Hyundai Electronics Industries Co. Ltd.

Hynix Semiconductor Inc.

Cha Won Koh

Jae Chang Jung

Geun Su Lee

Ki Ho Baik

Min Ho Jung

Jin Soo Kim

Keun Kyu Kong

Sung Eun Hong

Hyeong Soo Kim

Cheol Kyu Bok

Myoung Soo Kim

Ki Soo Shin

Hyung Gi Kim

Yoon Suk Hyun

The present invention provides a process for using an amine contamination-protecting top-coating composition. Preferably, the amine contamination-protecting top-coating composition of the present invention comprises an amine contamination-protecting compound. Useful amine contamination-protecting compounds include amine derivatives; amino acid derivatives; amide derivatives; urethane derivatives; urea derivatives; salts thereof; and mixtures thereof. The amine contamination-protecting top-coating composition of the present invention reduces or eliminates problems such as T-topping due to a post exposure delay effect and/or difficulties in forming a fine pattern below 100 nm due to acid diffusion associated with conventional lithography processes involving a photoresist polymer containing an alicyclic main chain using a light source, such as KrF (248 nm), ArF (193 nm), F(157 nm), E-beam, ion beam and extremely ultraviolet (EUV).

Process for forming a fine pattern using a top-coating composition for a photoresist and product formed by same

The present invention provides an over-coating composition comprising a basic compound for coating a photoresist composition to provide a vertical photoresist pattern.

Top-coating composition for photoresist and process for forming fine pattern using the same

Photoresist monomers, photoresist polymers prepared thereof, and photoresist compositions using the polymer are disclosed. More specifically, photoresist polymers comprising maleimide monomer represented by Formula 1, and a composition comprising the polymer thereof are disclosed. The photoresist composition has excellent etching resistance, heat resistance and adhesiveness, and can be developed in an aqueous tetramethylammonium hydroxide (TMAH) solution. As the composition has low light absorbance at 193 nm and 157 nm wavelength, and it is suitable for a process using ultraviolet light source such as VUV (157 nm)wherein, X, X, R, Rand Rare defined in the specification.

Maleimide-photoresist monomers containing halogen, polymers thereof and photoresist compositions comprising the same

Disclosed is a method of forming a fine pattern in a semiconductor device using a photolithography process, which comprises: coating a photoresist layer for an I-line and a positive type ArF photoresist layer on a semiconductor substrate that includes a conductive layer; performing exposure and a first baking process on the resultant substrate by using an etch-mask of a desired pattern to produce alcohol radicals (OH ) or carboxyl acid (COOH) in the positive type ArF photoresist layer, in which a silylation reaction can be produced; removing the etch-mask; performing a development process to the resultant structure to form a first photoresist pattern; performing exposure and a second baking process on the substrate that includes the first photoresist pattern; performing a silylation process to the substrate to which the second baking process has been performed, by using an HMDS to form a silicon oxide layer on the surface of the first photoresist pattern through reaction between the alcohol radicals (OH ) or the carboxyl acid (COOH) and the HMDS; performing a dry development process to the photoresist layer for the I-line by using the first photoresist pattern along with the silicon oxide layer as an etch-mask in order to form a second photoresist pattern; and etching the conductive layer by using the first and second photoresist patterns together with the silicon oxide layer as an etch-mask in order to form bit-lines.

Method for forming fine patterns in semiconductor device

A photoresist polymer for a top-surface imaging process by silylation (TIPS), and a photoresist composition comprising the same. The protecting group of the present photoresist polymer is selectively protected in an exposed region, and thus a hydroxyl group is generated. The hydroxyl group reacts with the silylation agent to cause a silylation process. Accordingly, when the photoresist film is dry-developed, the exposed region only remains to form a negative pattern. In addition, the present photoresist composition has excellent adhesiveness to a substrate, thus preventing a pattern collapse in forming a minute pattern. As a result, the present photoresist composition is suitable for a lithography process using light sources such as ArF (193 nm), VUV (157 nm) and EUV (13 nm).

Photoresist polymer for top-surface imaging process by silylation and photoresist composition containing the same

Over-coating composition for photoresist, and processes for forming photoresist patterns using the same

The present invention provides a method for reducing or eliminating a poor pattern formation on a photoresist film by contacting the photoresist film with an alkaline solution prior to its exposure to light. Methods of the present invention significantly reduce or prevent T-topping and top-loss.

Process for forming a photoresist pattern comprising alkaline treatment

A process for producing a photoresist pattern is disclosed. In particular, the disclosed process for forming a photoresist pattern reduces or prevents poor quality photoresist patterns formation, especially when a high light absorbing (i.e., low transmittance) photoresist resin is used. In one aspect, a photoresist film which has been exposed to light is treated with a gas phase basic compound to produce a substantially vertical photoresist pattern.

Process for forming photoresist pattern by using gas phase amine treatment

Photoresist composition for top-surface imaging processes by silylation

The present invention provides photoresist compositions for a Top-surface Imaging Process by Silylation (TIPS) and processes for using the same. The photoresist composition comprising a photoresist resin, a photoacid generator, an organic compound, and an amphoteric compound. The amphoteric compound prevents or reduces the amount of acid diffusion into the unexposed area and improves the contrast between the exposed and the unexposed areas. This reduction or prevention of acid diffusion into the unexposed areas reduces line edge roughness (LER).

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Seoul, South Korea

Cha Won Koh