SEMICONDUCTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To improve operation characteristics and reliability of a semiconductor device by forming structures of transistors arranged in various circuits to be appropriate for functions of the circuits; and achieve reduction in manufacturing cost and improvement in yield by achieving low power consumption and decreasing the number of processes.SOLUTION: A semiconductor device comprises: a transistor having an LDD (Lightly Doped Drain) region; and a gate electrode which has a tapered part and provided for forming the LDD region, in which an ionized N or P-type impurity element which is accelerated by electric fields to pass the gate electrode and a gate insulation film and added to a semiconductor layer.