Electronics Forum | Mon Jul 02 20:13:41 EDT 2001 | davef
We agree with Wolfgang. Adding points along his line of reasoning: * Also consider placed component prescience. Sometimes, a mis-pick results in paste on the nozzle, which leads to the next component being stuck on the nozzle and not placed, which
Electronics Forum | Fri Aug 03 05:13:01 EDT 2001 | mugen
Well none of us, really know whether, this 0805 CAP is really an unsolder/tombstone defect, coz none of us verfied this with, our own eyes *duh* Funny, this only happened for us, on 0402 ~ 0201 SMD.... Check your land-pad design specifications, if
Electronics Forum | Mon Jan 31 13:34:43 EST 2000 | PAUL WOOD
HELLO CUSTOMERS OF OK LATEST INFORMATION UPDATE WITH REFERENCE TO OLD BGA 2000 MACHINES WHICH ARE NOW 6YEARS OLD MANY NEW INVENTIONS WHICH HAVE TAKEN PLACE CAN BE PURCHASED FROM METCAL TO BRING YOU TO THE FOREFRONT OF TECHNOLOGY.(PATENTED TO ) BGA 30
Electronics Forum | Wed Jan 12 20:20:54 EST 2000 | Bene
I had the opportunity to spend time with a demo and one on one with the inventor of the Ersa scope inhouse a few months ago. I see the scope complimenting X-ray inspection but not as a substitue. It allows you to view attributes of a solder joint t
Electronics Forum | Tue Dec 28 10:57:53 EST 1999 | Amy Castor
I have tried the water soluble flux and the aqueous cleaners but I got the same results you did; horrible corrosion and a white flaky mess. I know exactly what you're talking about. We do a lot of hand soldering around here, and the magical solutio
Electronics Forum | Mon Dec 20 19:09:54 EST 1999 | Chris
If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev
Electronics Forum | Fri Dec 17 16:25:05 EST 1999 | Brian W.
I used an off-line paste height measurement device to control my paste process. I did not inspect every board, just a random sample once an hour. I have used both manual and automatic devices. I like the automatic becuase: 1 - I have no "operat
Electronics Forum | Fri Nov 12 10:00:42 EST 1999 | Dave F
Edmund, following-on from Wolfy: Back in the old days, anyone who could spell "sodder" considered "bright and shiny connections" GOOD and "dull and grainy connections" BAD. Now, "dull and grainy" connections can be either GOOD or BAD, depending on
Electronics Forum | Tue Nov 09 20:06:26 EST 1999 | Robert Culpepper
This may help you regarding the V-Groove or scored board designs. With respect to material left, I did some experiments and found that for our process .009 of material seemed to be ideal. There was minimal stress required to break the boards apart ye
Electronics Forum | Tue Oct 12 16:08:44 EDT 1999 | Brian
| I need your help! We have been doing double sided surface mount for 4 years now. Up until 6 months ago I have not had a tombstoning problem. Since then I have a fairly high incidence rate of tombstones on the 0603 size resistors (no other parts).
