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September 2006

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Subject:
From:
Eric CHRISTISON <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Eric CHRISTISON <[log in to unmask]>
Date:
Wed, 13 Sep 2006 09:55:48 +0100
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Thanks Rudy,

Why do you say it will worsen the problems we see with water?

Stop press - I have been authoritatively told this morning that if we
want to remove particles of 10 microns diameter from the surface then
we'll have to clean at a frequency of 40 MHz. Is there such a
relationship between minimum particle removed and frequency or is my
advisor talking nonsense?

Regards,


R Sedlak wrote:
> Eric:  Whereas IPA may well give you a good clean, it will probably
> worsen the problems you are seeing with water...
>
> And then there might be some minor issues with flammability, and the
> fact that you will need an explosion proof US cleaner...
>
> Other than that, it is a GREAT IDEA... :-)
>
> Rudy Sedlak
> RD Chemical Company
>
> */Eric CHRISTISON <[log in to unmask]>/* wrote:
>
>     We're currently ultrasonically cleaning some plastic parts in DI water
>     and may be incurring some microscopic damage to the surface.
>
>     We've been directed to use IPA rather than DI water as a cleaning
>     medium
>     to give a gentler clean to reduce damage.
>
>     Does this sound like a good plan and would there be any other fluids
>     that would be more suitable?
>
>     Regards,
>
>
>     --
>     Eric Christison Msc
>     Mechanical Engineer
>     Home Personal, Communication Sector
>     Imaging Division
>
>     STMicroelectronics (R&D) Ltd
>     33 Pinkhill
>     Edinburgh EH12 7BF
>     United Kingdom
>
>     Tel: +44 (0)131 336 6165
>     Fax: + 44 (0)131 336 6001
>
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--
Eric Christison Msc
Mechanical Engineer
Home Personal, Communication Sector
Imaging Division

STMicroelectronics (R&D) Ltd
33 Pinkhill
Edinburgh EH12 7BF
United Kingdom

Tel:    +44 (0)131 336 6165
Fax:    + 44 (0)131 336 6001

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