Electronics Forum: fine pitch components (Page 9 of 222)

fillets on fine pitch parts/poor wetting

Electronics Forum | Thu Nov 07 12:35:38 EST 2002 | slthomas

Sounds like you're talking about the "heel" of the lead not being soldered, in other words, no heel fillet, which IS necessary. That problem, for us, was attributed primarily to poor layout (insufficient length of pad extension to provide room for

Non wetting on fine pitch product

Electronics Forum | Thu Sep 07 07:41:06 EDT 2006 | Bubba

Check for coplaner leads if this just exists at reflow process, i.e. look at part before oven, turn on 3D at placement machine. If you see after wave solder, the wave could cause coplanarity issues on top as well if you are going slow enough to refl

Non wetting on fine pitch product

Electronics Forum | Thu Sep 07 10:32:12 EDT 2006 | slthomas

Is the solder reflowing on the pad but not wicking up the lead, or does there appear to be insufficient solder to wet both, or is it not reflowing at all, or.....? Have you verified your profile? What is the condition of your paste (expiration date,

Non wetting on fine pitch product

Electronics Forum | Fri Sep 08 10:23:38 EDT 2006 | slthomas

By profile (profile has not been changed) are you referring to the oven zone settings or the actual charted profile of a trip through the oven as recorded by a thermal profiler? Some ovens will continue to function without warning as long as temps

Trouble selective soldering fine pitch connectors

Electronics Forum | Fri Dec 07 13:31:09 EST 2012 | kenkay

We had a similar issue and it was fixed by trimming the connector so there was barely enough lead protrusion through the board to show a discernible lead. We had to get a special plate and small machine to cut the connectors, but we haven’t had a bri

Trouble selective soldering fine pitch connectors

Electronics Forum | Wed Dec 19 10:33:58 EST 2012 | emeto

I had a connector like this and here is my recommendation: 1. Flux type(I like better alchohol based flux than water based) 2. Try higher soldering speed(when I say higher I mean several times higher) Goodf Luuck!

DEK fine pitch autoflex pin breakage

Electronics Forum | Fri Mar 19 19:05:27 EST 1999 | Earl Moon

Folks, I think we are getting closer to being very happy with DEK stencil printers of the 265 GSX variety. However, problems continue arising concering fine pitch autoflex tooling pin breakage. We are told by the British engineering establishment,

Trouble selective soldering fine pitch connectors

Electronics Forum | Wed Dec 12 16:12:58 EST 2012 | tombstonesmt

Glad to hear we have more Jade users on the forum! What kind of flux footprint is your fluxer leaving on the board? You called it a "spray" fluxer.. We use the MIC fluxer that functions like a jet fluxer. Do you flux each individual lead or do a

Re: fine pitch on thick copper

Electronics Forum | Tue Dec 21 16:47:15 EST 1999 | GERARDIN

Hello Pascal As mentioned by Wolfgang the key issue is the printing process capability. For a thick copper level 90�m we noticed that the pad reduction can be greater than 20% depending on supplier sources. Typicaly for a cad Width = 0.4 we can

fillets on fine pitch parts/poor wetting

Electronics Forum | Thu Nov 07 09:56:26 EST 2002 | bpan

Thanks for the ideas guys. My QC inspector can take a pick and move the back part of the lead....even though the front of the lead is soldered enough to hold. There is SOME NOT ALL areas where there is no solder on the curved portion of the lead.The


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