TECHNET Archives

April 2018

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 19 Apr 2018 12:24:15 +0000
Content-Type:
text/plain
Parts/Attachments:
text/plain (1 lines)
Dell - Internal Use - Confidential  



Was the photo uploaded to Steve Geogory.   I was not able to open the drive google url link.  Curious to the photo of IPsep.



Victor,



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman

Sent: Thursday, April 19, 2018 6:57 AM

To: [log in to unmask]

Subject: Re: [TN] R: [TN] R: [TN] PCB failure



Hi Gil - if you have the resources, you should put that cross section in the SEM and look for possible resin smear on the inner layer/PTH interface.

Resin smear could cause the defect you are seeing.



Dave Hillman

Rockwell Collins

[log in to unmask]





On Thu, Apr 19, 2018 at 4:02 AM, Zilber Gil <[log in to unmask]> wrote:



> Thanks

> It is a leaded hand soldering of that device. I will check if the 

> other failed location has hand soldering also. The material is a high 

> tg material (Isola 370 HR).

> Regards,

> Gil

>

>

>

> נשלח מסמארטפון ה-Samsung Galaxy שלי.

>

>

> -------- הודעה מקורית --------

> מאת: SALA GABRIELE <[log in to unmask]>

> תאריך: 19.4.2018 10:46 (GMT+01:00)

> אל: 'TechNet E-Mail Forum' <[log in to unmask]>, Zilber Gil < 

> [log in to unmask]>

> נושא: R: [TN] R: [TN] PCB failure

>

> Gil,

>

> you could show the picture to TNetters by mailing  it to Steve Gregory 

> [log in to unmask] whom very kindly support us when we need to attach 

> picture (many thank Steve for you service) so all the TNetters will 

> see the picture.

>

> I have seen your picture, yes it is a IPS (Inner Plane Separation) 

> from PTH.

> It may be due to thermal stress in Z assy, but why ?

> You made baking to PCB so it should not be a matter of internal over 

> pressure due to moisture blow-off.

>

> Or may be too low Tg of laminate or high CTE in Z assy ?

> Are you running Lead Free Reflow ?

>

> Etc...

> Gabriele

>

>

> -----Messaggio originale-----

> Da: TechNet [mailto:[log in to unmask]] Per conto di Zilber Gil

> Inviato: giovedì 19 aprile 2018 10:27

> A: [log in to unmask]

> Oggetto: Re: [TN] R: [TN] PCB failure

>

> Thanks Gariele,

> The PCB is new, and it was baked before assembly.

> Thanks,

> Gil

>

>

>

> נשלח מסמארטפון ה-Samsung Galaxy שלי.

>

>

> -------- הודעה מקורית --------

> מאת: SALA GABRIELE <[log in to unmask]>

> תאריך: 19.4.2018 10:07 (GMT+01:00)

> אל: [log in to unmask]

> נושא: [TN] R: [TN] PCB failure

>

> Hi Gil,

>

> did you handled correctly PCB against moisture absorption ? Like guide 

> lines of IPC-1601A ?

> Shelf life of your PCB ?

> Any Baking before reflow?

>

> Gabriele

>

> PS: no picture is attached

>

> -----Messaggio originale-----

> Da: TechNet [mailto:[log in to unmask]] Per conto di Gil ZIlber

> Inviato: giovedì 19 aprile 2018 09:27

> A: [log in to unmask]

> Oggetto: [TN] PCB failure

>

> Hello Tech,

> We encounter a PCB discontinuing. Cross section shows conductor 

> separation from TH.

> The PCB manufacturer claims it is due to overheating during assembly. 

> To me, it looks like bad PCB manufacturing.

> Please look at the picture and give me your feedback.

> Thank you

>

>

> ---

> Questa e-mail è stata controllata per individuare virus con Avast 

> antivirus.

> https://www.avast.com/antivirus

> The information contained in this communication is proprietary to 

> Israel Aerospace Industries Ltd. and/or third parties, may contain 

> confidential or privileged information, and is intended only for the 

> use of the intended addressee thereof. If you are not the intended 

> addressee, please be aware that any use, disclosure, distribution 

> and/or copying of this communication is strictly prohibited. If you 

> receive this communication in error, please notify the sender immediately and delete it from your computer.

>

>

> The information contained in this communication is proprietary to 

> Israel Aerospace Industries Ltd. and/or third parties, may contain 

> confidential or privileged information, and is intended only for the 

> use of the intended addressee thereof. If you are not the intended 

> addressee, please be aware that any use, disclosure, distribution 

> and/or copying of this communication is strictly prohibited. If you 

> receive this communication in error, please notify the sender immediately and delete it from your computer.

>

>


ATOM RSS1 RSS2