Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


BGA Placement on Flex

James Springer; Advanced Technology Manager

#23081

BGA Placement on Flex | 20 January, 2003

Has anyone ever placed and reflowed a 1.27mm PBGA to 6 mil poly flex bonded to aluminum? If so what is the life expectancy of the solder joints?

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

MA/NY DDave

#23086

BGA Placement on Flex | 21 January, 2003

Hi

From what you write no one here should have an answer since too little data is supplied.

You might need to go to an FEA modelling shop to model the stresses and observe fatique life, or find a group to discuss your process and your application parameters.

This technology is used with Flex (Polyimide) by Dupont, Rogers, etc and can have very long life depending on the application and the design.

YiE, DDave

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

#23187

BGA Placement on Flex | 28 January, 2003

Hi James, It's been done and tested and at my previous job.The solder joints life expectancy is the same as for PBGA's attached to rigid substrates. If you want more details and process specific details send me an e-mail at the above address. Good luck . Rob

reply »

MA/NY DDave

#23222

BGA Placement on Flex | 1 February, 2003

Hi

Again I would rather you have someone analyze this rather than using another person's data from potentially a completely different type of application.

The fact that he said the reliability was the same as rigid kind of bothers me. Usually on flex or polyimide the reliability should be better unless the design contrains things.

YiE, DDave

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

ii-feed SMD Intelligent Feeder

PCB Soldering Tools