This is a process known as nano-imprint lithography.
Dr Faiz Rahman, who is leading the project, said: "As yet, LEDs have not been introduced as the standard lighting in homes because the process of making the holes is very time consuming and expensive.
"However, we believe we have found a way of imprinting the holes into billions of LEDs at a far greater speed, but at a much lower cost."Link:
New efficient bulb sees the light