Electronics Forum: board swelling (Page 1 of 1)

Solder mask peel from traces, post wave solder. Etchant residue?

Electronics Forum | Sun Jun 29 07:31:03 EDT 2014 | vitrost

Hi, We had experienced very similar issue on boards of a certain PCB manufacturer. Field experiments showed that the solder mask of this manufacturer is prone to swelling and peeling after it was in contact with our water-based flux. When you switc

Re: Reflow Oven

Electronics Forum | Thu Jun 15 21:51:17 EDT 2000 | Dave F

Jeff: You're correct �7.1.3 of ANSI J-STD-001C states " Drying / Degreasing states the assembly may be treated to remove moisture and other volitiles." We don't bake "FR4" for love nor money. The archive are littered with threads along this line.

Re: DFM / DFT information

Electronics Forum | Thu Jul 13 22:20:38 EDT 2000 | Dave F

=10 mils larger than lead 3 silk screen legend text weight >=10 mils 4 pads >=15 mils larger than finished hole sizes 5 place through hole components on 50 mil grid 6 no silk screen legend text over vias (if vias not solder masked) or holes 7 so


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