Electronics Forum: solder balling secondary reflow (Page 1 of 83)

Re: solder balling

Electronics Forum | Mon Aug 07 14:02:54 EDT 2000 | Brian W.

If you are satisfied with the apertures, then you need to check placement pressure, plant humidity, and the reflow profile. If the placement pressure is too great, it will separate minute portions of the solder from the pad. When the solder reflo

Re: solder balling

Electronics Forum | Thu Aug 10 13:16:17 EDT 2000 | Bob Willis

Here is some thing that I wrote a while back on solder beading. First what is a Solder Bead? The term solder bead is used to differentiate it from solder balls. A solder bead is a solder ball but its location is normally constant unlike solder bal

Re: Micro solder balling

Electronics Forum | Tue Oct 31 14:52:25 EST 2000 | Dr. Kantesh Doss

Hi Antonio: You clearly have printed excessive amount of solder paste on the pad. You can reduce the amount of paste by one or two methods: 1. Switchover to 5 mil thick stencils. 2. Change the design of your stencil openings (at the discrete compone

Re: solder balling

Electronics Forum | Thu Aug 10 03:30:42 EDT 2000 | JohnW

Ramon, Solder ball' are a bitch aint they?, identifying the right location to fix em is a bigger one. As you and the rest of teh guy's have said yes you'll need to look at your stenil..but maybe your stencil is good so you'll need to look else where

Micro solder balling

Electronics Forum | Thu Oct 26 08:59:56 EDT 2000 | Antonio A. Medina

Ok guys, I need help. Here's the deal. We're getting micro solder balls under discreets on the bottomside of the board. Here's my set up... MPM screener w/vacuum plate 6 mil metal screen with 90% circular (rounded) apertures 7 mil (measured) past

Re: Re balling BGA

Electronics Forum | Tue May 26 15:05:39 EDT 1998 | Justin Medernach

| | I know it's been covered before, but is there a newest, best way to reball BGA devices. Also, what's the latest rework methodology (pardon my linguistics). | | Earl Moon | Earl: We send the BGAs to a service "re-baller." Dave F | | PSI, 16833

Re: Re balling BGA

Electronics Forum | Tue May 26 18:24:05 EDT 1998 | Earl Moon

| | | I know it's been covered before, but is there a newest, best way to reball BGA devices. Also, what's the latest rework methodology (pardon my linguistics). | | | Earl Moon | | Earl: We send the BGAs to a service "re-baller." Dave F | | | | P

Re: Re balling BGA

Electronics Forum | Wed May 27 11:13:38 EDT 1998 | Justin Medernach

| | | | I know it's been covered before, but is there a newest, best way to reball BGA devices. Also, what's the latest rework methodology (pardon my linguistics). | | | | Earl Moon | | | Earl: We send the BGAs to a service "re-baller." Dave F | |

solder pop out from via hole at secondary reflow

Electronics Forum | Tue Jul 09 00:11:42 EDT 2002 | yngwie

Thanx Dave F.

solder pop out from via hole at secondary reflow

Electronics Forum | Mon Jul 08 11:53:40 EDT 2002 | yngwie

Hi Guys, We prints solder paste on via hole as the holes are used as the test points. This is a clean process. In normal production, upon completion of a primary side, board will proceed to secondary process immediately. The problem happened when

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