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August 2015

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Subject:
From:
Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 17 Aug 2015 15:49:32 -0400
Content-Type:
text/plain
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caution, you might get trapped moisture - potential for bridging. 
(polyimide do like moisture a lot).  would be a reject if it fall on my
hands.  my 1.4 cents.
      jk

> Chuck,
>
>    Yes, It does appear to be an FPC Product, Rigid Flex assembly.   The
> cross section revealed an unusual layer stack with different shades in
> the laminate.  Some with glass bundles and others without glass.   The
> large voids appear to be concentrated on the layers with non-glass
> laminate regions.   Perhaps a polyimide layer.   I don't have the
> vendor stack up information, thickness nor material construction.
>
> Victor,
>
> From: [log in to unmask] [mailto:[log in to unmask]]
> Sent: Monday, August 17, 2015 11:28 AM
> To: TechNet E-Mail Forum; Hernandez, Victor G
> Subject: Re: Re: [TN] Pros & Cons om laminate VOIDS
>
> And,
>
> Is this a flex circuit?  What is the construction?
> I don't see any glass fiber and the layers appear to be connected by an
> adhesive.
>
> I think more information is required.  It does appear to be a long way
> from the patients heart.
>
> Chuck
> ________________________________
>
> [cid:[log in to unmask]]
>
> Charles W. Brummer | 3M Manufacturing Engineer
> 3M Electronic Solutions Division
> 3M Canoga Park, 8357 Canoga Ave. | Canoga Park, CA 91304
> Office: 818 734 4930
> [log in to unmask]<mailto:[log in to unmask]> |
> www.3M.com<http://www.3m.com/>
>
>
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>
>
> From:        "Victor Hernandez"
> <[log in to unmask]<mailto:[log in to unmask]>>
> To:        <[log in to unmask]<mailto:[log in to unmask]>>
> Date:        08/17/2015 04:19 AM
> Subject:        [EXTERNAL] Re: [TN] Pros & Cons om laminate VOIDS
> Sent by:        TechNet <[log in to unmask]<mailto:[log in to unmask]>>
>
> ________________________________
>
>
>
> How can on call it an anomaly/defect if one is unable to discern the
> anomaly/defect.
>
> Victor,
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer
> Sent: Friday, August 14, 2015 6:05 PM
> To: [log in to unmask]<mailto:[log in to unmask]>
> Subject: Re: [TN] Pros & Cons om laminate VOIDS
>
> With this size range, I would be concerned. Nice sections!
>
> Wayne
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Friday, August 14, 2015 5:26 PM
> To: [log in to unmask]<mailto:[log in to unmask]>
> Subject: Re: [TN] Pros & Cons om laminate VOIDS
>
> Hi Victor,
>
> Here you go:
>
> http://stevezeva.homestead.com/Laminate_voids.pdf
>
> Steve
>
> On Fri, Aug 14, 2015 at 12:23 PM, Victor Hernandez <
> [log in to unmask]<mailto:[log in to unmask]>> wrote:
>
>> Fellow TechNetters:
>>
>> What are the Pros N Cons with LF laminate voids. Want to hear what
>> the community thinks. I will upload photos to Steve Gregory shortly.
>>
>> Victor,
>>
>> Steve Gregory
>>
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