Category Archives: Quality


Jun10
PCB rework: Selective solder mask removal by laser

post on June 10, 2015

As an engineer in the electronics manufacturing industry, have you ever encountered the need to rework a printed circuit board (PCB) to remove the solder mask? If so, how did you approach this problem? Traditionally, the solder mask is manually … Continue reading →

Manufacture, Quality     WorkingBear    Views (12,516)     comment (0)

Jun03
TQRDCE Performance Expectations and Review

post on June 3, 2015

This is an example that implement TRQDCE form for vendor survey. TQRDCE Introduction: The company’s approach to establishing and maintaining long-term working relationships involves creating and monitoring mutual performance expectations and measurements. The use of performance metrics, constructive feedback, and … Continue reading →

Manufacture, Quality     WorkingBear    Views (25,058)     comment (0)

May27
Improve BGA Solderability By Partially Increasing Solder Paste Volume

post on May 27, 2015

Improving the solderability of BGA (Ball Grid Array) packages is always a big challenge for the SMT (Surface Mount Technology) process. Fine pitch BGAs (with a ball pitch less than 0.8mm) are particularly difficult to solder onto the PCB. Additionally, … Continue reading →

Design, Manufacture, Quality, Soldering     WorkingBear    Views (11,730)     comment (0)
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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 (8,378)     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 (25,565)     comments (8)
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