Electronics Forum | Thu Dec 16 06:59:12 EST 1999 | Calvin Wong
Coplanarity also takes into consideration which is your reference plane. In the case of connectors, you can consider coplanarity between the highest and the lowest lead. Also, you can consider all the connector leads with reference to the connector
Electronics Forum | Mon Jun 05 10:32:39 EDT 2000 | Khalid Saeed
It could be a gold finish problem. The recommened gold finish thickness is less than five micro inches. Gold thickness greater than five microi inches is significant contributor for causing embrittlement of the solder joints. Verify the reflow profil
Electronics Forum | Tue Jan 14 11:39:51 EST 2020 | avillaro2020
Thanks Robl. I’ve contacted samtec followed their advice but ended up empty handed. Originally my stencil thickness is 6 mils, samtec stressed the need for the paste and charge to have good contact but this is challenged by the inherent charge non-co
Electronics Forum | Tue Apr 13 07:06:31 EDT 2004 | Chris Lampron
Hi Steve, Could it possibly be a coplanarity problem? I have assembled hundreds of SMT connectors at a Flex house and we found quite a few coplanarity issues. In many occurances, the connector showed symtoms that you are describing. Good Luck Chri
Electronics Forum | Thu Oct 08 22:32:58 EDT 1998 | Dave F
| | | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the re
Electronics Forum | Fri Jun 26 19:59:07 EDT 1998 | Scott McKee
| can any body help on assembling straddle mount connectors on to a board? for information on the connector - it is a berg micropak connector 1. You need a fixture to insure the pins don't bend while inserting them on the board, coplanarity is a re
Electronics Forum | Thu Jul 19 22:42:04 EDT 2001 | jax
I assume since you talk about adjusting the locking pin and changing tooling you believe the part is not being held down with enough force while being reflowed. Is this because the insufficent and open solder you mentioned is the lead sitting on top
Electronics Forum | Thu Oct 08 03:27:00 EDT 1998 | Thomas Blesinger
| | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the rema
Electronics Forum | Thu Jan 16 05:10:46 EST 2020 | soupy
Hej, we have some connectors placed on our PCB. 2*30legs 0.5 After reflow we detect lifted legs in the AOI. Always on the outer corners. Is this something ye have experienced? And any possible solutions? Stuff we have tried: Checking the cop
Electronics Forum | Wed Aug 09 15:06:17 EDT 2023 | SMTA-64386426
The first thing I do when looking at a part relative to stencil design, is determine the coplanarity per the data sheet. Ideally your stencil thickness should be equal to, or if needed, greater than the coplanarity. You want the solder paste to com
