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November 2010

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From:
"Thayer, Wayne - IIW" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Thayer, Wayne - IIW
Date:
Mon, 8 Nov 2010 14:37:57 -0500
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Not so fast.  Which tolerance are you talking about--positional or hole diameter?  I agree that the hole diameter tolerance is basically meaningless for most purposes, but the position tolerance specifies the minimum annular ring as well!

Wayne Thayer

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Monday, November 08, 2010 2:13 PM
To: [log in to unmask]
Subject: Re: [TN] Micro Via Tolerance

+0/-.005" -- "May be plated shut" -- FHS is irrelevant for vias -- Cheers
-- Ian






"Harner, Chester" <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
11/08/2010 02:06 PM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
"Harner, Chester" <[log in to unmask]>


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[log in to unmask]
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Subject
[TN] Micro Via Tolerance






Hi All - We specify +-.003 tolerance for most plated holes.  I can't
find any reference to tolerance specification for Mico-Vias. +-.003
seems a bit loose for .005 dia holes produced by laser.



Chet Harner   Sr. Engineer   Crane Hydro-Aire PO Box 7722 Burbank Ca -
91510  818-526-2600 x3557 [log in to unmask]




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