Yup FR4. The hard one 1.6mm thickness. Nung pumunta ako Alexan nakikita ko sa glass display nila ung color brown (Raon branch, the one near carriedo). Then they had some in a green foil plastic bag. Ung pang photo UV nila. When I was in college (Mapua). We used those boards din but I assumed that those where phenolic boards din. But perhaps they have changed it or maybe I confused myself (It happens).
Now in deco they have this stand there na puro brown PCB boards (FR2 right?) ung pang display nila. So I assumed they don't have FR4 to begin with.
What I was looking for is un nga FR4 na walang photo, just plain copper on top. I got some imported from a German Supplier (TOPTRONIC) in Germany which have the ffg specs:
- 70microns copper thickness in contrast to the one I saw locally which is roughly 30microns. Meaning it is possible to put more juice in the conductors.
- 1.6mm (copper+fiberglass) para matibay. The local ones I tried before the plantsa method in the older days. But usually ung ibabaw na copper clad nag bubulge if heated for too long.
- 160mmx450mm (Bigger one would have been better para isang setup lang sa makina to make multiples of the same board if required)
- Double Sided
- Euro 3,20 = roughly 200php (Expensive due to its size. It's the biggest I found available locally in Germany)
I also bought a variety of PCB sizes (single,double,small and medium sized). They sell them pero kilo at Euro 5,49 roughly PHP 340. That's roughly 10 pieces.
I think I got it cheaper since it is being shipped together with the machine nakatipid sa shipping cost. But if they do have it at a cheaper and more affordable price in alexan than in europe then this is good news.
Designator markings. I might just simply try use laser for this (Single side only) or an ink pen on my plotter (If required).
For through hole platting maraming paraan.
-Solder it with a wire
-Rivets (I have seen some in china but not have considered it yet kase manu manu ata ito)
I would like to avoid electro platting as much as possible. I have tried before chrome platting before at home, somewhat successful but all that I comment is that it is very messy and not good to the environment. The same goes with the etchants and the sorts for soldermasking. It will be hard to obtain a proper business license to manufacture PCB through etching methods as this is bad for mother earth.