Formation of LDD structures and GOLD structures in a semiconductor device
is conventionally performed in a self aligning manner with gate
electrodes as masks, but there are many cases in which the gate
electrodes have two layer structures, and film formation processes and
etching processes become complex. Further, in order to perform formation
of LDD structures and GOLD structures only by processes such as dry
etching, the transistor structures all have the same structure, and it is
difficult to form LDD structures, GOLD structures, and single drain
structures separately for different circuits. By applying a
photolithography process for forming gate electrodes to photomasks or
reticles, in which supplemental patterns having a function of reducing
the intensity of light and composed of diffraction grating patterns or
translucent films, are established, GOLD structure, LDD structure, and
single drain structure transistors can be easily manufactured for
different circuits through dry etching and ion injection process steps.