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BGA rework



BGA rework | 22 April, 2004

What is the best rework equipment on the market for BGA's and the pro and cons of others?

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Nick Prince


BGA rework | 23 April, 2004

Everyones opinions will differ as to which is the best. Most people will recommend the systems they bought, fiar enough I susppose.

Here is the best value system on the market, you will need to shop around.

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BGA rework | 26 April, 2004


We currently use Metcals for our regular work and I was looking at the ERSA system for the BGA rework.

From what I have seen it seems simple to use, and since it uses IR you don�t need all the attachments for different size BGA�s. You just use the restrictor plates to adjust the size and shape you need heated. You can also get it with the laser temperature sensor so you can tell how hot the component you are working with actually gets and not just the temp of the air around it. Plus you can get it with the optical system to see the alignment and watch the double drop in soldering while heating the BGA.

The only thing that concerns me is I have heard both good and bad on using IR. It melts soft plastic components, like connectors. But you can direct the IR to avoid hitting those areas.

My concern with going with a hot air system is how much airflow would you need to heat the center under a large BGA. Would you be blowing away other small components nearby?

I should probably start a new thread named Hot Air vs. IR but it pertains to what I am looking for here.

Thanks again,

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BGA rework | 26 April, 2004

Any concerns on the IR in melting connectors etc. simply cover the part with aluminum foil. That will prevent any heat from attacking the component. The Ersa unit is in my mind the best bang for the buck.

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BGA rework | 27 April, 2004


While agreeing with your method here, I also would like to ask a question since we're right on that subject.

Have you ever experienced problems with IR heating while working with a Heat-Slug BGA, or a Viper BGA where the whole top is covered with a copper heatslug, or a QFP with a metal heatslug?

Since the aluminum foil will prevent the plastic parts from melting, I am wondering if the heatslugs will act similarly?


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BGA rework | 27 April, 2004

Well I would think that the heat slug would work to a point. Obviously made to dissipate heat from the component. That said it wouldn't hurt to cover that also with aluminum foil. Your not wrapping a present, your simply tenting the component. IR will not penetrate the aluminum. Hope that helps. Steve

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BGA rework | 28 April, 2004

Hi Daniel,

I would suggest you check out

FocalSpot offers an advanced rework station from Japan, the RD-500 Series, which is unique to the industry and tailored for lead free rework and challenging BGA applications due its thermal control & efficiency. The RD-500 Series offers both top and bottom localized Hot gas with a full area bottom IR heater.

Best Regards.

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BGA rework | 29 April, 2004

Hi Steven,

Let me step back a bit.

Have you ever removed and/or placed a QFP/BGA with a heatslug using IR before?


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BGA rework | 6 May, 2004

SUMMIT 750. My yield is 75%-98%. And they all depend on the pad design, stencil, paste, operator, thermal profile, etc. I have 98% yield on some of our products with good pad design. Process is easy to control.


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Hi Steven


BGA rework | 8 August, 2005

My suggest is using Ersa IR55A or IR650A.

If you looking for your quality, you need this system. I had try it many time, is better then hot air. and you can set the profile as you like, even Flat Peak on the Lead Free Rework.

James Khor

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