A plan is always tailored to the company's structure and needs. However, the guidelines are: 
* start with your components: 
  > Check for every component the availability of RoSH compliant components (lead is only one of the banned components). 
  > Don't forget to check for components that are declared as "lead free" that they can withstand the higher soldering temp - many manufacturers are changing the external coating without changing the internal structure. 245 deg C are absolutely the minimum, 260 deg C should be the target.
* As a CM, check the materials you are using and ensure that no banned material is being used.
* Specify your PCB laminates to withstand T288 and use finish that does not contain lead.
* Assemble a real PCB with components: if your BOM is costly use mock up packages, otherwise use real ones. Make some experiments to validate the process - use MOLE to measure the profile and cross section the board to validate the soldering.
* After having the full "green" bill of materials build the board according to the proven process and validate the electrical functionality - hopefully this should be a given.

Regards
Ofer Cohen
Manager
Quality Assurance, Reliability and Production Technologies

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ken Patel
Sent: Wednesday, June 30, 2004 20:02
To: [log in to unmask]
Subject: [TN] Leadfree transition plan


Guys,

I have been given a task of implementing Leadfree change over. We are OEM
and our CM to build assemblies for us. Part of my responsibility is to come
out with a clear plan for transition from Pb containing to leadfree
assemblies. Does anyone has created such plan and willing to share with me.
This plan of attack will help us in moving smoothly to leadfree with fewer
headaches. I know I have to work with not only CM but also with suppliers.



Any help will be highly appreciated.



Re,

Ken Patel


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