Electronics Forum: resist smudges rework (Page 1 of 6)

Conformal coating rework jumpers

Electronics Forum | Tue Oct 04 20:31:16 EDT 2016 | davef

IPC-7721, Section 6.1, Jumper Wires, Jumper Wire Selection #5 states: "Recommended wire is solid, insulated, plated copper wire, 22 to 32 AWG with a heat resistant insulation. Wire with tin-lead plating may be restricted due to environmental laws."

BGA rework and inspection

Electronics Forum | Thu May 30 10:31:03 EDT 2002 | robbied

Hi Yannick. This is an issue that we are just recently getting into but here is some ifo that I have gathered so far. I have seen/ used 2 different rework machines. The one we have bought is a 'PACE TF2000' which was at the lower cost end of the mar

BGA rework with unplugged vias PCB

Electronics Forum | Thu Dec 07 00:55:51 EST 2006 | billylim

As you are aware the common method to rework BGA is : 1. Remove BGA with hot air reflow machine ( SRT as current practice) 2. Clean the BGA pad using solder iron and solder wick. 3. Replace BGA with SRT rework machine. The problem we have with

Re: Cost of solder joint rework

Electronics Forum | Tue Jun 06 14:05:22 EDT 2000 | Jeff Sanchez

Ray, I don't know for sure what exact data Ceeris used to come up with their figures. Did they account for shipping? Was the rework done by expensive equipment? When I read your thre

Re: What is the typical BGA substrate pad alloy

Electronics Forum | Wed Dec 08 17:58:44 EST 1999 | Dave F

Dave: You should see a solder smudge on the gold plating where the ball was attached, if there is (was) solder reflow during either the (1) BGA fabrication, (2) your BGA attach, and / or (3) your BGA removal. You rework will not remove the solder

Making a BGA stand up

Electronics Forum | Mon Jan 13 16:24:15 EST 2003 | russ

Youch! I know this is going to sound stupid but.... I have done it in the past in limited quantities. We placed capton (polyimide) tape at each of the four corners for a similar situation. It did work but the operator has to be careful in placing

0402 wave soldering

Electronics Forum | Thu Jan 15 03:20:59 EST 2009 | sachu_70

Hi Andrzej, I guess you mean peelable solder resist. Good idea to try during R&D, but certainly not a solution on production floor. Also, few constraints to be considered such as presence of entrapped air between component and solder resist, the natu

Making a BGA stand up

Electronics Forum | Thu Jan 16 03:43:42 EST 2003 | johnw

1st off for the forum folk, I don't like the fact that the new system only let's you see the posting your replying too, I'd rather be able to see the thread..... Anyhoo, why this alloy?, it's because it's the device manufacturers preferred and the c

Solder Mask for Wave Rework

Electronics Forum | Wed Apr 22 12:22:46 EDT 2020 | mvargas

Hi, We are currently using WonderMask PX Peelable Solder Mask # 2222 for the wave rework process, but we are having a lot of trash in the pot. I understand that it is because the solder mask resists the pot temperature (500F) but not the rework tim

Reworking Glued Components

Electronics Forum | Mon Aug 09 20:12:24 EDT 1999 | JohnW

Folk's, I'm looking for some helpful suggestions for reworking wave soldered bottomside components that have been glued. I'm not a fan of the twist and break approach and as some of them either have a double dot or a slot configuration this tend's t

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