Justin ,
If the materials and dimension are fulfill the requirements how can you made the judgment are related to the supplier caused the incident of solder ball .It may be related the storage environment ( moisture in the PCB ).
Alvin
----- Original Message ---
From: Justin Wu
To: 'Alvin Ling' ; [log in to unmask]
Sent: Wednesday, April 13, 2011 3:39 PM
Subject: RE: [TGAsia] Solder Ball
Hi Alvin,
Yes, the PCB layout was designed by our Engineering Team. I would like to know why I can't claim the PCB manufacturer. Any input?
Thanks and best regards,
Justin Wu
Utilux South China Ltd
Phone: +86-755-2850 7521
Fax: +86-755-2850 0927
E-mail Address: [log in to unmask]
------------------------------------------------------------------------------
From: TGAsia [mailto:[log in to unmask]] On Behalf Of Alvin Ling
Sent: Wednesday, April 13, 2011 3:31 PM
To: [log in to unmask]
Subject: Re: [TGAsia] Solder Ball
Justin ,
I have the quaestion who design the PCB layout from your engineering team or by PCB supplier . If the design from your team how you can claim the supplier ?
Alvin
----- Original Message -----
From: Justin Wu
To: [log in to unmask]
Sent: Wednesday, April 13, 2011 3:18 PM
Subject: Re: [TGAsia] Solder Ball
Thanks Mr. Zhao.
Yes, we have claimed to PCB manufacturer accordingly.
Thanks and best regards,
Justin Wu
Utilux South China Ltd
Phone: +86-755-2850 7521
Fax: +86-755-2850 0927
E-mail Address: [log in to unmask]
----------------------------------------------------------------------------
From: TGAsia [mailto:[log in to unmask]] On Behalf Of WM-FQA-Zhao ZiDe
Sent: Wednesday, April 13, 2011 2:59 PM
To: [log in to unmask]
Subject: Re: [TGAsia] Solder Ball
Dear Justin Wu:
From the photo, we can find the solder ball on topside PTH, due to solder mask in the PTH and caused the hot air chould not through the TH at the HASL process, if void the same question reoccur, the solder mask film need be revised. you can let the PCB manfuacture plant to enlarge the solder mask opening or plug the TH by solder mask.
Many Thanks,
Best Regards,
Zhao Zi De
QA Department
World Mastery Technology Limited
Tel:+86 769 85569149 Ext:862
Fax:+86 769 85262272
Email:[log in to unmask]
----- Original Message -----
From: Justin Wu
To: [log in to unmask]
Sent: Wednesday, April 13, 2011 12:08 PM
Subject: Re: [TGAsia] Solder Ball
Hi All,
We have found some solder balls inside TH on the PCB (See below photo), however there is no exact matching of the defect mentioned in IPC, but according to IPC-A-610 Clause 5.2.7.1, the solder ball is accepted if it is embedded in the solder resist. So, would you please share your experience in such case with me?
Thanks in advance!
Best regards,
Justin Wu
Utilux South China Ltd
Phone: +86-755-2850 7521
Fax: +86-755-2850 0927
E-mail Address: [log in to unmask]
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