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Lead-free solder alloy: SN100C from AIM solder

Hi all, Does anybody have any comments on the lead-free a... - Jun 29, 2005 by

Hiram

#35232

Lead-free solder alloy: SN100C from AIM solder | 29 June, 2005

Hi all,

Does anybody have any comments on the lead-free alloy SN100C from AIM solder? I am in the process of selecting the "right alloy" for our lead-free wave solder machine. We manufacture A/V equipment.

I appreciate your feedback as usual.

Hiram

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GS

#35235

Lead-free solder alloy: SN100C from AIM solder | 29 June, 2005

Hello,

in Europe (SN100C sold by Balver Zinn) several solder pots have been filled by this alloy. On the paper I heard talking very well in terms of performance and good price, but not data are available ( as I know) about performance and if really does not corrode the SST or non Titanium made Pot and Pumping system.

I heard also people talking about HASL made by SN100, it seams it has a better behviour in terms of copper dissolution then HASL made by SAC alloys (!!?).

Regards GS

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#35238

Lead-free solder alloy: SN100C from AIM solder | 29 June, 2005

SN100C (the manufacturer company is Nihon Superior) it is sold by two companies in USA AIM and Krayden, we are still in the process of evaluation for lead-free, this alloy is mostly use in Europe and Asia. You can find more information in this link http://www.fctassembly.com"

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Hiram

#35255

Lead-free solder alloy: SN100C from AIM solder | 30 June, 2005

Thank you all for the information...

Hiram

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Jason Fullerton

#35388

Lead-free solder alloy: SN100C from AIM solder | 8 July, 2005

I've tested boards with SN100C HAL finish, and wetting to the PCB finish was poor at best, using a no clean SAC305 paste.

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#35392

Lead-free solder alloy: SN100C from AIM solder | 8 July, 2005

Dear Hiram, Thanks for your interest in SN100C. FCT Assembly is a licensed manufacturer of SN100C from Nihon Superior for North America. We have the alloy in 5 application labs- FCT (CO), Vitronics (NH), Technical Devices (CA), Electrovert (MO), and at the American Competitiveness Institute (ACI in Philadelphia). I will be happy to send you my cd containing process information, reliability data, and comparisons to the SAC alloys. bgilbert@fctassembly.com

Regards, Bob

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#35395

Lead-free solder alloy: SN100C from AIM solder | 8 July, 2005

Hi Jason, Did the SAC paste wet other board finishes adequately? I have seen no issues to date with solderability of SN100CL HASL boards with our No Clean pastes.

Regards, Bob

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GS

#35407

Lead-free solder alloy: SN100C from AIM solder | 8 July, 2005

Hi Bob,

by comparing HASL finisch made by SAC (ie305)and HAL finisch made by SN100 have you seen any difference in terms of copper dissolution on pad or PTH ? I have seen microsection's photos showing that by using SAC305 after one pass through HASL process it takes away about 4 micromillimeter of copper, after second HASL pass (done just as a test) additinal >2 micromillimeters have been "eaten" reducing so the amount of copper thikness.

I know they are going to test also HASL by using SACX307.

It will be good to know if some one already made HASL tests by using SN100C (N-Superior)

Many Thanks

GS

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#35425

Lead-free solder alloy: SN100C from AIM solder | 11 July, 2005

Yes, there have been many issues with the fast dissolution of copper by the SAC305 alloy. In fact, there are companies who have disqualified it for repair operations due to loss/thinning of the pads. SN100C dissolves copper much slower than SAC305 and so can be used in processes where the joint is exposed to molten lead free solder for longer than 10 seconds. Even wave soldering can have issues with SAC305 copper dissolution as detailed on the FCT Reliability cd (available upon request) on tests performed independently by Kyoden and Apollo Seiko. Regards, Bob

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Chris Ong

#35426

Lead-free solder alloy: | 11 July, 2005

There are other solder around in the market.

Have you all visited the Asahi solder for low costing compared to other solder alloy.

Website data :www.asahisolder.com

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#35428

Lead-free solder alloy: | 12 July, 2005

Sorry to contradict your suggestion but the Asahi 300 series alloys contain indium which is both very expensive and has very limited availability.

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Chris Ong

#35432

Lead-free solder alloy: | 12 July, 2005

Hi Bob,

I heard that they have low temperature solder that is able to tackle heat sensitive component.

Some of my industrial friend also mentioned that they some sort of low cost material alloy -SCS7?? Is that true?

Thanks Chris

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#35500

Lead-free solder alloy: | 14 July, 2005

Chris, The Asahi SCS7 is Asahi's attempt at copying the SN100C and is a tin/copper/silicon alloy that melts at 227C so no, it is not a low temperature lead free alloy.

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Brian

#35567

Lead-free solder alloy: | 15 July, 2005

If you do SMT with an SAC alloy, and the Wave Solder with SN100C, what is the impact of accidentally reworking the through hole parts with an SAC alloy wire solder? Or reworking the SAC alloy with an SN100C wire solder?

Brian

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GCampbell

#35754

Lead-free solder alloy: SN100C from AIM solder | 27 July, 2005

CEMCO Uk have done testing using SACX0307, SAC305 and Sn/Cu/Ni. The copper dissolution tests (report available) conducted at CEMCO showed that the lowest copper erosion rate was achieved by SACX0307.

Regards

Gerry

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GS

#35764

Lead-free solder alloy: SN100C from AIM solder | 27 July, 2005

Hi Gerry,

do you think it is possile to get copy of the report?

Thanks and Regards

GS

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Carl

#35767

Lead-free solder alloy: SN100C from AIM solder | 27 July, 2005

Any issues in your experience using SAC305 for reflow and SN100C for wave on ENIG pcbs? I've seen the CD, but there's not much specific data regarding ENIG pcbs

Thanks

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#35786

Lead-free solder alloy: | 28 July, 2005

Brian, The rework process you question is exactly what is being performed in the industry today, mostly in Asia. Boards wave soldered with SN100C will have been reflow soldered with SAC305 alloy. These boards are then repaired with either SN100C or SAC305 alloy. No reliability issues have been reported in the 5 plus years of production (>300 million boards to date). I also have some reliability data for joints made with these 2 alloys wave soldered and then repaired with both. All of these results look good. The issue we see is mixing SN63 with any of the lead free alloys. Sn63 wave soldered joints repaired with lead free and lead free wave soldered joints repaired with SN63 show some incompatibility in our thermal cycling and cross sectioning tests. A cd with these reports is available upon request. Regards, Bob

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#35788

Lead-free solder alloy: SN100C from AIM solder | 28 July, 2005

Hello Carl, The main reason there is little information on lead free soldering to ENIG is because most of the lead free soldering to date has been Japanese consumer products. To keep costs down, the major surface coating used has been OSP copper. It is the cheapest and adequate in the high volume low mix process in Asia where boards are soldered soon after they are made. As lead free transitions to North America, the "higher reliability" products left will tend to use finishes with a longer shelf life and ENIG and LF HASL are the 2 options that meet that requirement. As stated many times, IF the ENIG is applied correctly, solderability after multiple heat cycles will be maintained.

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GS

#36030

Lead-free solder alloy: SN100C from AIM solder | 10 August, 2005

Hello Gerry,

any news about possibility to read CEMCO report ?

Thank you and Regards

GS

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Geoff

#36059

Lead-free solder alloy: SN100C from AIM solder | 10 August, 2005

Nihon superior could not provide any written aprovals but In asia.......... Sony- SN100C in use for car and home audio applications. Panasonic- SN100C in use for DVD, VCR, battery, and home appliances applications. Pioneer- SN100C in use for everything except car audio JVC- SN100C in use for professional audio Samsung- SN100C in use in Korea Alcoa Fujikura- SN100C in use in Thailand

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Hiram

#36127

Lead-free solder alloy: SN100C from AIM solder | 15 August, 2005

Hi Geoff,

This sounds interesting...Where did you get this info from? I would like to add this data in an internal report...

I appreciate it.

Regards, Hiram

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#36129

Lead-free solder alloy: SN100C from AIM solder | 15 August, 2005

Hello Hiram, SN100C is in over 1000 machines worldwide and as the Nihon Superior licensee holder for North America, FCT Assembly can supply you a list of users worldwide. In addition to the Japanese approvals, FCT Assembly has a number of U.S. approvals. Please e-mail me you contact information: bgilbert@fctassembly.com

Regards, Bob Gilbert

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michael

#37549

Lead-free solder alloy: | 2 November, 2005

Bob Gilbert, could you pls email me the reliability data for joints made with SN00C and SAC305 alloy. my email: michael_wkk@263.net

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