Slater & Matsil, L.L.P.
Unlocking layer and method
A system and method for anti-reflective layers is provided. In an embodiment the anti-reflective layer comprises a polymer resin which has repeating units within it. At least one of the repeating units comprises a locked unit which has a cyclic structure and a lock within the unit. After the anti-reflective layer has been applied and baked, irregularities such as voids and step heights differences that have occurred may be handled by unlocking the lock within the locked unit. This unlocking breaks the cyclic structure, allowing the polymer to take up more volume and causing the anti-reflective layer to self-expand, filling the voids and reducing the step-height. The unlocking may be performed by exposure or thermal treatments.
Taiwan Semiconductor Manufacturing Company, Ltd.
H H G C H H H H
H01L H01L G03F C09D H01L H01L H01L H01L
inventional inventional inventional inventional inventional inventional inventional inventional
Chen-Yu Ching-Yu
Liu Chang