Pete,

Are you sure you want "0.02ug NaCl eq/cm^2" or this a misprint and you are really trying for 0.2ug NaCl eq/cm^2???

The first is very expensive!!

David A. Douthit
Manager
LoCan LLC

[log in to unmask] wrote:

> Dear All,
>
> What would your recommendations be for equipment to measure board
> cleanliness under the following circumstances?:
>
> Number of boards = 10 pcs per month up to a total of 280 boards.
> Board size = typically VME - approx 9.5" x 6.5"
> Board type = FR4, Class 3, 10 or 12 layer ENIG or HASL finished.
> Assembled with 63/37 solder paste and water-soluble flux, reworked using
> Kester 63/37 cored solder with compatible w/s flux
> Other main residues would come from fingerprint oils and residues from
> stripping Humiseal off boards using Conformox or Forane.
>
> I am trying to set up a new capability here and am looking for the least
> expensive equipment that will reliably measure genuine cleanliness levels
> down to 0.02ug NaCl eq/cm^2. I can only justify equipment expenditure
> against this one small contract that involves a total of 280 boards, hence
> the need for cost-effective (aka low-cost) choices.  So far, I see that the
> Omegameter still features heavily in discussions on this topic - is it
> still a good tool to use, or is it's technology too old now to be capable
> of measuring accurately the high levels of cleanliness demanded by today's
> high-reliability electronics? Other options, like the Zero-Ion, or
> Concoat's Contaminometers, good as they seem to be, are several magnitudes
> more expensive and harder to justify as a result unless there's a good
> reason why less expensive options are not suitable.
>
> I could also use your recommendations on SIR test equipment.
>
> Thanks for any help you can offer.
>
> Peter
>
> ---------------------------------------------------
> Technet Mail List provided as a free 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 Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
> -----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a free 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 Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------