solder Mask (Part 2.)

Today, we will learn 10 key reasons behind green's PCB supremacy.

Green color's reign over the PCB landscape, commanding more than 80% share, is no accident. While our previous issue outlined its mainstream status, this article delves deeper into the 10 rational advantages that underpin this enduring phenomenon.

1. Mature and Stable Process: The formulation for green solder mask has been standardized over years. Manufacturing equipment and chemicals are optimized for green, ensuring stable performance during development and curing, with strong adhesion and less risk of peeling.

2. Superior Inspectability: Both human eyes and optical equipment rely on contrast for inspection. The green background provides a sharp contrast against the yellow copper traces, making defects like scratches and misalignments easy to detect. This is particularly friendly for manual visual inspection, reducing operator fatigue.

3. Higher Manufacturing Precision: Green ink allows for finer line resolution and smaller errors during exposure. For high-precision designs, comparing with red and blue, green holds a natural advantage over other colors.

4. Excellent Physical Properties: Green ink demonstrates superior performance in critical processes like "via tenting," offering better filling capability and reliability to prevent via clogging.

5. Significant Cost Advantage: As the absolute market mainstream color, the massive procurement scale of green ink reduces production costs, making its unit price considerably lower than other colors. It's the best choice for cost-sensitive projects.

In our next article,we will learn other 5 advantages of the green color on PCB solder mask.