These grains were about half a micron in size , far bigger than previously thought .
Ash particles are normally in the 50-100 micron ( 0.05 to 0.1 millimetre ) range .
That problem was due largely to the fact that the coating was only a fraction of a micron ( millionth of a metre ) thick .
And it makes predictions ; at micron scales the attraction between two masses will no longer depend on the square of the distance between them in the way that physicists since newton have required it to .
Taiwan 's government is preparing to take another liberalisation step by allowing more advanced 0.18 micron technology to be used by taiwanese companies in china in a few weeks time , officials at the ministry of economic affairs said .