01005 (0402 in metric unit) printing accuracy

Hi,

Yes, I would love to know this as well. Our machines can handle the component sizes, but how do the printers handle it? We have a DEK, and that's a good printer, but how do you design the stencil to reliably paste release on components this small.

I am guessing elctroform at least?

Regards,

Grant

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There is a spec I read that states +/- 0.001" (0.025mm) print deposition accuracy and repeatability is more than adequate for 0201-chip printing. I don't think any print studies where done for 01005 chips yet. There are several other factors besides the machine that effect print quality such as, PWB design and fabrication, condition of solderpaste, proper formulation of solderpaste, properly designed and maintained stencil. Industry leaders in printers MPM and DEK may be on-the-job already doing print studies for 01005 chips and can supply you with papers on 0201-chip printing. Be careful of printing machine manufacturer's "specmanship" claims. Alignment accuracy and repeatability is different than actual print deposition. Print deposition (solderpaste on the board!) accuracy and repeatability is where the rubber meets the road. There are independent measurement instruments than will provide this data over 20, 100, or more boards.

01005 chips are used in medical implant and small hand-held devices.

Mydata Automation was picking and placing 01005 components onto sticky tape at this year's APEX 05 show in California back in Feb.

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