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May 2009

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TechNet E-Mail Forum <[log in to unmask]>, Karen Tellefsen <[log in to unmask]>
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Tue, 5 May 2009 13:59:03 -0500
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You need to contact him at [log in to unmask] 
It is not a free paper, but whatever the price it is cheap.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Karen Tellefsen
Sent: Tuesday, May 05, 2009 1:32 PM
To: [log in to unmask]
Subject: Re: [TN] What does HIGH GRADE FR-4 mean?

Do you have a reference for Werner's paper?

Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069



 

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Subject 
                                       Re: [TN] What does HIGH GRADE
FR-4  
             05/05/2009 01:39          mean?

             PM

 

 

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Hello, Harris,
You are correct that the customer (or circuit interface design engineer)
should provide the specific slash sheet describing the desired laminate
properties from IPC 4101B, as well as a description of the surface
finish as specified in IPC 4552, 4553, etc. Werner Engelmaier has an
excellent White Paper that includes everything that should be on a given
PWB drawing.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Harris Dy
Sent: Tuesday, May 05, 2009 12:23 PM
To: [log in to unmask]
Subject: [TN] What does HIGH GRADE FR-4 mean?

Hi All,

Can anyone define High Grade FR-4?

I think it's a vague requirement that I see on customer drawing. Is this
something that should be obsolete now because today customer should
really provide the properties of the laminate that they want to use...
eg Tg, Td, Dk.

Can anyone shed some light?

Thanks,
Harris




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