Electronics Forum: toe fillet (Page 1 of 11)

QFN Side fillet

Electronics Forum | Mon Jul 22 02:13:31 EDT 2019 | jandon

some PQFN package configurations have no toe exposed or do not have a continous solderable surface on the exposed toe and a toe fillet will not form. (IPC-A-610F 8.3.13)

Toe Fillets

Electronics Forum | Thu Jan 08 13:47:13 EST 2004 | guest

It is my understanding that per IPC specs toe fillets are not required as they do not add any strength to a solder connection. Our thoughts were allways that proper toe fillets are a sign of a good process. What are some of your guidelines and though

Toe Fillets

Electronics Forum | Thu Jan 08 14:33:50 EST 2004 | dwzeek

Toe fillets are not required per IPC. Toe fillets could be used as a process indicator, if you desire; I would not. Gull wing leads are typically cut off on the ends when manufactured; this exposes the non-plated material in the lead, typically coppe

How to improve the solder quality of QFN?

Electronics Forum | Fri Jul 08 16:35:04 EDT 2005 | Jason Fullerton

"Whether or not you need a toe fillet depends on your application. We have high reliability products where we can't use a QFN over a certain size, regardless of toe fillet. We have other applications where we meet the thermal cycle requirements for a

Toe Fillets

Electronics Forum | Mon Jan 12 08:56:09 EST 2004 | Paul F

Is anyone having issues with fillet inspection on AOI machines due to poor toe fillets caused by exposed base metal? We're just getting into AOI now and QFP inspection is proving difficult.

Poor Solderability on TSOPs with Alloy 42 Leadframes

Electronics Forum | Tue Jun 28 12:12:17 EDT 2005 | Paul

I'm with DaveF on this one. I think you'll be trying solve this one for a long time. Alloy42 just doesn't like to be soldered. What exactly is the issue? Lack of a toe fillets at on the cropped lead? There is no spec for a toe fillet other than to

How to improve the solder quality of QFN?

Electronics Forum | Wed Jul 06 14:36:05 EDT 2005 | Bob R.

The only way we can consistently get a toe fillet is to use a paste with an extremely active flux. We allow that paste on certain products, but discourage it's use because it's on the hairy edge of not meeting our lower limit in surface insulation r

Toe Fillets

Electronics Forum | Thu Jan 08 16:24:15 EST 2004 | Dean

I agree 100% The strength of the joint is contained at the interface. Ever seen a fillet on a mail stamp?

Fine Pitch QFP100 Solder Joint - Need Help!

Electronics Forum | Wed Oct 30 23:19:28 EST 2002 | caldon

Is toe fillet still required?

Toe Fillets

Electronics Forum | Fri Jan 09 07:51:31 EST 2004 | cal

DWZEEK-Nicely put. I agree. cal

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