摘要:
A method of forming a device is disclosed. The method includes providing a substrate prepared with a dielectric layer having first and second regions. The first region comprises wide features and the second region comprises narrow features. A depth delta exists between bottoms of the wide and narrow features. A non-conformal layer is formed on the substrate and it lines the wide and narrow trenches in the first and second regions. The non-conformal layer is removed. Removing the non-conformal layer reduces the depth delta between the bottoms of the wide and narrow features in the first and second region.
摘要:
Antireflective residues during pattern transfer and consequential short circuiting are eliminated by employing an underlying sacrificial layer to ensure complete removal of the antireflective layer. Embodiments include forming a hard mask layer over a conductive layer, e.g., a silicon substrate, forming the sacrificial layer over the hard mask layer, forming an optical dispersive layer over the sacrificial layer, forming a silicon anti-reflective coating layer over the optical dispersive layer, forming a photoresist layer over the silicon anti-reflective coating layer, where the photoresist layer defines a pattern, etching to transfer the pattern to the hard mask layer, and stripping at least the optical dispersive layer and the sacrificial layer.