Category Archives: Quality


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

post on May 5, 2015

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 →

Manufacture, Quality, Soldering     WorkingBear    Views (6,870)     comment (0)
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May01
Why Do Screw Bosses Crack After Mold-In Screw Inserts? Common Causes and Solutions

post on May 1, 2015

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 →

Design, Manufacture, Plastic, Quality     WorkingBear    Views (20,699)     comments (8)
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Apr24
How to select a good actuator design for right angle connector?

post on April 24, 2015

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 →

Connector, Design, Manufacture, Quality     WorkingBear    Views (4,387)     comment (0)

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

post on April 23, 2015

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 →

Design, Keypad, Quality     WorkingBear    Views (5,841)     comments (2)
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Apr22
The Importance of Dimples in Metal Dome Keypads

post on April 22, 2015

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 →

Design, Keypad, Quality     WorkingBear    Views (6,573)     comment (0)