Surface Mount and Board Design Guidelines for QFN/MLF Packages

Answer:

Question: Where do I find PCB landpattern and assembly guidelines for QFN / MLF packages?  Is there an application note on this topic?

Answer:  The following application Note provides information on PCB landpattern and assembly guidelines for QFN / MLF package.

Also, the attached document from Amkor provides PCB guidelines for QFN / MLF packages.