immersion tin

"immersion tin" search results in the Electronics Forums



2155 result s found for "immersion tin" in the Electronics Forums

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Suppplier of Immersion Tin placting solution in North America

Aug 31, 2017 | Suppplier of Immersion Tin plating solution in North America Thank you Amalia for your reply but we are not looking any metals for pcb, we are looking specially Tin plating solution for plating purpose. If you do carry this please give your contact info. Regards, Hetal

Suppplier of Immersion Tin placting solution in North America

Aug 3, 2017 | Suppplier of Immersion Tin plating solution in North America

Suppplier of Immersion Tin placting solution in North America

Aug 3, 2017 | Suppplier of Immersion Tin plating solution in North America Try: * RD Chemical [ http://rdchem.com/chemposit-sn-rd-51.html ] * MacDermid [ http://electronics.macdermidenthone.com/products-and-applications/printed-circuit-board/final-finishes/immersion-tin/ ] * Technic [ https://www.technic.com/applications/pcb/chemistry/final-finishes-2016 ] * MG Chemicals [

Suppplier of Immersion Tin placting solution in North America

Aug 3, 2017 | Suppplier of Immersion Tin plating solution in North America Hello Everyone, Does any one know supplier of Immersion Tin plating solution in North America? Thank you in advance.

Regarding the choosing of right Suface Finishing

Apr 29, 2015 | I have experience of Immersion silver and it's even more sensitive for all disadvantages mentioned above than Immersion tin. You can not go wrong with ENIG. It's little more expensive but in the end you save some bucks when you don't have to rework or scrap boards.

Regarding the choosing of right Suface Finishing

Apr 29, 2015 | thankyou for you answer dude. As you mentioned in your answer that immersion tin finishing gonna cause many problems. So, immersion Tin option is ruled out for my purpose. So, immersion Silver is the option left for my purpose But, I have checked for the pricing of immersion silver and immersion tin and i came to know that cost of immersion silver is very high compared to Immersion Tin. So, Can you suggust me any other finishings apart from immersion silver & ENIG for my purpose. Regards, Anirudh THABJUL

Regarding the choosing of right Suface Finishing

Apr 29, 2015 | Immersion tin is very sensitive for handling, scratches, storage condition and time, thermal influence and washing. You will get problems in second reflow if you have double sided PCB with immersion tin surface finish.

Regarding the choosing of right Suface Finishing

Apr 28, 2015 | thankyou for your answer. I came to know that "ENIG/ENEPIG is much costlier than Immersion Silver and Immersion Tin. So, my company doesn't allow me to use ENIG/ENEPIG". So, i will suggust my company to use Immersion silver or Immersion tin. Regards, Anirudh THABJUL

Regarding the choosing of right Suface Finishing

Apr 27, 2015 | finish" blocks corrosive element in the environment At the end of the day, ENIG is a good choise of Electroless Nickel Immersion Gold (ENIG, ENEPIG) Immersion Silver, Immersion Tin and Organic Solderabilty Preservatives OSP

Thiourea exposure in manual soldering of immersion tin PCBs

Jun 1, 2014 | Thiourea exposure in manual soldering of immersion tin PCBs Thank you for your reply davef. Although the US restriction, I think that there are plenty of users of immersion tin in Americas, mainly low-volume fabs that do not plan to outsource finishing, or do not plan or can not invest in a HASL. If we restrict use of all hazard potential chemicals, we volatiles released with heating from soldering iron in manual soldering assembly of immersion tin plated PCBs? Thank you very much. Regards.

Thiourea exposure in manual soldering of immersion tin PCBs

Jun 1, 2014 | Thiourea exposure in manual soldering of immersion tin PCBs Eurolanders and Asians are the primary users of immersion tin. In the US, the use of immersion tin is restricted due to the concern over the thiourea that used in tin plating process. Thiourea is a suspected carcinogen. I’m inclined to say, “aww, assemblers don’t need to concern themselves with a

Thiourea exposure in manual soldering of immersion tin PCBs

Jun 1, 2014 | Thiourea exposure in manual soldering of immersion tin PCBs Hello to everybody in this forum, I would like to know any information that you kindly may have about the following subject: We very often do manual soldering assembly of immersion tin finished PCBs. Since thiourea is used in the formulation of the immersion tin plating solution, I have big

Fiducials

Jul 6, 2010 | What type of finish are the PCB's? HASL, tin immersion, silver immersion,........we've seen all the above problems with HASL finished boards. Usually either reheating w/ a soldering iron or "burnishing" with a scotch brite pad has worked for us.

Cleaning Copper Surface

Apr 15, 2010 | Will this work for Tin Immersion plating or does anyone have suggestions on what will work?

PCB Pad become brownish after IR reflow

Sep 17, 2009 | The colour you see on the pads is tin/copper intermetallic layer. In your reflow the immersion tin coating and the copper pad underneath react to form in intermetalic layer. The effect is worse the hotter the pcb or area of the pcb gets. In IR reflow there will be quite a variation in the temps across your pcb so that is why the effect is in different parts of the pcb. You'll also find it's not as solderable as the original pads were. Keeping the pcb peak temp. between 230~240 will be better then 250 but it will still happen. This is an inherent problem with immersion tin coating.

HASL for small pitch devices

Nov 12, 2008 | Are there better options? Dude, EVERYTHING else is a better option. Gluing aluminum foil down to the bare copper would be a better option. ENIG (Electroless Nickel Immersion Gold), Immersion Silver, Immersion Tin, and OSP all provide flatter surfaces then HASL. However, there's a cost impact

lead free pcb plating?

Jul 28, 2007 | silver ALL are subject to corrosion in Battelle Class 3 environments (creep corrosion and/or fiber assisted electrochemical migration, blistering/peeling of conductive corrosion products, etc.) * Only SnPb HASL and immersion tin survive this environment ** SnPb HASL is not Pb-free ** Immersion tin has whisker risk - worse than immersion tin ** Cu dissolution ** Process control at fabricator ** Etc. NO PATH FORWARD at this Time! There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007, Alcatel-Lucent]: * ENIG, OSP, and immersion

Immersion White Tin

May 18, 2007 | Immersion White Tin Thank you for all your help. I help all my customers to understand more about the production of their parts. I even build free parts using 3-4 different finishes so they can evaluate the parts. In working with CM's many of them are always asking us to make the switch from Immersion white tin to ENIG, but when you have a customer that is accustomed to using white tin on all their parts, what could you do. Our CM lost out on many of their projects to another CM that has no problem assembling with white tin. I just don't think that when a customer asks for a certain finish, I myself

Immersion White Tin

May 16, 2007 | "twitchy"? I thought we were incompetent arse holes?

Immersion White Tin

May 14, 2007 | Immersion White Tin I am a CM, We do not use White tin either, we have had numerous solderability issues with this finish, We all agree when done correctly it is good, however I am at about 10% correct and 90% have issues. We currently use Immersion silver and Gold for ourr RoHS PCBAs I think white tin is fine

Immersion White Tin

May 14, 2007 | Immersion White Tin have converted our White Tin products over to Immersion Silver. Although some suppliers had consistently good product, we did not want to spend any additional time testing all of them. The switch to ImmAg was easier. Solderability!!! The CM in question has probably seen too many solder problems with White Tin in the past. We have had the same issues. To save us from spending too much time and money(verifying pure Tin plating thickness, Chemical leaching from the solder mask, improper storage and handling), we

Immersion White Tin

May 11, 2007 | Immersion White Tin I need everyone's input. I am in sales and marketing for a PCB shop. I need to know by a vote from any CM's why my CM does not like Immersion White Tin and my other resources have no problems or complaints using white tin. Every time an issue comes up we get fingers pointed directly to our white tin. Why is that? We do a lot of white tin for our customers and we get very good reviews on white tin and one so bad, that they want us to switch to immersion Gold. Please Help. Thank You

Immersion Tin on copper pads

Apr 4, 2007 | Immersion Tin on copper pads Dear All, anyone has experienced with thin layer of immersion tin (about 5 microns) on copper pads in term of long term reliability for first or second reliability studies. Any input will be greatly appriciated.. Thanks.

ImSn thickness

Feb 16, 2007 | IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards

Surface Solderability, Immersion Tin

Jan 11, 2007 | Surface Solderability, Immersion Tin Looking for a source to have an immersion tin finish evaluated for solderability?? Contact me direct 770-475-4576 Matt Kehoe

Qualification requirements for immersion tin finish

Aug 30, 2006 | Qualification requirements for immersion tin finish IPC-4554 - Specification for Immersion Tin Plating for Printed Circuit Boards

Qualification requirements for immersion tin finish

Aug 30, 2006 | Qualification requirements for immersion tin finish Are there any standard qualification/acceptance requirements for immersion tin board finish? J-STD-003 calls out temp/humidity preconditioning followed by solderability testing which is similar to what we have in our (ancient) internal documents. Our requirements were written at a time when Sn Pb HASL was one of the few choices, but temp/humidity preconditioning doesn't seem appropriate for immersion tin. J-STD-003 even hints that it isn't appropriate for some finishes. HASL, OSP, and immersion silver do fine but immersion tin and, to a lesser degree, ENIG have trouble with solderability

Pcb immersion tin thickness

Aug 9, 2006 | Pcb immersion tin thickness See "IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards" 3.2.1 Immersion Tin Thickness. The most common reason for solderability issues with the white tin surface coating during multiple thermal excursions is a thin white tin deposit. Florida Cirtech recommends 0 .65 microns, that has proven to be sufficient for at least one year shelf life and up to four passes in assembly. In almost every case I've seen, when the first pass or two solders fine and then problems arise, it is an insufficient thickness of white tin that was on the board. [S Wentz Florida Cirtech

Pcb immersion tin thickness

Aug 7, 2006 | Pcb immersion tin thickness . I did not have a sufficient tin layer 14 micron. What would be the recommended thickness of immersion tin for a pcb for at least three heat passes ??? Thanks for taking time to answer!!!!! Hi everyone, I am starting to use the lead free process and I had a few wetting problems (solder did not reach top side) at the wave soldering process once the pcb had passed our smt line (one heat pass). From what I understand, I have had a problem with the thickness of the tin layer on the pcb

Immersion Tin

May 2, 2006 | Immersion Tin In the past we have used immersion tin as an alternative for HASL. Our biggest problem was shelf life. The tin oxidized very rapidly. We switched to immersion gold and have had great success.

Immersion Tin

Apr 20, 2006 | Immersion Tin Immersion tin, if it is being correctly identified, is not a final surface finish for a bare board. White tin is typically the way a finish is refered to. Either way tin has gotten a very bad reputation via a couple satellite failures because of tin wiskers. Immersion silver, ENIG or OSP

Immersion Tin

Apr 20, 2006 | Immersion Tin Change finishes. immersion tin In my opinion is only suited ofr a single thermal excursion

Immersion Tin

Apr 20, 2006 | Immersion Tin Hi, I'm just wondering if someone have more information about board with immersion tin plating. I search in the archive but didn't find anything interesting. We try it, and we have difficulties to make a good solder joint with the wave. And with the reflow profile the joint seem dull and don

Immersion white tin wave soldering problem

Dec 16, 2005 | Thanks for your response.

Immersion white tin wave soldering problem

Dec 16, 2005 | Thanks for your response.

Immersion white tin wave soldering problem

Dec 16, 2005 | Immersion white tin wave soldering problem Heat cycles deplete the pure tin layer. Each solder cycle reduces the tin thickness by ~0.1 micron (4 uin). So, if you start with a thin imm tin coating you'll have problems after multiple heat cycles. Steve Wentz says, "In almost every case I've seen, when the first pass or two solders fine and then problems arise, it is an insufficient thickness of white tin that was on the board." There are at least two major imm tin technologies out there. Each has different plating thickness. Your board fabricator should be able to satisfy you that proper controls are maintained to ensure adequate plating

Propensity of Immersion Tin surface finish fo whiskers

Dec 12, 2005 | Propensity of Immersion Tin surface finish fo whiskers do you intend to use Immersion tin as a PCB surface finish ? Then Whisker concern is as below if you do not past your test pads, the pads will be stressed when probed on a ICT or a flying probe tester. This is a POTENTIAL for whiskers There is a lot of general whisker debate published

Propensity of Immersion Tin surface finish fo whiskers

Dec 12, 2005 | Propensity of Immersion Tin surface finish fo whiskers OK, I feel the need to jump in here. Bright Tin has the tendency to easily whisker, and is almost never used, except on some through-hole connectors, I believe. Matte Tin is much less susceptible to whiskering, although under the right stress conditions, it is not immune to it. Immersion Tin finish is a form of Matte Tin, I believe. Matte tin is a VERY common finish used on lots of components right now. Some chip caps have been matte tin since 1998!!! Stresses that are believed to cause whiskers are temperature cycles, humidity, and bends, scratches, etc. As far as white tin and grey tin

Propensity of Immersion Tin surface finish fo whiskers

Dec 10, 2005 | Propensity of Immersion Tin surface finish fo whiskers We believe imm tin suppliers say that their product does not whiskey, oops whisker, because they use 'white tin' not the 'gray tin' that causes whiskers. But as soon as you alloy their tin with SAC or any other high tin content solder, all bets are off. Your are then open to all the vararies of tin whisker formation. NASA maintains a web page on the whiskering issue http://nepp.nasa.gov/whisker/

Propensity of Immersion Tin surface finish fo whiskers

Dec 9, 2005 | Propensity of Immersion Tin surface finish for whiskers

Propensity of Immersion Tin surface finish fo whiskers

Dec 8, 2005 | Propensity of Immersion Tin surface finish fo whiskers during my researches for LF transition, a question being asked is -- why even consider immersion tin if it whiskers. does it really matter?, because during reflow, the Sn dissolves in the SAC solder alloy and does not exist in a "Sn whisker" formable form for a lack of suitable term. the real

Matte Sn Plating

Oct 25, 2005 | Could you be talking about immersion tin?

Immersion gold and BGAs

Aug 26, 2005 | Immersion gold and BGAs Where could I find more information regarding the double sided reflow and flux problems with white tin?

Immersion gold and BGAs

Aug 26, 2005 | The Immersion gold is not a problem with BGAs specifically but "black pad" which can be present anywhere. The unfortunate thing with BGAs is you cannot see it. Personally I hate white tin. It is okay for single sided boards running no-clean, but can be problematic with double sided reflows and aggressive fluxes. The thickness of tin is very critical such as the immersion gold process. I like immersion silver if I cannot use ENIG for pb free finish. We do have ENIG as our preffered finish and we have been lucky to never experience any black pad. Immersion gold and BGAs

Immersion gold and BGAs

Aug 26, 2005 | I have heard that there are problems using immersion gold on PCBs when working with BGAs. Is this correct? Is white tin more suitable? Immersion gold and BGAs

Low volume quality PCBs (how to)

Jul 15, 2005 | of solderability protection that we see are: * Hot Air Solder Leveled [HASL} * Electroless Nickel / Immersion Gold [ENIG] * Organic Solderability Protection [OSP] * Immersion tin * Immersion silver The latter three are proprietary processes. We can give you contacts if you'd like. HASL and ENIG have been

Plating Integrity

Jun 17, 2005 | Dave, The finish I'm most familiar with is the "white" tin by Omikron. Once the boards have been immersed the finish takes on much more of a white color however I have seen other immersion tin finishes where they are dull or bright in color. This is just speculation on my part but I'm thinking that it is just the chemical makeup of the particular tin bath that is installed by the manufacturer of the immersion tin.

Plating Integrity

Jun 17, 2005 | We have had some experience with the immersion tin. The appearance can be "bright" or "dull". Don't discount the fact that it is "bright" doesn't necessarily make it HASL. Furthermore, I personally have never heard of a board manufacturer "stripping tin" from a HASL board and reappling a HASL finish. That makes no sense to me. However, I know than can strip the tin from the immersion tin process and then reprocess the boards with any finish you desire. I would bet that if they stripped the tin they initially used a immersion tin process and when you haggelled with them they reproceesed

Plating Integrity

Jun 16, 2005 | Chris, From your email I am assuming you are using an immersion tin process. Is that correct? If so, I would highly recommend you talk to your board house about the amount of tin that is being deposited on your boards. If the tin deposit becomes very thin you could end up with copper migrating up through the tin as the board goes through heat cycles. The immersion tin process is a self limiting process whereby over a certain length of time the tin will no longer be deposited on the board. Having said that I know that there is a recommended time by most of the immersion tin people for the amount of time that the boards must be in their "bath" but I would caution you that it may not be long enough to put enough tin on your boards to survive the heat cycles. The other issue you could be facing is one of contamination. The company doing the immersion tin process must be very aware of all

White tin pcb, smt production

Mar 5, 2005 | the thickness (results were it was under spec)...we've since scratched the pcb supplier from our vendor list. I agree with dave, immersion silver might be a better way to go given the immersion tin limitations on number of heat cycles directly related to finish thickness. Gus White tin pcb, smt production

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