Electronics Forum | Thu Jun 25 05:19:39 EDT 2020 | SMTA-Davandran
Dear all, Anyone know what is minimum gap between SMT component.? Anyone have design guideline for it.
Electronics Forum | Fri Dec 08 02:07:40 EST 2006 | Loco
Are you able to glue them on using SMT glue before reflow?
Electronics Forum | Thu Dec 07 16:07:35 EST 2006 | ganoi
Thanks Russ for the feedback.
Electronics Forum | Fri Dec 08 16:58:47 EST 2006 | ganoi
Thanks Chris for the valuable experience! We'll try the stencil and see what the result will be.
Electronics Forum | Fri Dec 08 12:13:22 EST 2006 | ganoi
Sure would. We discussed applying the glue on the sides rather bottom of the part. Hopefully the seating of the part during P&P helps push it down. Certainly there will be still some gap as some of the glue will be under the part. Each experiment off
Electronics Forum | Thu Dec 07 18:13:13 EST 2006 | russ
Just had anopther thought, what type of parts are you using on this board? You may want to try a thin stencil like 5 mil or so this may help you. also can this "tilt" be from a movement during reflow? Russ
Electronics Forum | Fri Dec 08 11:30:19 EST 2006 | ganoi
We discussed about applying 2 dots of glue on either sides of the LED body, but have yet to try it out. Other discussions include conductive adhesive, using fixturing with weight, different stencil aperature design, hand soldering.
Electronics Forum | Fri Dec 08 11:56:23 EST 2006 | russ
Wouldn;t the glue hold the part up?, usually a glued part has much higher standoff than a soldered one. Russ
Electronics Forum | Thu Dec 07 14:28:25 EST 2006 | russ
Bad design if you have to have a perfect 1206 part. you will always have a lift of some sort when reflow soldering. Solder is 3 dimensional, therefore you cannot get any underneath component, thus eliminating the automated SMT process. Cannot glue
Electronics Forum | Fri Dec 08 16:54:42 EST 2006 | flipit
My experience with SMT LED packages is that certain LED package styles tend to float. This floating is caused because the LED is often only terminated on the bottom side of the LED package. Sometimes the LEDs are terminated like a SMT resistor with
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