John

Othere suggestion.
1)It is suggest to change another vendor's material for experiment and 
comparison.
2)kick out vendor from AVL if there is no any solution and improvement on 
it.


Regards.
FP Deng
Operations--Manufacturing Engineering 
DongGuan Celestica Electronics Ltd.
Tel:0769-83394581 Ext.260
C/P:13686119846
Email:[log in to unmask]

----- Forwarded by FP Deng/DG/Asia/Celestica on 2007-09-18 15:34 -----

FP Deng/DG/Asia/Celestica
2007-09-18 14:00

To
"John Ling (Jiazhao Ling)" <[log in to unmask]>, [log in to unmask]
cc

Subject
Re: [TGA] Chip LED Reflow condition





Hi, John

I think it belongs to material issues. Actually,there are many 
unpredictable issues on any new process study, 
So component spec.study for stencil, toolings and process flow & settings 
become most important. 
According to what you said that it seems the component is not able to 
sustain high temperature. even though it was under 230~250 degree.
It is just my opinions for yr reference.


Regards.
FP Deng
Operations--Manufacturing Engineering 
DongGuang Celestica Electronics Ltd.
Tel:0769-83394581 Ext.260
C/P:13686119846
Email:[log in to unmask]






"John Ling (Jiazhao Ling)" <[log in to unmask]> 
Sent by: TGAsia <[log in to unmask]>
2007-09-18 12:07
Please respond to
"John Ling (Jiazhao Ling)" <[log in to unmask]>


To
[log in to unmask]
cc

Subject
[TGA] Chip LED Reflow condition






Hello, Haley:
    The bonding wire broken near bonding point. Befroe introducing RoHS, 
we don't have problemon chip LED reflow. TRhe failed LED can light, when 
mnual solder it agian. We still have PTH LED with 2% reject rate on wave 
sodlering which we don't have this problem before. 
    Our supplier have no idea to improve it?
    Thanks!
    John Ling
    Loud China 
 
----- Original Message ----- 
From: Haley Deng 
To: [log in to unmask] 
Sent: Tuesday, September 18, 2007 11:29 AM
Subject: Re: [TGA] Chip LED Reflow condition

Dear John,
 
What about failure model, ATE test or crack?
 
Haley
 

From: John Ling (Jiazhao Ling) [mailto:[log in to unmask]] 
Sent: Tuesday, September 18, 2007 11:19 AM
To: Asia Committe Task Group Forum; Haley Deng
Subject: Chip LED Reflow condition
 
Hello, Haley:
   Our Chip LED has 10% failure after RoHS reflow. DO you Have any idea to 
control it?
 
    Thanks!
    John Ling
    Loud China 
 

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