Victor, Could it be an inclusion in the PI? And, We do occasionally see voids in Polyimide films. Chuck 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] | www.3M.com This message (including any attachments) may contain material, non-public information or proprietary information and is for the intended recipients only. If you are not the intended recipient, you should notify the sender and delete this message. Any disclosure, copying, or use of this information is strictly prohibited and may subject you to legal liability. From: <[log in to unmask]> To: <[log in to unmask]>, <[log in to unmask]> Cc: <[log in to unmask]> Date: 08/17/2015 10:00 AM Subject: [EXTERNAL] RE: Re: [TN] Pros & Cons om laminate VOIDS 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 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] | www.3M.com This message (including any attachments) may contain material, non-public information or proprietary information and is for the intended recipients only. If you are not the intended recipient, you should notify the sender and delete this message. Any disclosure, copying, or use of this information is strictly prohibited and may subject you to legal liability. From: "Victor Hernandez" <[log in to unmask]> To: <[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]> 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] 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] 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]> 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 > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ > -- This email and any attachments are only for use by the intended recipient(s) and may contain legally privileged, confidential, proprietary or otherwise private information. Any unauthorized use, reproduction, dissemination, distribution or other disclosure of the contents of this e-mail or its attachments is strictly prohibited. If you have received this email in error, please notify the sender immediately and delete the original. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. 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