Electronics Forum | Sun Dec 02 20:02:23 EST 2007 | chs
Hi, There are QFN 32,40,48 pins with middle pad. Body size are 7x7 and pitch 0.5mm. I means as compared to 2 sided package, QFN are easily damaged by external mechanical / thermal force. Phenomenon observed are mold cap open which further caused wire
Electronics Forum | Wed Jul 12 13:06:41 EDT 2000 | Brian W.
I have done both. If you have a line that runs both sides in none pass, running the adhesive side first allows you to have one less machine or station for board flipping. If you have to move the board from one line to another, or back to the front
Electronics Forum | Wed Oct 06 20:42:50 EDT 1999 | Mike Cooper
Yes. We use high speed dispensing (PanasonicFA)as an integral part of our PCB assembly. Our business is automotive electronics and our typical product is 2-sided smd with some through hole. We assemble topside first, through hole, then bottomside. Th
Electronics Forum | Wed Sep 15 06:14:16 EDT 1999 | Wayne S.
| I'm looking for some good articles on reflowing of double sided SMT boards. I'd like to come up with a process for low volume prototyping, but need to understand the do's and don'ts. | Hello, you can get some insight by typing in double sided boa
Electronics Forum | Tue Aug 17 00:42:40 EDT 1999 | ScottM
| Does any one have any idea which is usualy more expensive, to get components on Reels or in Trays ( I mean large components ofcourse). | What is price diffrence percentage ? | | practicaly, is one method is prefered to the other? | | Thanks alot
Electronics Forum | Tue Oct 03 14:14:06 EDT 2006 | slthomas
What is the likelihood that we'll be able to manually dispense paste on 25 mil pitch, 20 mil pads and get away without bridges? We have a CTS Series 753 resnet we need to place and the build qty (30) and board layout (.5" x 1.2" unpanelized, 2-sided)
Electronics Forum | Sun Mar 20 15:05:28 EDT 2011 | floydf
We are preparing to run a 2-sided board with BGAs on one side and passives on the other side. We have two schools of thought on which side we should run first. One school says run the passive side first, then run the BGA side and the surface tensio
Electronics Forum | Wed Jan 29 10:23:24 EST 2014 | alphatronique
Hi i have strange issue on one of my TM8FC feeder feeder seem to have 0.5 to 1mm longer that my other feeder on image above have 2 side by side picture was take on same machine slot ,and both feeder have same part separation clip i even swap cl
Electronics Forum | Fri Mar 02 03:14:01 EST 2018 | reckless
The budget is tiny, I agree. It is more to get our feet wet. We are mostly afraid of adding more steps in the process thereby making it more difficult to implement. I want to avoid a wave soldering machine and also want to avoid making two passes
Electronics Forum | Wed Aug 29 09:32:27 EDT 2018 | m_imtiaz
Dear All We are using structural similar type of connector in A & B product with same set parameter in selective soldering machine but result in B product is not good. Observation – Plating on A product Connector terminal done on all 4 side But In
