What are “tin whiskers”?

Tin whiskers are crystals that grow on the surface of a tin coating (on a printed circuit board, plug, drawer, etc.). If these crystals (they look like a cat's whiskers …… hence the name whiskers) become too long, a short [...]

2020-09-29T13:07:07+02:0029 September 2020|Categories: |

What does RoHS mean?

RoHS (Restriction of Hazardous Substances) means the prohibition of harmful substances. This means that some toxic / harmful materials may no longer be used in electronic equipment (think of lead, mercury, chromium, cadmium, etc.). These substances are dangerous for the [...]

2020-09-29T13:06:35+02:0029 September 2020|Categories: , |

What do they mean by “fine pitch components”?

Fine-pitch components are SMD components where the leads are spaced very close together. IPC calls the SMDs fine-pitch from a center-to-center (lead distance) of 0.65 mm and smaller. There are also ultra-fine-pitch components, which have a center-to-center distance of 0.3 [...]

2020-09-29T13:06:01+02:0029 September 2020|Categories: , |

What causes the PCB to warp?

The warping of printed circuit boards can be caused by incorrect stacking of the prepreg layers at the printed circuit board manufacturer. This is discussed in the CID/CID+ training.

2020-09-29T13:09:48+02:0029 September 2020|Categories: , |