in the line associated with the write driver 34a correspondingly a sense amplifier 36b provides the same function for and connection to the line associated with the write driver 34b similarly sense amplifier 36n provides the same function for the line associated with the write driver 34n in writing a 34 1 34 or a 34 0 34 into the write once read only semiconductor memory array of fig1 it is necessary to first establish whether writing a 34 1 34 means that you want to have a conducting state for the metal fuse contact a of fig7 or the metal fuse contact b of fig8 or is a 34 1 34 a nonconducting state for each of those metal fuse contacts either a 34 1 34 or a 34 0 34 can be the designation as desired as long as consistency in the use of the selected designation is maintained for the write once read only semiconductor memory array or system of fig1 each cross link electrical conductor connection or slanted line between the conductor line connected to each word driver i e word driver 32a and the conductor line connected to the corresponding write driver i e write driver 34a as shown in fig1 is considered to contain a resistor 38 to provide an indication that there is at least some electrical resistance associated with the fuse type device depicted in fig7 or in fig8 thus when any device of fig7 or fig8 is in an open non conducting state where as depicted in fig7 or fig8 the a silicon semiconductor material 22 is in an insulating or non conducting state then the fuse type device of fig7 or fig8 which is used as.