Flexible graphene transistor via printing transfer

Graphene is an atomic layer material with the characteristics of high mobility, high mechanical strength and transparency etc. Graphene is also an excellent candidate material for flexible electronics applications. However, due to the temperature limit of typical flexible substrates and the typical difficulties associated with implementing small feature size lithography process on flexible substrates, it is very challenging to directly fabricate fine feature sized graphene transistors on flexible substrates. We proposed an approach to fabricating fine feature sized graphene transistors on rigid substrates and transfer the fully fabricated transistors to flexible substrates via transfer printing. We demonstrated the successful transfer of arrays of monolayer graphene transistors with minimum feature size of 500nm with high yield and the demonstrated approach can be easily scaled to wafer size.