日本語
I've been asked to implement QR codes on the blank PCBs we make, directly on the PCB, no sticker.
I don't even know what scanner they plan on using yet.
Is it better to have soldermask openings over exposed copper (enig finish), or over bare PCB material? I'd use silkscreen but I've noticed even when I ask for LPI it often comes back splotchy like an old old old school silkscreen. So I can't rely on that.
I have no clue what size I can get away with. The minimum of 15x15mm is already enormous for the kind of PCBs I make.
Data matrix might be better?
Has anyone done this?
- Comments(1)
A****min
Jun 27.2019, 17:37:15
We have products both with and without copper underneath the green solder mask. As already mentioned, avoid silk screen as the repeatability is poor for larger areas. Instead of the old mesh pattern you can get lines with LPI.
Make sure the DMC area + 1 mm frame is free from vias and try not to place any large solder pads close to it. Vias can be interpreted as dots and large pads can have an excess of flux that can distort the DMC.
