I would look for another supplier. It sounds that your current one does not
have very good process controls and that their final inspection steps are
lacking. There are QT shops that might be able to get you enough parts
quickly to meet your commitments until you can have the parts replaced.
Scott B. Westheimer
----- Original Message -----
From: "Mumtaz Bora" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, September 18, 2005 5:38 AM
Subject: Re: [TN] Rework for Delaminated PWBs
> Steve and All, I rejected the shipment and asked for replacement with good
> boards , not reworked boards, but supplier is unable to provide quick
> replacement. the PWB is 1+4+1 used for cellphone application.
>
>
>
>
> At 06:28 AM 9/16/2005 -0500, Stephen R Gregory wrote:
>> I haven't woke-up yet, strike that last
>> question.
>>
>> You said you already recieved the
>> boards...
>> so you would know if you got new ones or
>> not.
>>
>> Kind regards,
>>
>> -Steve Gregory-
>> Senior Process Engineer
>> LaBarge Incorporated
>> Tulsa, Oklahoma
>> (918) 459-2285
>> (918) 459-2350 FAX
>>
>>
>>
>>
>>
>> Stephen R Gregory/LABARGE@LABARGE
>> Sent by: TechNet <[log in to unmask]>
>> 09/16/2005 06:16 AM
>> Please respond to TechNet E-Mail Forum
>> <[log in to unmask]>; Please respond to Stephen R Gregory
>>
>> To: [log in to unmask]@SMTP@Exchange
>> cc: (bcc: Stephen R Gregory/LABARGE)
>> Subject: Re: [TN] Rework for Delaminated PWBs
>>
>>
>> Mornin'
>> Everybody!
>>
>> I have
>> the pictures that Mumtaz sent me posted now. Go to:
>>
>>
>>http://www.stevezeva.homestead.com and click on "Picture Page 2"
>> and look
>> at; "Blister 1, Blister 2, After Bake 1, and After Bake 2".
>>
>> Boy,
>> that's some SERIOUS delamination! I don't know enough to say
>> if the
>> rework that your supplier is proposing is acceptable, but my first
>> question
>> would be is why would they send you boards that are not cured?
>>
>> If they
>> sent you boards that are that undercured, what else is wrong with
>> these
>> boards?
>>
>> I would
>> have a very hard time accepting these boards. Which brings up
>> another
>> question, if you say you won't accept them and that you want new
>> boards,
>> how will you know that you won't get the same boards that your
>> supplier
>> has "reworked"?
>>
>> Kind
>> regards,
>>
>> -Steve
>> Gregory-
>> Senior
>> Process Engineer
>> LaBarge
>> Incorporated
>> Tulsa,
>> Oklahoma
>> (918)
>> 459-2285
>> (918)
>> 459-2350 FAX
>>
>>
>>
>>
>>
>> Mumtaz Bora
>> <[log in to unmask]>
>> Sent by: TechNet
>> <[log in to unmask]>
>> 09/15/2005 08:20
>> PM
>> Please respond to
>> TechNet E-Mail Forum <[log in to unmask]>; Please respond to Mumtaz Bora
>> <[log in to unmask]>
>>
>> To:
>> [log in to unmask]@SMTP@Exchange
>> cc: (bcc: Stephen R
>> Gregory/LABARGE)
>> Subject: [TN] Rework for
>> Delaminated PWBs
>>
>>
>> Dear
>> Technetters,
>>
>>
>> We have
>> received a large batch of PWBs that is showing delamination after
>> reflow at
>> peak temp. 230C. Laminate is high Tg - 170C.
>>
>> Supplier
>> is proposing to perform the following rework -- on these boards
>> instead
>> of providing replacement parts.
>>
>> Oven
>> bake at 190C for 2.5 hours followed by second bake at 150C for 2
>> hours at
>> 6kg/cm2 pressure. Will this guarantee a full cure?
>>
>> I am
>> concerned about latent failures and layers opening up as full cure was
>> not
>> achieved the first time.
>>
>> Any
>> inputs from the forum will be appreciated.
>>
>> I will
>> request Steven Gregory to place the image of delamination on his
>> website.
>> Have a great weekend.
>> Thank-you
>>
>> Mumtaz
>>
>> D/ 252
>> - SMT Process and Component Quality
>> Bldg.
>> V238E
>> Voice
>> (858)-882-1967
>> Fax
>> (858)-882-3126
>> Page
>> (858)-635-1180
>> Cell:
>> (858) -449-7054
>> email:
>> [log in to unmask]
>>
>>Kyocera-Wireless Corp.
>> 10300,
>> Campus Point Drive
>>
>>
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>>__________________________________________________________________
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>>
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>>
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>>__________________________________________________________________
>> This message may contain information that
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>> recipient, you may not copy, use or deliver this message to anyone. In
>> such event, you should destroy the message and kindly notify the sender
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>>847-615-7100 ext.2815
>>-----------------------------------------------------
>
> Thank-you
>
> Mumtaz
>
> D/ 252 - SMT Process and Component Quality
> Bldg. V238E
> Voice (858)-882-1967
> Fax (858)-882-3126
> Page (858)-635-1180
> Cell: (858) -449-7054
> email: [log in to unmask]
> Kyocera-Wireless Corp.
> 10300, Campus Point Drive
>
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> for additional information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> -----------------------------------------------------
> San Diego, Ca 92121,USA
>
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