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April 2, 2007

Lead-free connector rework

I'm looking for process guidelines to remove a lead-free Mictor connector on a lead-free PCBA. The PCB thickness is 0.100 mils and Mictor ground pins are not protruded on bottom side.

The challenge is having the sm pads and pth pins at the same time in reflow without overheating the PCB.

All recommendations are welcome.

Yves Desrochers

Experts Comments

There is only one method I can identify for this type of application, the pcb will require substantial bottom side heat, combined with a convection top heater with mechanical lifting capacity.

The APR-5000-XLS machine has the ability to concentrate the bottom heating to a small location on the board and the tweezer convection nozzles will grab and lift this part from the board with programmable accuracy.

Edward Zamborsky
Regional Sales Manager
OK International Inc.
Mr. Zamborsky serves as one of OK's technology advisers to the Product Development group. Ed has authored articles and papers on topics such as; Low Volume SMT Assembly, Solder Fume Extraction, SMT Rework, BGA Rework, Lead Free Hand Soldering, Lead Free Visual Inspection and Lead Free Array Rework.

Flextronics already has some sites equipped with a Laser Rework system from ViTechnology.

This is a contact less system with extremely good heat transfer which may be able to be used for this application. If you email me I can give you some contacts within Flextronics sites in Europe and Asia.

Mark Norris
Vice President Asia
Nordson Advanced Technologies
Responsible for Nordson Advanced Technology Electronic Systems throughout Asia including China, Taiwan, Korea, Japan & SE Asia. Nordson Advanced Electronic Systems includes the world leading technology companies Asymtek Dispensing, Dage X-Ray, Dage Bond Test, March Plasma, Matrix AXI & Yestech AOI.
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