摘要:
Embodiments of the present invention provide a method of forming a semiconductor structure. The method includes forming a set of shapes on top of a substrate; applying a layer of copolymer covering the substrate; causing the copolymer to form a plurality of cylindrical blocks both inside and outside the shapes; forming a pattern of contact holes from the plurality of cylindrical blocks; and transferring the pattern of contact holes to the substrate to form the semiconductor structure. In one embodiment, the shapes are rings and forming the set of shapes includes forming a set of rings that are equally and squarely spaced. In another embodiment, causing the copolymer to form the plurality of cylindrical blocks includes forming only one cylindrical block inside each of the rings and only one cylindrical block outside every four (4) squarely neighboring rings.
摘要:
A method to mitigate resist pattern critical dimension (CD) variation in a double-exposure process generally includes forming a photoresist layer over a substrate; exposing the photoresist layer to a first radiation; developing the photoresist layer to form a first pattern in the photoresist layer; forming a topcoat layer over the photoresist layer; exposing the topcoat layer and the photoresist layer to a second radiation; removing the topcoat layer; and developing the photoresist layer to form a second pattern in the photoresist layer.
摘要:
A method of forming different structures of a semiconductor device using a single mask and a hybrid photoresist. The method includes: applying a first photoresist layer on a semiconductor substrate; patterning the first photoresist layer using a photomask to form a first patterned photoresist layer; using the first patterned photoresist layer to form a first structure of a semiconductor device; removing the first patterned photoresist layer; applying a second photoresist layer on the semiconductor substrate; patterning the second photoresist layer using the photomask to form a second patterned photoresist layer; using the second patterned photoresist layer to form a second structure of a semiconductor device; removing the second patterned photoresist layer; and wherein either the first or the second photoresist layer is a hybrid photoresist layer comprising a hybrid photoresist.
摘要:
A composition is provided. The composition includes a polymer and a photosensitive acid generator capable of generating a first amount of acid upon exposure to a first dose of radiation and a second amount of acid upon exposure to a second dose of radiation. The second amount of acid is greater than the first amount of acid. The second dose is greater than the first dose. The composition includes a photosensitive base generator capable of generating a first amount of base upon exposure to the first dose and a second amount of base upon exposure to the second dose, where the first amount of base is greater than the first amount of acid and the second amount of base is less than the second amount of acid. The photosensitive base generator may include benzoin carbamates, O-carbamoylhydroxylamines, O-carbamoyloximes, aromatic sulfonamides, α-lactones, N-(2-Arylethenyl)amides, azides, amides, oximines, quaternary ammonium salts, or amineimides.
摘要:
A negative developable bottom antireflective coating (NDBARC) material includes a polymer containing an aliphatic alcohol moiety, an aromatic moiety, and a carboxylic acid moiety. The NDBARC composition is insoluble in a typical resist solvent such as propylene glycol methyl ether acetate (PGMEA) after coating and baking. The NDBARC material also includes a photoacid generator, and optionally a crosslinking compound. In the NDBARC material, the carboxylic acid provides the developer solubility, while the alcohol alone, the carboxylic acid alone, or their combination provides the PGMEA resistance. The NDBARC material has resistance to the resist solvent, and thus, intermixing does not occur between NDBARC and resist during resist coating over NDBARC. After exposure and bake, the lithographically exposed portions of both the negative photoresist and the NDBARC layer become insoluble in developer due to the chemically amplified crosslinking of the polymers in negative resist and NDBARC layer in the lithographically exposed portions.
摘要:
The present invention relates to a developable bottom antireflective coating (BARC) composition and a pattern forming method using the BARC composition. The BARC composition includes a first polymer having a first carboxylic acid moiety, a hydroxy-containing alicyclic moiety, and a first chromophore moiety; a second polymer having a second carboxylic acid moiety, a hydroxy-containing acyclic moiety, and a second chromophore moiety; a crosslinking agent; and a radiation sensitive acid generator. The first and second chromophore moieties each absorb light at a wavelength from 100 nm to 400 nm. In the patterning forming method, a photoresist layer is formed over a BARC layer of the BARC composition. After exposure, unexposed regions of the photoresist layer and the BARC layer are selectively removed by a developer to form a patterned structure in the photoresist layer. The BARC composition and the pattern forming method are especially useful for implanting levels.
摘要:
A method that forms a film of photoresist composition on a substrate and exposes a first and second region of the film to radiation through a first and second mask having a first and second image pattern, respectively. The photoresist composition includes a polymer including labile group(s), base soluble group(s), a photosensitive acid generator, and a photosensitive base generator. The photosensitive acid generator generates first and second amounts of acid upon exposure to first and second doses of radiation, respectively. The second amount of acid exceeds the first amount of acid. The second dose of radiation exceeds the first dose of radiation. The photosensitive base generator generates a first and second amount of base upon exposure to the first and second dose of radiation, respectively. The first amount of base exceeds the first amount of acid. The second amount of acid exceeds the second amount of base.
摘要:
A method for reducing a photoresist critical dimension, the method comprising depositing a photoresist film on a substrate, wherein the photoresist film includes a thermal base generator; patterning the photoresist film to form a first patterned film possessing a first critical dimension; depositing a crosslinkable film over the first patterned film; heat-activating the first patterned film, either before or after depositing the crosslinkable film, to release a base in the first patterned film and cause crosslinking in the crosslinkable film in contact with the first patterned film; and developing the crosslinkable film to remove non-crosslinked soluble portions therein to form a second patterned film possessing a reduced critical dimension compared to the first critical dimension.
摘要:
A photoresist composition and methods using the photoresist composition in multiple exposure/multiple layer processes. The photoresist composition includes a polymer comprising repeat units having a hydroxyl moiety; a photoacid generator; and a solvent. The polymer when formed on a substrate is substantially insoluble to the solvent after heating to a temperature of about 150° C. or greater. One method includes forming a first photoresist layer on a substrate, patternwise exposing the first photoresist layer, forming a second non photoresist layer on the substrate and patterned first photoresist layer. Another method includes forming a first photoresist layer on a substrate, patternwise exposing the first photoresist layer, forming a second photoresist layer on the substrate and patterned first photoresist layer and patternwise exposing the second photoresist layer.
摘要:
A photoresist binder composition comprising a homogeneous blend of (i) a hydroxystyrene copolymer comprising a first monomer that is optionally substituted hydroxystyrene and a second monomer containing an acid labile group, preferably pendant to the polymer backbone, and (ii) and a phenolic polymer, that is optionally partially or wholly protected, such as polyhydroxystyrene, poly(hydroxystyrene-co-styrene), poly(hydroxystyrene-co-styrene-co-t-butyl acrylate), novolac, and the like. Also provided is a lithographic resist composition comprising the homogeneous blend of the photoresist binder composition, and a radiation-sensitive acid generator which generates an acid upon exposure to radiation, and a process for using the resist composition to generate resist images on a substrate, such as in the manufacture of integrated circuits or the like.