LPKF ProtoMat 93s Manual
40
The milling depth must be set as large (deep) as possible in all cases. If only the
extreme milling cutter tip (<0.2 mm isolation) is used, the tool wears more quickly
than with deeper drilling.
The LPKF micro-cutters can be used to produce even smaller isolation channels,
but their service life is about 10% less than that of the above-mentioned universal
cutters. Attention: do not confuse micro-cutters and universal cutters - both of
them can only be recognized using a microscope.
A cutter has been specially designed for HF-technology. It produces a rectangular
cross section.
ca. 0.2mm
ca. 0.075mm
Cu
ca. 0.1mm
ca. 0.25mm
FR4
Milling channel of LPKF universal, micro- and HF-cutters
.
For further notes see chapter "Practical tips".
For the advantages and disadvantages of various materials, see the section
entitled "Base material".
After machining, the PCB has to be cleaned. This can be carried out either in a
brush machine or alternatively manually with board cleaners (LPKF accessories).
In either case, the PCB must be rinsed thoroughly with water to remove any
copper dust produced by brushing.
After rinsing, the PCB must be dried thoroughly (air drier) and then protected
against oxidation by a solder varnish.
