Do you allow your manufacturer to do some changes to your PCB design? If yes, do you think that the manufacture can make your de

We just subcontract assemble boards, but have our preferred PCB supplier. If an existing board manufacture is transferred to them they often recommend change/ improvements which we have to get authorised from our customers. Although the boards may work ( electrically ) I pftem confer with the designers too to ensure reliable manufacturing quality etc

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The problem is they said what we designed is not qualifyed for production and they have files called "DFM" which is used for the real production to fit with the production line

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*You* may be well versed, but not every designer is experienced or even familiar with DFM.

I don't care how sophisticated the circuitry is, if you can't build it it's a lousy design, and as an EMS we see many designs that shouldn't have passed the review stage (if there WAS a review).

Holes too small for the PTH leads, unplugged vias in pads, HASL specified for high density designs, and designs with NO drawings, no notes, etc..

That said, our favored fab shops rarely suggest changes to a design unless the board files included panelization and the method isn't appropriate for the layout, or if the design is incompatible with standard methods and processes.

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We can provide better suggestions to customers, but customers do not agree, we will make products according to the original design of the customer, otherwise it will cause disputes. There is also a case,we are not sure whether the customer design has specific needs and we are not allowed to change it, so the supplier opinions must be mentioned, also to make the perfect product, but the most general decision right is the customer .

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Thank you for your comments

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Thank you for your comments

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