Monday, July 18, 2011

US Patent 7976950 - Graphene transparent electrode

There are already a few patents around for graphene-based transparent electrodes (e.g. US 7449133)which may be a potential successor to ITO used in manufacture of flat panel electronic displays. This patent teaches one variation from Hitachi with high light transmission. Claim 1 reads:

1. A transparent conductive film, comprising graphene platelets overlapping one another to form a multilayer structure, wherein:

an average size of the graphene platelets is 50 nm or more;

each of the graphene platelets consists of single atomic layer or a plurality of atomic layers less than 9;

a total number of the atomic layers in the multilayer structure is 9 or less; and

the transparent conductive film has an electrical resistivity of 1.0×10−6 Ωm or less and a light transmission at a wavelength of 550 nm of 80% or more.