| ??? 04/25/07 13:11 Modified: 04/25/07 13:13 Read: times |
#137922 - Not in my experience Responding to: ???'s previous message |
Hi Steve,
I've never heard of anyone using a jig during reflow. Now some specialized rework stations can mechanically hold the part down (with the same nozzle that placed the chip to begin with) during reflow, but if you need to you're using too much air flow. Heating from the bottom of the board is a good way to avoid displacing the part with air flow. I use a convection oven (which means I don't have a jet stream blowing right on the parts). However you heat the paste, when it melts all of those "surface tension" effects are going to move the chip a little bit, even if not visibly. You want to let that happen. Otherwise, you will store up tension/stress in the solidified solder joints. It's much better to just let the part flow. Joe |
| Topic | Author | Date |
| SMT soldering - onesies twosies | 01/01/70 00:00 | |
| It depends how many pins you are talking about | 01/01/70 00:00 | |
| Ive worked with large BGA packages | 01/01/70 00:00 | |
| BGA soldering | 01/01/70 00:00 | |
| hmmm, interesting | 01/01/70 00:00 | |
| I\'ve done the CP2102 | 01/01/70 00:00 | |
| solder bridges | 01/01/70 00:00 | |
| It\'ll flow | 01/01/70 00:00 | |
| JIg ? | 01/01/70 00:00 | |
| Not in my experience | 01/01/70 00:00 | |
| re: Jig? | 01/01/70 00:00 | |
let your wife do it | 01/01/70 00:00 | |
| Here's a link | 01/01/70 00:00 |