Why hall bar fabricated using photolithography and sputtering are not showing continuity with contact pads?

I am fabricating the Hall bar (5 micron width and 35 micron length) of Ta(3nm)Co(4nm)Pt(5nm) using photolithoghaphy and sputtering. This Hall bar is connected by contact pads of Ti(10nm)/Au(60nm)...

30 June 2024 1,946 3 View