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As a matter of interest, what kind of paper do you use?
I would guess shiny is better than matt finish for example to stop
particulate contamination of the surface.
Also I would have thought (I may be wrong) that bleached paper may
contain halide ions for example.
I have interest in this area as I need to store ~500 boards after
cleaning for SIR testing.
The boards must be and stay v. clean.
Any hints or tips greatly appreciated.
Regards
Carl.
>>Reply to your message of 21/10/98 23:47
>We're getting them interleaved with paper and sealed ;
>Found that even better than just stacking them up with desiccant ; for
>few reasons .
>The desiccant and indicators have usually too localized effectiveness
;
>
>that's why Jim keeps the qty so low .
>The ESD bag is indeed a luxury ; but I suppose he's got a reason for it
>.
>To keep segments (ground?) of copper from picking up a charge, Jim ? .
>Did you measure it ; traced it ; or is it just one of the safe theories
>?
>For us with paper insulation and only the edge (insulated) contact we
>skipped it .
>Wrong ?
>
>> ----------
>> From: Jim Marsico 516-595-5879[SMTP:[log in to unmask]]
>> Sent: Thursday, 22 October 1998 3:12
>> To: [log in to unmask]
>> Subject: Re: [TN] Shelf Life/Storage for Bare PCB
>>
>> We require that all boards are individually wrapped in tarnish
>> inhibiting
>> paper, and placed in a sealed ESD bag with a humidity indicator and
>> desiccant.
>> (No more than 10 PWBs per bag.)
>>
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>>End of message
Dr. Carl Levoguer
CMMT
National Physical Laboratory
Queens Rd, Teddington, Middlesex.
TW11 0LW
Direct Line : +44 181 943 6263
Fax: +44 181 943 6453
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