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GENERATING GERBER AND DRILL DATA FROM SCANNING
1.0 SCOPE OF WORK
The following
statement of work will describe the type and composition of data
that the customer will receive from Precision Images, LLC as a
result of scanning a supplied media.
Section 7 of this document
allows the customer to specify their requirements if they are not
met by our standard output as described in section 3.0, 4.0 and
5.0.
2.0 OBJECTIVE
To provide data
that is:
-
Dimensionally accurate whenever possible.
-
Faithful to the original in regard to features sizes and
connectivity.
- As
CAD-like as possible for ease of DRC and editing.
-
Manageable in regard to file size.
3.0 COMPOSITION
OF DATA
Gerber data:
-
Artwork will be scaled to print , if supplied.
- We
will attempt to snap CAD artwork to grid.
- Pads
that are associated with dimensioned details on print (if
supplied) will be positioned accurately.
- Pads
will be flashed wherever possible. Complex pads will be filled.
- Pads
will be registered from layer to layer.
-
Conductors will be single line draws where possible.
-
Copper areas will be filled.
-
Trace widths and pad sizes will be consolidated into groups of the
same size on a given layer. (ex: .010 / .020 / .050 as opposed to
.009, .010, .011 / .019, .020, .021 / etc.)
- The
width of a trace will be uniform for it’s entire length if that
was the intention of the original design.
- Hole
centers will be removed.
CONTINUE
COMPOSITION OF DATA
-
Images, except for crop marks outside the circuit’s parameter,
(reduction dimensions, targets, drawing formats, notes, etc.) will
not be included in our data unless specifically requested by the
customer. Refer to Section 6.0 to make any exceptions.
- On
hand-taped artworks the unused built-in neckdowns (“dog bones”) in
chip patterns will be removed.
-
Silk-screened component outlines will be single line draws if
possible and text will be filled except in the case where text is
touching the component outline, then both will be filled.
- Some
plane layers may require the data to be a composite. We
will supply at most, a double merge composite (pos – neg – pos).
-
Plane layer polarity may be different than the original. It will
be scanned the most efficient way in regard to ease of editing the
data and file size. In general, most planes will be negative and
combination plane/signal layers will be positive.
-
Files will be viewed and oriented same as the mechanical / drill
drawing, if supplied.
Drill data:
-
Dimensioned holes will be located according to print, if supplied.
-
Holes will be registered to artwork.
-
Drills are optimized for shortest travel path.
4.0
DATA
FORMAT
Artwork layers
will be output in the RS274X format with the following parameters:
decimals – 2.4,
leading zeroes suppressed and absolute coordinates.
Drills will be in
ASCII Excellon 2 format with the following parameters: decimals –
2.4,
trailing zeroes
suppressed and absolute coordinates.
5.0
TRANSMITTAL OF DATA
All files will be
compressed into a Zip file format and sent as an attachment to an
e-mail
message. Original
media will be returned to the customer, as requested, via UPS
Ground service.
CUSTOMER
REQUESTS
In order to help
us do a better job for you, please provide as many of the
following items as possible:
(please check off
if you are sending)
Click here for printer-friendly version
and fax to 727.541.5888
___ Mechanical
drawing.
___ NC drill file.
___ Other layers
of artwork that might be used for reference.
___ Identification
of any layer that is not already identified on the film or print.
___ Identification
of any compensations or progressions (flexible circuits) that are
incorporated into the artwork being supplied.
___ Permission to
cut apart original films.
___ An additional
board if gerber is to be created from bare board.
___ Permission to
remove mask and silk from bare boards if necessary.
E-mail
address that data is to be sent to:
6.0
CUSTOMER
EXCEPTIONS / OPTIONS
Please use the
space below to take exception to any item in section 3.0 or to
specify any additional work you would like done:
1. Coupons are
required (if present)? ____ Yes ____ No
If there is more
than one coupon, please specify which one(s).
2. If you have
supplied a drill file, would you like:
___ the artwork snapped to the drill
___ the drill snapped to the artwork
3. ___ Generate a soldemask
4. ___
Return original artwork.
5. Specify
shipping method if UPS Ground is not
acceptable:
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