Electronics Forum: plating (Page 226 of 252)

Poor soldering on fine pitch?

Electronics Forum | Fri Jun 09 12:13:11 EDT 2006 | Chunks

Rob and Pete are both right. "We" had the same problem, with just one manufacturer of the same style QFP (don't want to name names here). We had the same style of QFP from a different manufacture right next to the problematic one on about 3 product

Lead Free boards

Electronics Forum | Mon Aug 28 17:04:52 EDT 2006 | Board House

ImSn - Immersion Tin - Not Recomended- short shelf life ImAg - Immersion Silver - Prefered Surface finsh by most Board houses, Best reworkablility, 12 moth self life, ENIG - Electroless Nickel Immersion Gold - Second Choice for Board Shops, 12 -

Wave Solder - solder bubbles/outgassing??

Electronics Forum | Tue Nov 21 19:23:15 EST 2006 | greg york

Had exactly the same problem the other week. Baked some boards did improve slightly but not convincingly. Washed bare PCb and found excessive HASL fluids left on board from improper rinsing and problem disapeared. Baking HASL fluid out is impossible

Hand Solder tips deterioration - No-Lead Pb

Electronics Forum | Wed Jan 03 20:30:11 EST 2007 | mrduckmann2000

We too are having issues with our soldering iron tips. We purchased the new Weller WD series irons which we were told would work just fine with lead-free solder. The Weller unit has changed 3 times in the last year(latest unit is the WD2M series).

Flat flexible cable to PCB (RoHS assembly)

Electronics Forum | Fri Dec 29 08:14:19 EST 2006 | joey_dragon

Thank you for the quick reply! Actually, the "type B" I referred to applies to a flex cable that can be found in this page: http://www.tennrich.com/trtw/cabling_3.php It is a reverse Engineering project and, from what I can see, there is, indeed,

Bake out CCA

Electronics Forum | Mon Jan 08 18:58:27 EST 2007 | Mike F

Normally someone would have replied to tell you to do a search of the archives. I've read at least 4 or 5 different threads dealing with baking out PWB's, but none were for this special material. First, have you contacted the manufacturer of the PW

Indium Solder Hermetic Seal Voiding

Electronics Forum | Wed Jan 10 17:18:11 EST 2007 | flipit

I am soldering a Germanium Window with a > metalized rim to a Ni-Au plated kovar lid. The > solder joint needs to be hermetic. I am using > 80In solder washer shape preform, but am > experiencing lots of voiding when x-rayed, > although the jo

BGA opens

Electronics Forum | Sun Jan 14 16:35:48 EST 2007 | Austin

I have several boards built at various CM's. We have prototype builds with some JTAG failures on BGA's (1-3 failures with qty 3, 1500 pin BGA's). CM's always claim reflow profiles look good. X-ray does not show bridges and they claim it looks good, b

Hitachy QFP 256 leads problems

Electronics Forum | Sun Mar 18 23:01:11 EDT 2007 | diesel_1t

Hi there, I want help on the following issue. Where I work, we place a component QFP 256 terminals (20 mil pitch)from hitachi (renesas), we use a MPM UP-3000 screen printer, IP-III placement machine and Vitronics 8 zones reflow Oven. lead plating

Pattern matching type fiducial at Topaz/ Emerald machines

Electronics Forum | Sat Mar 24 07:07:52 EDT 2007 | stefi

Hi, Thanks for the reply, The fiducial which posed problems is a 1 mm diameter gold plated circle fiducial. The problem with this is that the vision system sees it darker than the surrounding area. The surrounding area is all copper covered with th


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