Notes on PCB production at home
This page will be a collection of references for the production of printed
circuit boards (PCBs) for home use.
I also need a notepad for my experiments in this area...
Values and measurements
- 1.5L etching solution in bubble machine: room temperature to 40 degC
takes about 20 minutes.
- Bungard photo material, "NaOH free"/"Feinaetzkristall": 1min exposure,
- Tin plating with "Rosol 3" and hot air station: 240 degC melts the tin,
but leaves FR4 ''quite'' unchanged. Stopping right after some puff of
smoke has been released from the paste, before the whole tin has melted,
and washing off the rest with water, leaves a well solderable coating on
the copper, but does not shine like a professional tin coating.
- Should tin coat only SMD pads, and leave the rest to "Kontakt-Chemie
- Drill bits: 0.8mm (1.0/1.1mm for pinheads)
- Soldering THT 260 degC, SMD 300 degC (http://www.microcontroller.net
says 300-340 degC for everything...) (this is non-ROHS data)
- Solder wick is good at 300 degC, even better when soaked in a drip of
- Minimum trace width: 0.03 inch
- Note for finding out the stability of PCB chemicals: Produced the
current solutions on 26. Feb 2009.
- Rework guides
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