How many nanometers can be produced by the 28nm lithography machine is analyzed below.
In theory, the 28 nm lithography machine can produce 14 nm products by re-exposure, and 7 nm can be produced by two exposures. But theory to theory, reality to reality, due to the accuracy problem, the yield of multiple exposures is very low, low yield means that the price is high, the product is not competitive in the market, so in the re-exposure technology mature conditions to improve the yield, so that 28 nanometer lithography machine manufacturing yield is relatively high 14 nanometer chip is a good choice, then it is difficult to low.