The fabrication and the chip layout of 69120 SINIS Josephson junction serie
s arrays for a programmable 10 V Josephson de voltage standard are presente
d. Under 70 GHz microwave irradiation, the current-voltage characteristic e
xhibits a non-hysteretic voltage step with a step width of 200 mu A. The ch
ip can be operated with the conventional SIS Josephson voltage standard sys
tems.