Full Site - : ic coplanarity (Page 10 of 11)

Lifted Lead

Electronics Forum | Fri Sep 10 17:32:59 EDT 2004 | Yngwie

We have recently faced lifted lead problem that happened on our 20 mil pitch QFP. We have infact pushed it back to the incoming quality, but still I have a few questions to bring up : 1) what is the typical coplanarity tolerance that ICs' manufactur

Lead Coplanarity issue....help

Electronics Forum | Fri Jul 22 07:37:32 EDT 2005 | David Robbie

Hi, I am an engineer based in Scotland, but have some IC's sitting with a company in the Boston area, that need checked for coplanarity. Does anybody know of a company/ lab with a lead inspection machine that they could be sent to? Regards, Dave.

Lifted Lead

Electronics Forum | Tue Sep 14 06:08:46 EDT 2004 | sc

The general control on QFP fine-pitch coplanarity is +3mils. suggest to look at the re-use of thrown out component from SMT machine. If the component pack in std pack, then most probably the lifted is due to processing, not incoming as the packaging

Flux appearance

Electronics Forum | Wed Mar 15 11:27:05 EST 2006 | stepheniii

By any chance is it eutectic paste and pallidium leads? Also how tight are you checking coplanarity? At least with the MPA-G3 you can check so tight that any IC will fail in the real world. Or you can check so loose that you might as well not check.

Lead Lift in QFP

Electronics Forum | Thu May 04 04:29:05 EDT 2023 | abhishek10

we have observed a Field claim in ECU where root cause is Lead lift found in one of the IC. What could be the possible reason for lead lift and how to avoid the same in future. QFP is the Type 1.Checked the Part Library(3-D Check Refernece no.-23

Lead Lift in QFP

Electronics Forum | Sat Jul 22 13:20:35 EDT 2023 | shrikant_borkar

Dear Abhishek, I too got the opportunity to investigate this defect Lift lead for SOT. Lead lift in IC, and SOT can occur due to various reasons. Here are some possible reasons for lead lift and ways to avoid them: During the assembly process, mecha

Re: IC leg of RF unit lifted..

Electronics Forum | Thu Jun 29 11:08:55 EDT 2000 | Dave F

Kok Han: Good to hear from you. Please help us understand you situation better by talking more about: � Component IC of the RF unit (IC101). For instance: SMT / PTH, package, pitch, lead material, lead finish, package type, package weight, coplan

QFP IC open solder

Electronics Forum | Tue Sep 24 12:58:27 EDT 2002 | dragonslayr

Although focusing on solderability may be the right answer, I wonder if you are satisfied that co-planarity is not the root cause. With random events of contact opens, this may be the case. Cleanliness of the stencil can also be a source of your pr

Re: Non soldered leads on ic's

Electronics Forum | Fri Feb 19 09:14:52 EST 1999 | Justin Medernach

| During inspection and test we find leads which do not get soldered. Some are because of insufficient paste, but with others everything looks right. This will only happen on 1 to 2 pins, and it is not isolated to a specific type of ic or location o

Re: V-Tek Tape and Reel Machines...

Electronics Forum | Fri Apr 23 17:44:50 EDT 1999 | Stefan Witte

| Hey Ya'll! | | Have any of you ever worked with one of V-Tek's "Economax" tape and reel machines? The biggest thing I'm curious about is the type of cover tape that these machines use. It's something they call P.S.A. (Pressure Sensitive Adhesive)c


ic coplanarity searches for Companies, Equipment, Machines, Suppliers & Information

SMT feeders

Stencil Printing 101 Training Course
pressure curing ovens

Software programs for SMT placement and AOI Inspection machines from CAD or Gerber.
convection smt reflow ovens

World's Best Reflow Oven Customizable for Unique Applications
High Throughput Reflow Oven

High Precision Fluid Dispensers
Professional technical team,good service, ready to ship- Various brands pick and place machine!

Internet marketing services for manufacturing companies