Abstract:
A photoresist material having a polymer that turns soluble to a base solution in response to reaction with acid. The material includes a photo-acid generator (PAG) that decomposes to form acid in response to radiation energy and a quencher capable of neutralizing acid and having a reduced mobility. The photoresist material can thereby prevent water mark defects from immersion lithography.
Abstract:
A resist material and methods using the resist material are disclosed herein. An exemplary method includes forming a resist layer over a substrate, wherein the resist layer includes a polymer, a photoacid generator, an electron acceptor, and a photodegradable base; performing an exposure process that exposes portions of the resist layer with radiation, wherein the photodegradable base is depleted in the exposed portions of the resist layer during the exposure process; and performing an developing process on the resist layer.
Abstract:
Immersion lithography system and method using a sealed wafer bottom are described. One embodiment is an immersion lithography apparatus comprising a lens assembly comprising an imaging lens and a wafer stage for retaining a wafer beneath the lens assembly, the wafer stage comprising a seal ring disposed on a seal ring frame along a top edge of the wafer retained on the wafer stage, the seal ring for sealing a gap between an edge of the wafer and the wafer stage. The embodiment further includes a fluid tank for retaining immersion fluid, the fluid tank situated with respect to the wafer stage for enabling full immersion of the wafer retained on the wafer stage in the immersion fluid and a cover disposed over at least a portion of the fluid tank for providing a temperature-controlled, fluid-rich environment within the fluid tank.
Abstract:
The present disclosure provides a method for making a semiconductor device. The method includes forming a sacrificial layer on a substrate; forming a patterned resist layer on the sacrificial layer; performing an ion implantation to the substrate; applying a first wet etch solution to remove the patterned photoresist layer; and applying a second wet etch solution to remove the sacrificial layer.
Abstract:
Immersion lithography system and method using a sealed wafer bottom are described. One embodiment is an immersion lithography apparatus including a lens assembly comprising an imaging lens and a wafer stage for retaining a wafer beneath the lens assembly and comprising a seal ring for sealing a gap between a bottom edge of a wafer retained on the wafer stage and the wafer stage. The apparatus further includes a fluid tank for retaining immersion fluid, the fluid tank situated with respect to the wafer stage for enabling full immersion of the wafer retained on the wafer stage in the immersion fluid; a cover disposed over at least a portion of the fluid tank for providing a temperature-controlled, fluid-rich environment within the fluid tank; and at least one directional flow control fluid inlet surrounding the imaging lens for directing immersion fluid toward an edge of the wafer retained on the wafer stage closest to the imaging lens.
Abstract:
Various lithography methods are disclosed herein. In an example, a method includes forming a resist layer over a substrate; forming a coating material layer that includes one of an acid and a chelate compound over the resist layer; and exposing the resist layer and the coating material layer to radiation, wherein during the exposing, the one of the acid and the chelate compound in the coating material layer substantially neutralizes any quencher that diffuses into the coating material layer from the resist layer.
Abstract:
A resist material utilized in photolithography patterning includes a first material, and a second material dispersed in the first material. The second material is capable of diffusing to a top surface of the resist material, and has an etch rate different from that of the first material.
Abstract:
A vaporizing spray deposition device for forming a thin film includes a processing chamber, a fluid line, and a spray head coupled to the fluid line proximate the processing chamber. The fluid line is configured to transfer a polymer fluid and solvent mixture to the spray head. The spray head is configured to receive the polymer fluid and solvent mixture and to atomize the polymer fluid and solvent mixture to emit it in a substantially vaporized form to be deposited on a surface and thereby forming a thin film of the polymer on the surface after evaporation of the solvent. In an embodiment, the vaporizing spray deposition device may include a heating device to perform a hard bake process on the polymer. In an embodiment, the vaporizing spray deposition device may be configured to provide a post deposition solvent spray trim process to the thin film polymer.
Abstract:
The present invention includes a lithography method comprising forming a first patterned insist layer including at least one opening therein over a substrate. A water-soluble polymer layer is formed over the first patterned resist layer and the substrate, whereby a reaction occurs at the interface of the first patterned resist layer and the water-soluble polymer layer. The non-reacted water-soluble polymer layer is removed. Thereafter, a second patterned resist layer is formed over the substrate, wherein at least one portion of the second patterned resist layer is disposed within the at least one opening of the first patterned resist layer or abuts at least one portion of the first patterned resist layer. The substrate is thereafter etched using the first and second patterned resist layers as a mask.
Abstract:
A coating material disposed overlying a photo sensitive layer during an immersion lithography process includes a polymer that is substantially insoluble to an immersion fluid and an acid capable of neutralizing a base quencher from the photo sensitive layer.