Patent ID: 8703386

Claim:
A photoresist composition, comprising: water; about 0.1 wt % to about 30 wt % hydrogen peroxide; and about 1 wt % to about 30 wt % of a peroxo complex having a structure according to formula (1): [C′] k [M′ w (O 2 ) x (L′) y O u ] (1), wherein w is 1 or 2, x is an integer of 1 to 4, y is an integer of 1 to 4, u is 0 or 1, M′ w (O 2 ) x (L′) y O u has a charge of 0 to −3, C′ is ammonium (NH 4 + ), k is an integer of 0 to 3, M′ is a metal ion selected from the group consisting of Tantalum (V), Niobium (V), Titanium (IV), and combinations thereof, and L′ is an oxidatively stable organic carboxylate ligand; wherein wt % (weight percent) is based on total weight of the photoresist composition, and the photoresist composition is suitable for forming a photoresist layer in a process for e-beam lithography, x-ray lithography, and/or lithography utilizing an ultraviolet radiation source having a wavelength in the range of 400 nm to 10 nm, wherein the process includes imagewise exposing the photoresist layer to produce an exposed photoresist layer comprising i) exposed photoresist consisting essentially of exposed peroxo complex and ii) non-exposed photoresist consisting essentially of non-exposed peroxo complex, and removing the non-exposed photoresist using water or aqueous base developer to form a patterned photoresist layer comprising the exposed photoresist.