Dear  Patricia Lui
                              You try hot air gun to remove components of 4 legs.
 
Best regards
Tom Zhang (张涛)
Customer Service Department
FIC (Suzhou) Inc.
Tel: +86 512 62581988 Ext:5629
Fax:+86 512 62581973
Email:[log in to unmask]
 

________________________________

寄件者: TGAsia [mailto:[log in to unmask]] 代理 Patricia Lui
寄件日期: 2011年3月17日 12:32
收件者: [log in to unmask]
主旨: Re: [TGAsia] 回覆: [TGAsia] leadfree hand s oldering t emperature


Thanks Tom,
 
I have a common complain of pads lift especially when the rework guy have to remove components with 4 legs. I have examined how the rework guy do to remove the components. He have used the tip of the soldering iron to rub on all the 4 solder joints until all the solder of the 4 legs melt then he pull out the component. I believe by metling the 4 legs together take a longer time which have caused the pads to be over heated and the pads lift up. Can you advice me what is the proper way we should do to remove a 4 leg component so as not to over heat the pads. Hope to have your advise.
 
Thanks & Best Regards
Patricia Lui
Xuan Technologies
 


--- On Wed, 16/3/11, Tom Zhang <[log in to unmask]> wrote:



	From: Tom Zhang <[log in to unmask]>
	Subject: [TGAsia] 回覆: [TGAsia] leadfree hand soldering t emperature
	To: [log in to unmask]
	Date: Wednesday, 16 March, 2011, 8:49 AM
	
	
	Temperature is too low  I advise temperature setted  380+(-)10 degC.
	
	 
	Best regards
	Tom Zhang (张涛)
	Customer Service Department
	FIC (Suzhou) Inc.
	Tel: +86 512 62581988 Ext:5629
	Fax:+86 512 62581973
	Email:[log in to unmask]
	 

________________________________

	寄件者: TGAsia [mailto:[log in to unmask]] 代理 Patricia Lui
	寄件日期: 2011年3月15日 23:17
	收件者: [log in to unmask]
	主旨: [TGAsia] leadfree hand soldering temperature
	
	
Dear Sir,
 
I have a customer who often complains boards supplied by us have pads lift issue when they do hand soldering rework. This customer is using hand soldering with temperature set at 320-349 degC for leadfree soldering rework and the boards supplied by us are with Tg130-140 degC only. We hope to have your expertise advice what is the common leadfree hand soldering temperature and if need to withstand 320-349degC hand soldering temperature, what Tg material should be used. 
 
Hope to receive your favourable advise. 
 
Thanks & Best Regards
Patricia Lui
Xuan Technologies


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