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March 2004

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Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 9 Mar 2004 05:14:48 -0800
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        One thing to know is that AR can be coated to patch UR but not the
other way around. Patching AR with UR creates a mix that takes too long to
dry, stays soft. So to switch from UR to AR is recommended.
        Regards,
        Ramon

> -----Original Message-----
> From: - Bogert [SMTP:[log in to unmask]]
> Sent: Monday, March 08, 2004 4:55 PM
> To:   [log in to unmask]
> Subject:      [TN] Pros and Cons on Type UR vice Type AR Conformal Coating
>
> As a Class 3 customer we are considering mandating transition from Type UR
to Type AR conformal coating, to make it easier to replace failed
components.  Are there any Class 3 users of Type AR coating?  What is track
record for using Type AR?  Are there any compatibility issues with certain
types of solder masks?  Any input you have would help.  Another advantage
with AR would be for returned equipment.  The OEM could remove all the
coating from an assembly using alcohol, then perform
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> -----------------------------------------------------
> bed-of-nails testing to quickly identify failed components.

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