Category Archives: PCB/FPC/PTF


Oct01
Copper Defined vs. Solder Mask Defined pad design for BGA soldering strength

post on October 1, 2015

Since the electronic product design moves from desktop to portable devices, the manufacturer also make electronic component as small as possible to meet this popular trend. Besides, the PCB thickness also become thinner and the associated soldering pads on the … Continue reading →

PCB/FPC/PTF, Reliability, SMT, Soldering     WorkingBear    Views (24,512)     comment (0)
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Jul01
Why do thinner PCBs will need carrier for reflow process?

post on July 1, 2015

As the career of Manufacturing Process Engineering(MPE), WorkingBear has noticed a constant battle between Designers, Marketers, and Manufacturers. Marketers always want  thin, modern design that look thin. Designers think fabrication is simple, while Manufacturers want  strong, robust, sturdy assemblies that … Continue reading →

Design, Glue/adhesive/epoxy/underfill,, PCB/FPC/PTF, Process, Quality, SMT, Soldering     WorkingBear    Views (14,978)     comments (2)
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Apr22
HotBar FPC Design Notices

post on April 22, 2015

The HotBar soldering is a kind of selective soldering solution where connect two pre-fluxed, solder coated parts by pulse heating element, call a “thermode”, with proper temperature to melt the solder and re-solder. Applying a pressure and contacting on the … Continue reading →

Design, PCB/FPC/PTF     WorkingBear    Views (13,024)     comment (0)
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Apr21
Design Guideline for Flex cable(FPC) Trace Pattern

post on April 21, 2015

Many FPCB designers may not be well-versed in the manufacturing process and its limitations. Workingbear have often come across designs that don’t meet DFx requirements, where designers insist on their approach, leading to numerous quality issues during mass production. In … Continue reading →

Design, PCB/FPC/PTF, Quality     WorkingBear    Views (6,371)     comment (0)

Apr20
Screen-Printing on PET(PolyEthylene Terephthalate) notices

post on April 20, 2015

The PTF uses silk-screen to print the silver and carbon combination conductive inks on PET substitute to reach lower cost purpose as compare with FPC (Flexible Printing Circuit). Unfortunately, the screen-printing still has some ability limits. Especially that it has … Continue reading →

Design, Manufacture, PCB/FPC/PTF     WorkingBear    Views (7,378)     comment (0)
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