It was not mentioned whether it was a problem only in Far East. I think he would have mentioned that if that had been the case. Therefore, I think it is a worldwide problem, but I do not know for sure. Per-Erik -----Ursprungligt meddelande----- Från: Edward Szpruch [mailto:[log in to unmask]] Skickat: den 27 april 2005 10:14 Till: [log in to unmask] Ämne: Re: [TN] ENIG vs Hard Gold This phenomena was reported by one of ENIG chemistry suppliers as problem only in Far East in areas with very high air pollution. I do not know Mr. Nielsson, but the obvious question is if such problem was defined geographically or it was found as worldwide. Edward Edward Szpruch Eltek Ltd P.O.Box 159 ; 49101 Petah Tikva Israel Tel ++972 3 9395050 , Fax ++972 3 9309581 e-mail [log in to unmask] web site : www.eltekglobal.com > -----Original Message----- > From: Tegehall Per-Erik [SMTP:[log in to unmask]] > Sent: ã àôøéì 27 2005 8:49 > To: [log in to unmask] > Subject: Re: [TN] ENIG vs Hard Gold > > Claus Würtz Nielsson from Nokia Mobile Phones published a paper at the > IMAPS Nordic Conference last year entitled "The evolution of surface > finishes in mobile phone applications". He reported that they have had > corrosion problems with ENIG coated key pads. By using a new formulation > of the ENIG process (higher P content and less porous Au coating) the > corrosion stability was improved. Nevertheless, he concluded that "It > becomes more and more clear that the thin ENIG in the future not will be > able to address the need for higher wear resistance in the extreme part of > the product segments as gaming devices and phones used by workmen or > during sporting activities". > > Per-Erik Tegehall > IVF > > -----Ursprungligt meddelande----- > Från: Gerard O'Brien [mailto:[log in to unmask]] > Skickat: den 25 april 2005 15:33 > Till: [log in to unmask] > Ämne: Re: [TN] ENIG vs Hard Gold > > > The POINT of this test was to examine if the use of ENIG as a switch > membrane interface was viable. The testing was performed to industry > protocol. There were no additional stress conditions and multiple > suppliers > were tested. Of course if you are going to use ENIG as a switch pad > interface metal in a corrosive environment or under water you may have > some > slight issues - not least of which is the operator pushing the button. > Bottom line form the test was that for NORMAL use environments, such as > cell > phones, radio's etc, the surface passed with flying colors - read the > document. > > > > > -----Original Message----- > From: David Douthit [mailto:[log in to unmask]] > Sent: Monday, April 25, 2005 7:54 AM > To: [log in to unmask] > Subject: Re: [TN] ENIG vs Hard Gold > > Victor, > > Not so great info!! This info can not be accurately correlated to "in > service " use because it does not take into account environmental > conditions. Temperature, humidity, contamination (airborne and other > forms) vibration and various combinations will drastically alter the > "life" of the key pads. > > This test can give a false feeling of security! > > David A. Douthit > Manager > LoCan LLC > > Victor G. Hernandez wrote: > > >Great info! What is the 1.5 million cycles equate to in usage time. > > > >Victor, > > > >-----Original Message----- > >From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerard O'Brien > >Sent: Monday, April 25, 2005 7:14 AM > >To: [log in to unmask] > >Subject: Re: [TN] ENIG vs Hard Gold > > > >Alistair - as part of the 4552 specification testing, we ran ENIG at 2 > >microinches for 1.5 million cycles for a keypad type application. We > >stopped > >because the membrane was breaking down but not the ENIG surface. The > >data > >can be found in the tech paper that is in the appendix of IPC-4552 > > > >Regards > > > > > >Gerard O'Brien > >Photocircuits Corporation > >Co-chairman 4-14 > > > >-----Original Message----- > >From: Alistair Murray [mailto:[log in to unmask]] > >Sent: Monday, April 25, 2005 6:51 AM > >To: [log in to unmask] > >Subject: [TN] ENIG vs Hard Gold > > > >Hi to everyone, > > > >Could someone please let me know or indicate where I can obtain > >information on the relative performances of ENIG and Hard Gold in > >keyboard applications? > > > > > > > >Many thanks in anticipation. > > > > > > > > > > > > > > > >Alistair Murray > > > >Artetch Circuits Ltd > > > >UK > > > > > >--------------------------------------------------- > >Technet Mail List provided as a service by IPC using LISTSERV 1.8e > >To unsubscribe, send a message to [log in to unmask] with following text > >in > >the BODY (NOT the subject field): SIGNOFF Technet > >To temporarily halt or (re-start) delivery of 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