Electronics Forum: missing fillet in via (Page 1 of 1)

Blow Holes voids in solder fillet on caps

Electronics Forum | Thu Jun 28 09:57:50 EDT 2012 | mosborne1

blow holes and via holes are almost always caused by moisture and in PTH they could be moisture and improper drilled holes. If you are seeing solder balls next to the parts than I would say you have a reflow profile problem. Are you using any kind of

Blow Holes voids in solder fillet on caps

Electronics Forum | Thu Jun 28 17:05:46 EDT 2012 | davef

Here’s what we seem to know: * There’s a problem with voiding in the solder connections of SMT capacitors * A void is an open area caused by air or process fluid that is trapped within a solder connection * Voids are an allowable condition as long as

Plated through via's in pads.

Electronics Forum | Wed Feb 05 13:08:20 EST 2003 | joeherz

You're correct that a thicker solder deposit will make bridging on fine pitch devices a bigger risk. Another alternative could be to slightly over-print the pads (onto the soldermask) ala pin-in-paste process. Basically adding enough solder to fill

Re: Through holes in SMT pads

Electronics Forum | Thu Jul 08 12:33:52 EDT 1999 | Mike Demos

Thank you all for your replies. Thanks to your replies and backup from the IPC-SM-782A (section 3.6.3.2) and James Blankenhorn's "SMT Design Rules & Standards," the designer has agreed to provide adequate clearance between the via and the pad. I wi

Problem with solder joints in wave solder

Electronics Forum | Tue Jan 21 13:51:19 EST 2014 | rgduval

Armando, Is the problem in the same spot on the board with every run? If so, there might be something about that particular location that is part of the cause (ie. ground or power plane connection). It sounds like you're seeing blow holes, or insu

Re: Through holes in SMT pads

Electronics Forum | Thu Jul 08 15:38:27 EDT 1999 | Earl Moon

Thank you all for your replies. Thanks to your replies and backup from the IPC-SM-782A (section 3.6.3.2) and James Blankenhorn's "SMT Design Rules & Standards," the designer has agreed to provide adequate clearance between the via and the pad.

Re: Through holes in SMT pads

Electronics Forum | Tue Jul 06 16:44:14 EDT 1999 | John Thorup

Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. Th

Paste Penetration in Via for Paste Through Hole

Electronics Forum | Tue May 12 04:15:48 EDT 1998 | Chris Sargent

Help! We have been doing some trials on Paste Through Hole and have encountered a problem. The screen is designed (as is suggested in technical info re PTH) to give double the paste volume required to fill the void between the pin and via. The pro

Re: Paste Penetration in Via for Paste Through Hole

Electronics Forum | Fri May 15 18:18:51 EDT 1998 | Earl Moon

Help! We have been doing some trials on Paste Through Hole and have encountered a problem. The screen is designed (as is suggested in technical info re PTH) to give double the paste volume required to fill the void between the pin and via. The

solder question on crystal in DFN style package

Electronics Forum | Mon Apr 05 16:12:16 EDT 2010 | dyoungquist

We are installing via reflow soldering a crystal that has 2 pads, 1 each end. They are flat pads on the bottom of the part with a small area of the pad looping around and up the side of the crystal on the end. Inspection of the cyrstal under a 40X

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