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
> >
> >
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