QFN's have a very low standoff height.
How is cleaning ensured with QFN's with 2 rows of pads and cleaning
required?

Most of my experience has been SAC305 no clean.
They passed automotive, non safety, requirements.

Did have to clean some water and rosin based fluxes on these parts in the
hi rel domain.
Was not comfortable with the measurements that verified cleanliness.


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