The problem with vacuum deposition is that only the tops of objects get coated, not their bottoms.

ECONOMIST: MONITOR

The technology's versatility across all display sizes is made possible through cost-effective ink jet printing that requires no vacuum deposition.

ENGADGET: NanoPhotonica develops S-QLED, OLED to develop inferiority complex soon

But it is possible to lay down a thin layer of silicon on a flexible plastic sheet, through a process called vacuum deposition.

ECONOMIST: Just press print