Techneter's


     I am presently writing the procedures for pwb cleanliness requirements
     that our board suppliers must meet inorder to deliver PWB's to us that
     will be used in a No Clean process.  The questions I have are:

     What is the specification (Bellcore/IPC) that is being required, that
     is industry recognized, on the board suppliers that would guarantee a
     cleanliness level?

     Is ROSE testing an acceptable test for the board suppliers to perform
     to guarantee this cleanliness level?

     Is MODIFIED-ROSE test an acceptable test for board suppliers to
     perform to quarantee this cleanliness level? (Recognize that the
     MOD-ROSE test is not an approved industry standard todate)

     Once you have the PWB suppliers qualified, what is the requirements on
     your incoming inspection that would be evidience that the pwb
     suppliers are meeting the cleanliness requirements? Is it a C of C?

     What is the method used to monitor the cleanliness level as a
     measuring stick? Is Ion Chromatograph the measuring stick?  How often
     is this measureable performed?

     I would appreciate any guidance you Techneter's can give me!

     Thanks

     Donn Steffen
     VDO-QE

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