Presentation from the 16th Open Source Hardware Users' Group Meeting held at the C4CC in London on the 23 February 2012. Event details at: http://oshug.org/event/16

1. From breadboard to
finished product
A tale of “DFM” and “CEM”
@OmerK / OSHUG 16 / 23 Feb 2012

2. omer.kilic.name

3. Concept
Product
Specification
Production
Design
Compliance
Revision Testing
Prototype
Test/Debug

4. Think different.

5. Functional Spec.odt

6. (cc) tiemposdelruido/flickr

10. Bill of Materials

12. README.txt
device.max gerbers
<date> - <revision>
Files included:
DEVICE.BOT - Copper bottom
...
thruhole.tap - NC Drill file
- Board outline is defined in top silkscreen, please route to border.
- Please enlarge soldermask pads to fit your clearances as necessary
- Please remove overlapping silkscreen segments on copper (i.e: silkscreen should not cover
pads)
- Mounting holes are specified as same pad size on drill and copper layers, these should be
non-PTH
For questions please contact:
<contact details>

15. Pay extra for “Electrical Testing”!
(Because you're worth it)

16. https://github.com/dren-dk/HAL900/wiki/Quirks-of-PCB-manufacturing-at-ITead

23. Lather, rinse, repeat.

24. Schematic
Layout Files
Bill of Materials
Assembly Drawing
Testing Procedure
Packaging Info
CEM

25. “
●
To supply all components and manufacture the PCB assembly as per
your latest BOM, our price is:
£X.XX each, based upon a single order for a quantity of X off units.
Delivery to be X weeks from placement of order.
Device programming or assembly testing are not included in the above pricing –
dependent upon cycle times, these operations would be charged extra at a rate of £X per
minute.
●(We would recommend the bare PCB to be panellised 2 up with a routed/scored breakout
and 10mm scrap all round.)
● One off charges of £X for PCB tooling and £X for SM stencil to be applied.
● Pricing includes SM assembly, conventional PCB assembly and AOI inspection of all units.
●All pricing is fixed for X days only from date of quotation.
●Payment terms are strictly X% of total value with order with balance due X days from date of invoice,
subject to prior acceptance of credit account.
●All quoted prices exclude VAT and delivery and lead times indicated are standard.

26. (cc) seeedstudio/flickr

27. http://www.ladyada.net/make/pogojig/

29. Concept
Product
Specification
Production
Design
Compliance
Revision Testing
Prototype
Test/Debug

30. http://en.wikipedia.org/wiki/Product_certification

31. Useful Stuff
● Glossary of Acronyms Relevant to Electronics Manufacturing -
http://www.smta.org/files/acronym_glossary.pdf
● Thoughts, experiences on realizing an idea, Ihsan Kehribar -
http://blog.kehribar.me/?p=29
● Get Your PCBs Made, Dangerous Prototypes -
http://dangerousprototypes.com/docs/Get_your_PCBs_made
● Hardware will cut you (video), Amanda Wozniak -
http://blip.tv/w0z/hardware-will-cut-you-4321930
● An example DFM checklist -
http://www.ansencorp.com/ANSEN_DFM_Checklist.pdf

33. Thanks for listening!
http://www.bunniestudios.com/blog/?p=2160