Electronics Forum: gull wing lead forming (Page 1 of 7)

Re: resistor networks- leadless vs. gull wing

Electronics Forum | Mon Sep 27 04:08:25 EDT 1999 | Earl Moon

| | | I am in the process of picking a new resistor network for one of our new board. Since we are new to SMT i would like to get some opinions on networks. Currently we use one molded gullwing type network on our boards with no problems. Other than

lead straightening

Electronics Forum | Fri Feb 12 09:54:20 EST 1999 | Kris

Hello all, Looking for an automated device for straightening the leads of TSOPs and other gull wing devices prior to tape and reel or tray placement. Appreciate any help! Kris

Flat ribbon lead ?

Electronics Forum | Wed Nov 29 23:17:37 EST 2006 | raychamp007

Dear Friend, SMD E-cap wasn't a Flat ribbon, L or gull wing. Pls. look at SOIC & QFP for Flat ribbon, L or gull wing. So far IPC had confirmed dont have any criteria set specific for SMD E-cap.

Flat ribbon lead ?

Electronics Forum | Thu Aug 11 14:10:31 EDT 2005 | kmorris

Okay....we're all familiar with "J" leads and "Gull wing" leads on SMT components.....can anyone elighten me on what a "flat ribbon" lead is?? Can you supply a picture? Thanks in advance.

Re: lead straightening

Electronics Forum | Mon Feb 15 12:34:15 EST 1999 | Dave F

| Hello all, | Looking for an automated device for straightening the leads of TSOPs and other gull wing devices prior to tape and reel or tray placement. | Appreciate any help! | Kris | Kris: Check: 1 SMTnet archives 2 SESA 1700 Wyatt Dr Suite 11 S

Re: lead straightening

Electronics Forum | Mon Feb 15 13:28:49 EST 1999 | Kris

| | Hello all, | | Looking for an automated device for straightening the leads of TSOPs and other gull wing devices prior to tape and reel or tray placement. | | Appreciate any help! | | Kris | | | Kris: Check: | | 1 SMTnet archives | 2 SESA 1700 W

Heel bend wetting for Gull Wing lead

Electronics Forum | Fri Apr 13 02:55:47 EDT 2007 | raychamp007

Davef, Thanks for your reply. Also sorry because I didint notice your ealier reply on http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=48991 regarding the normal gull wing lead, the solder fillet must extend to the mid point of outside lead

Heel bend wetting for Gull Wing lead

Electronics Forum | Thu Apr 12 20:44:58 EDT 2007 | raychamp007

If the solder joint meeting 8.2.5.4, minimum side joint length(D) and also meeting 8.2.5.6, minimum heel fillet height (F) but the heel fillet NOT extend to the mid point of outside bend. It is acceptable?

Heel bend wetting for Gull Wing lead

Electronics Forum | Thu Apr 12 21:54:05 EDT 2007 | davef

We'd say yes, if it meets both 8.2.5.4 and 8.2.5.6

Heel bend wetting for Gull Wing lead

Electronics Forum | Fri Apr 13 07:25:06 EDT 2007 | davef

Your paste should meet the mid-point of outside lead bend. If you cannot meet that, IPC-A-610D, 8.2.5.6 defines the minimum. We agree that it gets confusing when you post multiple threads on the same or very similar topic.

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