1. Individualized Analysis in PCB Production:

• Due to variations in production lines, equipment, and potion systems, targeted analysis and solutions are essential based on specific products and situations.
• Outlines three common causes of issues for reference.

2. Electroplated Nickel Layer Thickness Control:

• Highlights the surprising link between blackened gold plating and the thickness of the electroplated nickel layer.
• Thin electroplated nickel may result in a whitish or black appearance.
• Recommends checking and maintaining a nickel layer thickness of approximately 5 µm.

3. Electroplated Nickel Tank Potion Status:

• Emphasizes the importance of well-maintained nickel tank potion for preventing issues.
• Neglecting carbon treatment may lead to flaky crystals, increased hardness, and brittleness, causing blackening of the coating.
• Encourages careful examination of potion status, comparative analysis, and timely carbon treatment.

4. Gold Cylinder Control:

• Stresses the significance of maintaining good potion filtration and replenishment for gold cylinder control.
• Key points to check include supplement levels, pH value control, and conductive salt.
• Suggests using AA machine for impurity analysis and margin potion status evaluation.

5. Company Introduction – Wellcircuits:

• Introduces Wellcircuits, a manufacturer specializing in high-precision circuit boards.
• Offers various products, including HDI, thick copper, backplanes, rigid-flex, buried capacitance, and Golden Finger circuit boards.