摘要:
Provided is an alignment mark having a plurality of sub-resolution elements. The sub-resolution elements each have a dimension that is less than a minimum resolution that can be detected by an alignment signal used in an alignment process. Also provided is a semiconductor wafer having first, second, and third patterns formed thereon. The first and second patterns extend in a first direction, and the third pattern extend in a second direction perpendicular to the first direction. The second pattern is separated from the first pattern by a first distance measured in the second direction. The third pattern is separated from the first pattern by a second distance measured in the first direction. The third pattern is separated from the second pattern by a third distance measured in the first direction. The first distance is approximately equal to the third distance. The second distance is less than twice the first distance.
摘要:
The present disclosure provides a photomask. The photomask includes a substrate. The photomask also includes a plurality of patterns disposed on the substrate. Each pattern is phase shifted from adjacent patterns by different amounts in different directions. The present disclosure also includes a method for performing a lithography process. The method includes forming a patternable layer over a wafer. The method also includes performing an exposure process to the patternable layer. The exposure process is performed at least in part through a phase shifted photomask. The phase shifted photomask contains a plurality of patterns that are each phase shifted from adjacent patterns by different amounts in different directions. The method includes patterning the patternable layer.
摘要:
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; and
摘要:
Immersion lithography system and method using direction-controlling fluid inlets are described. According to one embodiment of the present disclosure, an immersion lithography apparatus includes a lens assembly having an imaging lens disposed therein and a wafer stage configured to retain a wafer beneath the lens assembly. The apparatus also includes a plurality of direction-controlling fluid inlets disposed adjacent to the lens assembly, each direction-controlling fluid inlet in the plurality of direction-controlling fluid inlets being configured to direct a flow of fluid beneath the lens assembly and being independently controllable with respect to the other fluid inlets in the plurality of direction-controlling fluid inlets.
摘要:
Disclosed is an objective lens adapted for use in liquid immersion photolithography and a method for making such a lens. In one example, the objective lens has multiple lens elements, one of which includes a transparent substrate and a layer of protective coating (PC). The PC is formed proximate to the transparent substrate and is positioned between a liquid used during the liquid immersion photolithography and the transparent substrate to protect the transparent substrate from the liquid.
摘要:
The present disclosure provides a system and method for manufacturing a mask for semiconductor processing. In one example, the system includes at least one exposure unit configured to select a recipe for a later baking process in a post treatment unit, a buffer unit coupled to the exposure unit and configured to move the mask substrate from the exposure unit to the post treatment unit without exposing the mask substrate to the environment; and the post treatment unit coupled to the buffer unit and the exposure unit and configured to perform a baking process on the mask substrate using baking parameters associated with the recipe selected by the exposure unit.
摘要:
An apparatus for immersion lithography that includes an imaging lens which has a front surface, a fluid-containing wafer stage for supporting a wafer that has a top surface to be exposed positioned spaced-apart and juxtaposed to the front surface of the imaging lens, and a fluid that has a refractive index between about 1.0 and about 2.0 the fluid filling a gap formed in-between the front surface of the imaging lens and the top surface of the wafer. A method for immersion lithography can be carried out by flowing a fluid through a gap formed in-between the front surface of an imaging lens and a top surface of a wafer. The flow rate and temperature of the fluid can be controlled while particulate contaminants are filtered out by a filtering device.
摘要:
Various seal ring arrangements for an immersion lithography system are disclosed. With the seal ring arrangements, the immersion lithography system can provide better sealing effect for processing the wafers on a wafer chuck.
摘要:
A method and system for simultaneously processing multiple substrates through an imaging beam process is provided. The system includes a plurality of direct write substrate exposure modules configured to receive a writing instruction from a data processing unit. The system and method of the invention utilizes multiple exposure modules receiving writing instructions from a single common data processing unit.
摘要:
Immersion lithography apparatus and method using a shield module are provided. An immersion lithography apparatus including a lens module having an imaging lens, a substrate table positioned beneath the lens module and configured for holding a substrate for processing, a fluid module for providing an immersion fluid to a space between the lens module and the substrate on the substrate table, and a shield module for covering an edge of the substrate during processing.