Electronics Forum | Thu Feb 17 21:42:12 EST 2000 | Dave F
Hey Bud: Moved from that Bi-crap to something serious, eh? Several things: 1 Get in touch with Doug Romm (drom@msg.ti.com) at Texas Instruments. He talks palladium. 2 Review the archives on Palladium. 3 I think you're running light on temps. Eut
Electronics Forum | Thu Feb 17 21:42:12 EST 2000 | Dave F
Hey Bud: Moved from that Bi-crap to something serious, eh? Several things: 1 Get in touch with Doug Romm (drom@msg.ti.com) at Texas Instruments. He talks palladium. 2 Review the archives on Palladium. 3 I think you're running light on temps. Eut
Electronics Forum | Wed Nov 06 16:31:59 EST 2002 | slthomas
I would also consider paste control (don't take it personally...I always have to get after people about this one), time on the stencil, time between print and reflow, solderability of the component leads, paste volume (that one really got us once....
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
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
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
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.
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
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
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?
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