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Toll Free 888-230-6874
X 121
Don Dodd
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We do complex SMT designs. Typical
designs are captured in Futurenet, Orcad, PowerLogic or ViewLogic schematic
capture programs. Placement is in PADS PowerPCB, with routing by Specctra
shape-based super autorouter.
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Our typical work flow begins with a
schematic. We either generate one for you or receive one from you at our ftp
server. We maintain our own firewall protected T-1 line and
server farm. We accept most CAD/CAE formats. We can convert
schematic data to a PCB file based on component data sheets using industry
standard components from our extensive library of technical books, CD-ROMS,
and on-line information from our network of computers.
 This
shock recorder module is used on
forklifts.
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Another important part of the design
process are the mechanical items. Our mechanical
engineering department can create the mechanical drawings for you, or you
can supply them. Mechanical drawings can be accepted in Solidworks, Data
Exchange Format (*.DXF), AutoCAD 10/12/14 (*.DWG), Windows Metafile (*.WMF),
Graphics Interchange Format, .JPG, and many others.
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We will generate a netlist for your
review and comparison to your schematic. Of course, our engineering
department will take on this task if you prefer. The netlist, parts
sizes, and database is then sent to manufacturing for pick and place
coordinating.
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Placement
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Fiducials - For SMT layouts we
will place a fiducial
in all four corners of the PCB about .125" to .250" in from each
edge. Our standard fiducial is a solid 40 mil circle on the copper layer with
a 60 to 80 mil solder mask opening. If the assembly has SMT components on
both sides, we will place the fiducials on both sides.
Polarized Components - All polarized components (Diodes, Capacitors, ICs,
etc.) will go the same direction if possible. If components must be going
different directions, we will use a silk screen outline that can be seen when
the component is in place. We will use outlines where polarity is easily
seen.
Double Sided Boards - For mixed
technology PCBs we try to place both SMT and Through Hole components on the
same side. For PCBs where you intend for the SMT parts to be wave soldered
with the Through hole parts, placing multi-leg SMT components on the solder
side requires advanced layout skills and non-standard SMT footprints to
assure the best quality. For two sided SMT assemblies, try to place all the
ICs and fine pitch parts on the same side.
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Since we do extensive mixed analog and
SMT design work, we have the experience to place components for both
electrical operation concerns, ease of assembly, and servicing. When a good
placement has been approved, we will then route the board either manually or
automatically.
Finally, the silkscreens
will be arranged for manufacturing ease, and copyright information
added along with tooling targets.
Panels - We will panelize
the PCB. We can place the PCBs in a panel that will increase production
efficiency, reduce PCB material cost, and assembly time.
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This is board 1 of a 2 board set in
another shock recorder line. |
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Here is a water meter with telephone
interfaces and 16 to 24 meter capability. The customer is a major electric
meter manufacturer.
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AutoRouting
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We also accept PADS Pre-Placed
job files for AutoRouting. You must have a design database in an
acceptable format. The design database should include the following:
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All parts should be placed
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All pad stacks should be defined for
all parts on the board.
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Via sizes should be defined
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Any pre-routes must be routed
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Specify any special routing or
high-speed design rule requirements
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Call
us Toll Free 888-230-6874 X 121