This will take you to raw blank
material
costs with RISTON 'AE' Coating
but for RISTON
COATED FR-4
just continue reading on . . .
DUPONT
RISTON (copy right trademark)
COATED COPPER CLAD LAMINATE.
................................................
"A.E."
Coated RISTON Copper Clad FR-4 Laminate is
the most used product in serious circuit board production
factories all over the world, also used by hobbiests
wishing to make circuit boards with a small amount of
equipment from a Negative > UV Exposure > Develop > Etch etc
The use of a 'Negative'
for circuit board production by far
out-weighs any use of a 'Positive' to make circuit boards
for a zillions reasons with not enough space to print here,
with the bottom line that the Negative method is regarded as
the 'professional' method mostly used by ALL.
This will take you to raw blank
material
costs with RISTON 'AE' Coating
but for RISTON
COATED FR-4
just continue reading on . . .
MSDS
Sheets for RCS Riston Developer
MSDS Sheets for RCS Riston Stripper
The Panels we make
available are usually 1/16" (1.6mm) the
most common Single Sided & Double Sided as well as some
1/32" (o.8mm) and other materials on request.
RCS (Design/Radio) sells this product ONLY in these sizes and if
you want a few smaller sizes, then go to JAYCAR
etc
but, we do offer a free cutting service for our 18" x 12"
panels into any arrangement you may easilly use.
Info. about better
exposure controls
more misc info follows
We (in the circuit
board industry) all use RISTON AE
which is a shortened term by DUPONT (copy right product name)
RISTON (another well known copy right product name)
A.E. stands for 'AQUEOUS EXPERIMENTERS', meaning it
is a water based developer solution (after U.V. Exposed)
and oddly enough, because of it's professional acceptance
there never was an 'AQUEOUS Professional' developed or sold.
I have no doubt, many others make a similar product
but we all (for ease) all talk the same name in conversation.
Here at RCS Radio
we have been using this product since 1977
without any problem of any sort from safety or quality
Many retail outlets (Circuit Components etc and others)
have made this product available to the general public
but as circumstances have changed for public purchase
we have decided to make the product now more available.
The Raw Stock arrives in 4' x 3' sheets, it
is then cut
into 8 panels of a (CNC) common size, 18" x 12", then it's
Water Washed Rotary Scrubbed, Laminated, Trimmed,
Black 125um Plastic protected & wrapped ready for you to use.
The main 2 reasons
for using 'RISTON' are to ensure accurate
repeatable copies can be made from a CAD Printout to a
Negative etc, but the best reason to use this method
is the track width sizes that it can easilly reproduce
10thou tracks to go between any I.C. pads on a common
100thou pad to pad spacing and from what I have seen of the
'iron on sticky pad transfers' method , please, stop dreaming
because what I saw and looked at, with 2 simple words
'NO Linerarity' if you try to 'pin' & 'drill' then it is 'inaccurate
registration'.
The Rotary Water Scrubber uses
a 'filtered looped water pump'
and MUST be done prior to Hot Roller Riston laminating
so as to remove 'finger prints, oils & burrs' and in general, present
a mildly 'roughed up' surface for the Blue
Riston Laminate roll
with a 1 thou Oxygen barrier to be 'heat/fused' properly onto
the now very super clean copper laminate sheet.
For years now, we have used a Hot Shoe Laminator for our own
use, but we recently installed a supposedly better DUPONT unit
(that can do volume) and it is known in the industry as a Hot Roll Laminator.
In some of the States in the USA, (colder climates) we are aware
that the RED Riston
was banned, owing to a 'possible carcigenic link'
if used in closed, poorly ventilated laminator & developer rooms
I was alerted to it some 20+ years ago when I saw a common
sheep drench (for worms) as the main ingredient of processing, M.E.K.
and that, many years ago, made me NEVER use it for board making.
end of
RISTON page
oh, by the way, Industrial Electronics is gazzetted
by law, to remain
IMPERIAL that is thou, inches, feet etc, as well as floppy disc
drives etc. ( plus discs ) , Computer monitors etc and our
raw material arrives in 4' x 3' (4 feet x 3 feet) sheets,
also Integrated Circuits are on a 1/10" (100thou pad<>pad)
spacing, even most new surface mount comps are expressed in
blocks of 10 thou units, (a 1206 = 120thou x 60thou but for
the lesser educated non-tech persons, in Domestic Electronics
they express TV sets in 'cms' and so a 68cm TV is a
26" (inch) monitor, confusing, you betcha, and it gets worse
and when you see odd ball metric dimensions of distances
like 12.7mm or 2.54mm from well known component suppliers
cataloques, then realise you are being advised by someone
you could be a dress designer or cake decorator and if it is not
in Imperial, roughly converted to Metric, and if you design
a CAD artwork using metric dimensions, then prepare to
re-make the circuit boards again, as they will NOT permit a
real commercial automatic 'pick and place' auto place
to commercially make your masterpiece.
real end of RISTON page
