I just ordered 5 boards from a popular Chinese PCB manufacturer and (for the first time ever with this manufacturer) some SOD-323 diodes and their pads and adjacent tracks were peeled off out of the box (1 or 2 per board in 3/5 boards.)
I think it's a QA/assembly issue, but I also think my pads may be too small.
I started "stress testing" the boards and, sure enough, with a modest amount of force I could take apart the diodes.
I also tried to peel off the other components (just with my fingers, not tools.)
I failed with the STM32 and the crystal, but I was successful with 0402 capacitors and resistors.
Pad size for the diodes was about 0.65mm x 0.55mm (one of Kicad's default sizes; not the smallest but not the largest).
Track width is 0.2mm.
- Is this normal with PCBs in general, and with SOD-323 diodes in particular?
- What is the recommended pad size for something like a SOD-323 diode?
- What's a reasonable level of "physical resilience" that a PCB is expected to have? (I mean, I remember dropping my electronics more than time throughout my life.)