Patent ID: 7794903

Claim:
A method of making a semiconductor device, the method comprising: providing a lithography mask, the lithography mask comprising a substantially opaque or light-absorbing material, a substantially transparent or light-reflecting material coupled to the substantially opaque or light-absorbing material, and a plurality of corner rounding test patterns formed on the substantially opaque or light-absorbing material or the substantially transparent or light-reflecting material, the plurality of corner rounding test patterns including at least two angle-containing patterns, wherein an amount of corner rounding of a lithography process may be determined by analyzing at least one of a plurality of corner rounding test features formed using the lithography mask on a layer of material of a semiconductor device relative to other of the plurality of corner rounding test features; providing a workpiece having a photosensitive material layer disposed thereon; irradiating the photosensitive material layer through the lithography mask; removing a portion of the photosensitive material layer to expose a top surface of a portion of the workpiece, the removed portion based on a pattern of the lithography mask; and using the remaining portion of the photosensitive material layer as a mask, modifying the top surface of the exposed portion of the workpiece.