Electronics Forum | Tue Feb 22 01:38:42 EST 2005 | JSS
We r using QFPs of 0.5mm pitch and r not getting any soldering prob at the end.But some new customer insists upon the thickness check of the solder paste after printing. At present we don't hv thickness checking system.We r controlling the amount of
Electronics Forum | Fri Mar 18 14:21:02 EST 2005 | Dreamsniper
We are producing control products for the Aerospace Industry both Commercial and Military. I have TQFP 100 fine Pitch in one of my PWB's Solder Side and have no misalignment problems or defects on my part after 2nd reflow. I control my reflow profile
Electronics Forum | Sun Jun 26 21:52:15 EDT 2005 | thaqalain
After inserting 128 MB,168 Pin,PC100-222-620 (AZEN RAM)(taken out from another computer) alongside present Kingston KVR133x64C3/128,this data is copied from Systeminfo.txt file and for your kind review/suggestions. Total Physical Memory: 126 MB
Electronics Forum | Thu Jul 28 09:47:06 EDT 2005 | fctassembly
Hello Carl, The main reason there is little information on lead free soldering to ENIG is because most of the lead free soldering to date has been Japanese consumer products. To keep costs down, the major surface coating used has been OSP copper. It
Electronics Forum | Thu Jul 07 18:10:20 EDT 2005 | russ
You should use Xray to qualify your process. Frequency of Xray inspection after that will need to be determined by your process capability. If you use paste inspection process, once you verify that your profile and placement are good you in theory
Electronics Forum | Thu Jul 21 02:45:51 EDT 2005 | Base
Probably very far-fetched, but I can think of a scenario like this: - machine picks up a component - between vision and placement the part is lost, but the loss is not detected due to oversize tool, which causes the amount of vacuum drop to go unnot
Electronics Forum | Fri Dec 16 10:25:14 EST 2005 | GS
Hi Liza - polystirene monolayer (blend ?) could be sealed at less presure, ie 35-40 PSI. Temprature could be 165�-170�C. For sure after sealed you shoud make sure the sealing strength (peel strength)should meet min 15-25 N.(bet avg from 25 to 45 N)
Electronics Forum | Thu May 18 19:45:32 EDT 2006 | grantp
Hi, The tin flush is a good idea, and better than the suppliers suggestion of filling with lead-free solder which is much more expensive. I guess we won't be leaving a KG of solder in the bath, but based on your experience, how much remaining sold
Electronics Forum | Mon May 22 18:19:29 EDT 2006 | Steve
I have read some threads about poor wetting on palladium-silver (Pd-Ag) coated components. I followed the suggestions, but I am still having a problem. The part is an 0603 chip type (Vishay varistor). The Process: solder paste is lead-free Alpha Met
Electronics Forum | Thu Jul 13 00:45:15 EDT 2006 | donb
Haha, I have so many of these stories... where to start? My favourite was a few years back, we had a new mechanical engineer fresh out of university. As a part of his new role, he was purchasing tools & equipment for the maintenance workshop. After
