Electronics Forum | Tue Sep 24 12:49:43 EDT 2002 | dragonslayr
Aperture reduction @ 5 mils thickness is your best bet. It may take several attempts to get just the right paste volume. What aperture reduction was specified to the stencil house for these specific LEDS? or was the stencil blindly produced using a
Electronics Forum | Tue Sep 24 11:10:07 EDT 2002 | Gregg Temkin
I�d appreciate assistance in trying to resolve a placement/soldering problem. My company has designed a board which uses a large number of 0402 LED�s that are .028� high. The LED�s need to be soldered so that they point straight up and are not til
Electronics Forum | Tue Sep 24 22:29:04 EDT 2002 | davef
First, I don't have a clear fix on the problem. Please drill-down to more detail. We appreciate that you probably don't know the parlance. Just describe what you have and then what you'd like to have. Second, most 0402 LED are fabricated just lik
Electronics Forum | Wed Sep 25 05:08:33 EDT 2002 | msimkin
Gregg, We had a similar problem with our 0603 leds. They were being placed bang on, however, during the reflow, they twisted, fell sideways etc. We played with our profile, played with the paste volume & land pattern design, and only had a small impr
Electronics Forum | Tue Sep 24 12:30:11 EDT 2002 | Claude_Couture
I'm just shooting ideas here, but maybe a via hole in the middle of the solder pad would drain the excess solder by capillary force? Or using a tin plated PCB and printing flux only, then place and reflow. depending on the thickness of the tin plati
Electronics Forum | Thu Aug 25 10:32:03 EDT 2005 | davef
IPC-2221A, Generic Standard on Printed Board Design, the base document that covers all generic requirements for printed board design, regardless of materials. From there, the designer can choose the appropriate sectional standard for a specific techn
Electronics Forum | Mon Jul 26 06:19:51 EDT 2010 | grld_fischer
Hello All, I am brand new to PCB design and I came across this forum while browsing. It’s very interesting to meet members here sharing information on PCB designing. I came across few articles on web regarding DFM(Design for Manufacturability) metho
Electronics Forum | Wed Jan 13 04:16:55 EST 2016 | crystalpcb
Hi Brother, My Boy Friend is a engineer designer,he often use pads and Altium_Designer.
Electronics Forum | Mon Dec 02 10:45:04 EST 2019 | slthomas
*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
Electronics Forum | Wed Jul 15 17:56:20 EDT 2015 | mikekeens
Wouldn't say there is a perfect tool for PCB design as it depends how much you have available to spend. Here's a list of different PCB design software, some of which are free and some come at a cost:- http://www.surfacemountprocess.com/pcb-design-s
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