Category Archives: Quality


May05
Why Burn/In(B/I) still cannot screen out the DDR soldering fail?

We recently encountered a soldering issue with a DDR memory BGA (Ball Grid Array). The problem identified was HIP (Head-In-Pillow) — two balls with non-wetting under the BGA package were affected. To investigate, we sent someone to the field to … Continue reading

May01
Why Do Screw Bosses Crack After Mold-In Screw Inserts? Common Causes and Solutions

This story is long-standing memory, but WorkingBear is documenting it here for reference and as a learning record. One day, we received a customer complaint regarding a product with a plastic housing that had cracked. The issue was visually striking, … Continue reading

Apr24
How to select a good actuator design for right angle connector?

As my personal feeling that Right-angle FPC ZIF connector is really more easily to use than Drawer type of ZIF connector. Even right-angle connector is good but do you know how to select a good design of this kind of … Continue reading

Apr23
How We Solved the Keypad Sensitivity Issue by Switching to a 3-Dimple Metal Dome Design

In my previous post, I mentioned that our company once used metal domes without dimples as the keypad contact solution—similar to what’s used in some cell phones. However, we soon ran into a problem: the keypads were not sensitive enough … Continue reading

Apr22
The Importance of Dimples in Metal Dome Keypads

Recently, our company introduced metal dome technology as a contact solution for rubber keypads, a trend also seen in many cell phone keypad designs. The advantages of using metal domes include a better key press experience, extended lifespan, and improved … Continue reading