Full Site - : gc3w sac305 profile (Page 10 of 14)

Land size

Electronics Forum | Mon Jul 07 11:46:29 EDT 2008 | aj

Hi All, Can anyone advise the spec for land size of a lead 0.2mm in width? I am placing a TQFP128 0.4mm pitch, the leads seem to be wider than the actual pads they are been placed on? I am also experiencing poor wetting on this part , it has NiPdAU

Conversion from SAC305 to SN100C

Electronics Forum | Wed Feb 04 08:28:07 EST 2009 | milroy

Hi, I have done conversion from SAC387 to SCS7 with great results on process improvement with low cost. I see only the melting point is higher but still the solder pot temperature settings is 250�C to 260�C as SAC. If somebody think the temperature

Voids with LGAs

Electronics Forum | Fri Jan 18 12:34:14 EST 2013 | duchoang

Yes, I have. think I have pretty good reflow profile. We use Lead-Free,No-Clean,SAC305 Solder Paste. The problem is at LGA design.The pad size is alot bigger than BGA. They are totally flat and do not have balls/spheres which melted and collapsed thr

Incomplete reflow

Electronics Forum | Sat Apr 05 13:04:33 EDT 2014 | horchak

237C max is on the low end for SAC305, especially if you have heavy leaded components. I always went with 245C and above depending on the board design. I noticed the electrolytic caps. You need to check max temp with the manufacture on those. When I

Aluminum Capacitor disassociated from sodler joint

Electronics Forum | Fri Feb 15 15:37:35 EST 2019 | emeto

Hello, I have a capacitor that doesn't form intermetallic joint with SAC 305 solder paste.The board is ENIG. Solder melts and forms good intermetallic joint with the PCB finish. However, capacitor can be removed with physical force - it looks like a

AIM SN100C Solder paste

Electronics Forum | Fri Apr 07 17:44:07 EDT 2006 | ratsalad

I still have half of a 500 g jar of this paste left. I'm going to give it another shot, but my first experience was not so wonderful. Everything was great until we reflowed it. Our profile matched AIM's recommendation, as far as I can see. The ch

BGA Voiding for RoHS

Electronics Forum | Fri Nov 13 08:27:43 EST 2009 | herman

Your customer is very unreasonable to demand void-free BGA SJs. Minor voiding is not a condition for rejection per IPC-A-610D, J-STD-001D, or even J-STD-001DS (Space addendum). Having said that, let me tell you that the voiding has little or nothing

Tombstones? Pb vs Pb Free

Electronics Forum | Wed May 10 00:27:46 EDT 2006 | Chris

Russ, By a longer profile you mean a more even slope across the entire profile. Unfortunately I only have a 5 zone oven that is fairly short. How many heated zones are you using? Did you shrink the 0402 pad design and leave less pad exposed out a

Lead free Solder Paste troubles !!!!

Electronics Forum | Thu Sep 23 11:56:30 EDT 2004 | rkevin

We are printing on an assembly using SAC305 Alloy Sn96.5 Ag 3 Cu .5 with a no clean flux and getting virtually NO spread with either a ramp to spike or straight ramp profile. We are printing to standard FR4 board with immersion Ag finish. I am trying

What is the rootcause for BGA Lifted PAD after reflow

Electronics Forum | Tue May 20 09:34:28 EDT 2008 | roc2x

Well something is different isn't it? * Paste * > Part supplier * Board fabrication * Was the > profile that you reference the measured > temperature or the the settings keyed into the > oven? > > The cross sections seem to show less > than exp


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