Hardware Reference
In-Depth Information
time. However, not all parts can withstand a wash cycle. Does your design contain
parts that cannot be washed?
Consider how the end device will be tested. Where are the test points? Is program-
ming required? Do you have to take it outside to get a GPS lock? How fast is the
test procedure?
Is this a kit—that is, will the user put the parts together? Does it require multiple
pieces, such as a board + USB cable + screws?
Do printed materials need to go in the box?
Are you shipping to the European Union? Do all the components need to be RoHS
compliant? Do all the components need to be child friendly?
Is this design double-sided? That doubles the manufacturing cost, but is a tradeoff
that is often made to reduce PCB size.
Can the reflow oven handle and not damage the parts on the double-reflow side?
Consider the PCB panel's overall width. Will it fit in the pick-and-place machine?
Will it fit on the conveyor belt of the reflow oven?
Can the part footprints be optically inspected easily during the automated optical
inspection (AOI) step? Can the AOI machine recognize 0603 versus 0402 compon-
ent footprints?
Troubleshooting
Is your product something that can be manufactured in the first place?
Are your parts readily available?
Did you convert your files into formats the factory can use? (Do not rely on the
factory to perform this conversion for you.)
Can the manufacturer correctly read the files you've sent?
Do you require precision thin-wall machined plastic or complicated multipart injec-
tion molds that are hard to make?
Are your traces too small or too close to the edge of the PCB?
Did you include a centroid file for assembly? Remember: It is your responsibility
to ensure the manufacturer has the correct combination of files to make your
product.
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