LPKF ProtoMat 93s Manual
46
Attention! Machining Teflon might produce hazardous gases ! Protect Teflon
from overheating!
The following material has proved particularly successful as material for HF and
microwave applications: RT/Duroid types 5870, 0310 diel and 001 10 oz electro-
deposited copper 2 sides.
A drilling base is indispensable for all machining processes on PCB material. With
it, PCBs cannot be drilled through without damaging the machine. The drilling
base can be made simply of cardboard and should be 2 mm thick.
7.11 Cleaning the PCB
Before components are mounted, the finished PCB must be thoroughly cleaned.
This can be carried out manually or in PCB brushing machines.
If cleaning by hand, the PCB is placed on a flat support. The board is brushed in
the direction of the conductor paths with wet board cleaner (e.g. LPKF board
cleaner PAD). The purpose of the brushing is on the one hand to remove the layer
of oxidation and on the other to remove swarf in the isolation channels. After
brushing, the PCB must be free of any metal particles. From now on, the board
should only be held by its edges and with gloves. The board should now be rinsed
under running water and then dried with an air drier. Important: never use
compressed air as the oil particles it contains can cause problems later on. After
drying, both sides of the board are coated with solderable lacquer.
