Current crowding and misalignment effects as sources of error in contact resistivity measurements—Part II: Experimental results and computer simulation of self-aligned test structures

In this work we show that an accurate and straightforward extraction of the contact resistivity from contact resistance data can be achieved using properly designed self-aligned test patterns. In this way, the parasitic effects are minimized and the contact resistivity can be derived using simple one-dimensional models as confirmed by our computer simulation. Experimental results obtained in self-aligned structures are presented for Al/CoSi2/n⁺Si and Al-Si/n⁺Si contacts.