Thin quad flat package with no leads (QFN) fabrication methods

A method of packaging semiconductor devices comprising:

• attaching a first side of a wafer to a first adhesive surface;
• adding a layer of metal to a second side of the wafer, the layer of metal forming a metalized surface of the wafer;
• sawing through a plurality of saw streets of the wafer, and in accordance therewith, establishing individual semiconductor devices, each individual semiconductor device having a metalized surface corresponding to a portion of the metalized surface of the wafer;
• re-taping the individual semiconductor devices after sawing through a plurality of saw streets, the re-taping includes,
• attaching the metalized surface of the wafer to a second adhesive surface after the sawing through the plurality of saw streets, and
• removing the first adhesive surface from the first side of the wafer,
• attaching the metalized surface of each of the individual semiconductor devices to a third adhesive surface, and in accordance therewith, making the metalized surface unexposed, wherein the attaching the metalized surface of each of the individual semiconductor devices includes picking the individual semiconductor devices from the second adhesive surface;
• molding an exposed area above the third adhesive surface, forming a solid expanse of material;
• and
• sawing the solid expanse of material resulting in a plurality of packaged semiconductor devices.