Electronics Forum: inspection techniques (Page 7 of 8)

A.O.I recommendation

Electronics Forum | Fri May 27 08:30:04 EDT 2005 | FFagundes

I think I have everyone beat. I work for a small Contract Manufacturer, and we are trying to grow our business. We generally have two or 3 different jobs running at the same time and up to 10 different jobs running in a day. So we needed to find a

Re: Poor HASL Finish known to cause solder shorts?

Electronics Forum | Fri Sep 24 10:57:18 EDT 1999 | Earl Moon

| Hi Folks: | | We've been having bridging problems on our fine-pitch QFP's, despite thorough inspection of paste height, volume, and placement accuracies....profiles look good also. | | The bridging is happening after coming out of reflow...one la

Re: Black spots on gold finish pads.

Electronics Forum | Tue Dec 01 09:02:18 EST 1998 | Earl Moon

| | | Hi folks , | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our in

Re: Black spots on gold finish pads.

Electronics Forum | Fri Dec 04 20:26:34 EST 1998 | kallol Chakraborty

| | | | Hi folks , | | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Ou

Re: Black spots on gold finish pads.

Electronics Forum | Fri Dec 04 20:37:45 EST 1998 | kallol chakraborty

| | | | | Hi folks , | | | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most

FDA Approval

Electronics Forum | Mon Feb 24 20:37:01 EST 2003 | davef

Key Food and Drug Administration [FDA] Compliance Guidelines are in: * Blood/Biotechnology * Cosmetics * Drugs * Food * Medical Devices * Positron Emission Tomography The medical device industry adheres to the rules of Good Manufacturing Practice (G

Re: Wetting Balance Equipment

Electronics Forum | Mon Aug 17 02:57:47 EDT 1998 | Bob Willis

| | Looking for Suppliers of surface mount wetting balance equipment. | Bucky: Section 6 of the ANSI/J-STD-002 specification lists wetting balance suppliers. Dave F I like and continue to use the Multicore system. I have had many ours using the sys

Re: BGA Repair Problems

Electronics Forum | Mon Aug 17 02:50:44 EDT 1998 | Bob Willis

| Have an SRT w/preheat, 18 layer board all copper, 456 BGA needs to be removed and replaced. The manufacturer is Chip Express and during reflow it warps up or down. Causing either opens or shorts on the corners. I was using gel flux with multiple

Re: Board Warp And Twist

Electronics Forum | Thu Aug 10 13:12:10 EDT 2000 | Bob Willis

You may care to review the following from my Circuits Assembly page on line. "HOW FLAT IS FLAT AND DO WE NEED FLAT CIRCUIT BOARD, YES WE DO ? As production problems go there is one that keeps reoccurring time and time again. The blame is usually di

Re: Why are squares better than round ones?(and a update on my lil' nightmare)

Electronics Forum | Wed Apr 28 11:16:45 EDT 1999 | Steve Gregory

Hello all, I read about Steve's headache a few articles back and I'm really interested by his tip. However, I'm still wondering why square apertures release solder paste better than round ones. For the same volume of paste, the surface area of th


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