The semiconductor read only memory according to this invention includes {HEAD ~ a plurality} of {TAIL ~ MOS transistors} formed on a substrate and silicon resistances of polycrystal or amorphous connected to the source region and the drain region of the MOS transistors 
The semiconductor read only memory according to this invention includes { HEAD ~ a plurality } of { TAIL ~ MOS transistors } formed on a substrate and silicon resistances of polycrystal or amorphous connected to the source region and the drain region of the MOS transistors
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