Category Archives: Soldering


Jan04
What is Step-up & Step-down Stencil? Selective Solder Paste Volume Increasing Solution

Today, the SMD parts become smaller and smaller. Their sizes can be developed to 0402, 0201, and even 01005 (Note 1). Moreover, the pitch between the pins of a common IC (integrated circuit) is shorten to fine pitch of 0.5mm, … Continue reading

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

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

Jul01
Why thinner PCB will need carrier for reflow process?

As the career of Manufacturing Process Engineering(MPE), WorkingBear always find there is tug of war between Designer, Marketing and Manufacturer. The Marketing always like the design be thin, sleek, and modern looking. The designer always think fabrication is easy. The … Continue reading

Jun17
Selectively increase solder paste volume solutions

Why need to partially increase the solder paste volume? This is in order to meet current smaller and thinner electric component design, the stencil thickness is made as thin as possible to accurately control the tiny solder paste which print … Continue reading

May27
Improve BGA solderability by partial increase solder paste volume

How to improve the BGA (Ball Grid Array) package solderability is always a big challenge for SMT (Surface Mount Technology) process. Especially for the fine pitch (ball pitch less than 0.8mm) BGA is more difficult to be soldered on the … Continue reading