September 11, 2009 AT 2:00 am

QFN solder paste stencil guidelines

Qfn Stencil Full Open Aperture Modded
QFN solder paste stencil guidelines – HANDY!

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5 Comments

  1. Nice! It’s always interesting to see the art of engineering, using design to balance multiple requirements. What’s especially cool is the design narrative, what was tried and the discoveries that led to the next design iteration, and when the design was considered good enough to be ‘done.’ With solder, you’re balancing mechanical, electrical, thermal and reliability requirements, plus trying to simplify and economize construction.

    Maybe I’m reading too much into a tutorial on how to stencil goo onto a board – I don’t think most people see the creative problem solving aspect of engineering and the satisfaction that comes with finally creating an elegant design. Or for that matter, a clever hack.

  2. I know that adafruit has had an epilog for quite awhile now. I wonder if they could figure out a way to help those of use interested in stencils to get our hands on some. Note: I don’t live in New York city so I cannot make an appointment. My guess is that the customer support time involved would be the problem. But… If a customer submits a dxf/dwg drawing they should be well acquainted with dimensions and any discrepancy would be their fault, end of story.

  3. http://www.ladyada.net/library/laser/pcbstencils.html

  4. I have to agree with you, Bob. For me, that delicate balance, the art that goes into the process and compliments the engineering is every bit as important as the engineering. And, so frequently it

  5. Hello,
    have you ever have solder paste bridges in QFN because the ground pad of the QFN have via holes covered with solder mask and this solder mask is very hight (2 Mils), how can I solve this problem, thanks

    regards

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