摘要:
A pattern forming method includes forming a first photoresist on an underlying region, forming a second photoresist on the first photoresist, the second photoresist having an exposure sensitivity which is different from an exposure sensitivity of the first photoresist, radiating exposure light on the first and second photoresists via a photomask including a first transmissive region and a second transmissive region which cause a phase difference of 180° between transmissive light components passing therethrough, the first transmissive region and the second transmissive region being provided in a manner to neighbor in an irradiation region, and developing the first and second photoresists which have been irradiated with the exposure light, thereby forming a structure includes a first region where the underlying region is exposed, a second region where the first photoresist is exposed and a third region where the first photoresist and the second photoresist are left.
摘要:
A cephem derivative represented by the following formula: ##STR1## wherein R.sub.1 means a fluorine-substituted lower alkyl and A.sub.1 denotes a cyclic or acyclic ammonio group, or a non-toxic salt thereof, is prepared by reacting a compound represented by the following formula: ##STR2## wherein A.sub.1 has the same meaning as defined above, with another compound represented by the following formula: ##STR3## wherein R.sub.1 has the same meaning as defined above, and if necessary, removing the protecting groups.
摘要:
According to one embodiment, a semiconductor device includes a plurality of wires arranged in parallel at a predetermined pitch, a plurality at first contacts that are each connected to an odd-numbered wire among the wires and are arranged in parallel in an orthogonal direction with respect to a wiring direction of the wires, and a plurality of second contacts that are each connected to an even-numbered wire among the wires and are arranged in parallel in an orthogonal direction with respect to the wiring direction of the wires in such a way as to be offset from the first contacts in the wiring direction of the wires, in which the first contacts are offset from the second contacts by a pitch of the wires in an orthogonal direction with respect to the wiring direction of the wires.
摘要:
A semiconductor device manufacturing method includes applying illumination light to a photomask, and projecting diffracted light components from the photomask via a projection optical system to form a photoresist pattern on a substrate. The photomask includes a plurality of opening patterns which are arranged on each of a plurality of parallel lines at regular second intervals in a second direction and which have regular first intervals in a first direction perpendicular to the second direction. The plurality of opening patterns arranged on the adjacent ones of the plurality of parallel lines are displaced from each other half the second interval in the second direction. Moreover, the dimensions of the plurality of opening patterns and the complex amplitude transmittance of nontransparent region in the photomask are set so that three of the diffracted light components passing through the pupil of the projection optical system have equal amplitude.
摘要:
A semiconductor memory device includes a semiconductor substrate on which memory cells are formed. Interconnects are arranged along a first direction above the semiconductor substrate, and have regular intervals along a second direction perpendicular to the first direction. Interconnect contacts connect the interconnects and the semiconductor substrate, are arranged on three or more rows. The center of each of two of the interconnect contacts which are connected to the interconnects adjacent in the second direction deviate from each other along the first direction.
摘要:
A 3-propenylcephem derivative of the following formula: ##STR1## wherein R.sub.1 represents a fluoro-substituted lower alkyl group or a cyano-substituted lower alkyl group, and A represents a cyclic or an acylic ammonio group, or a pharmaceutically acceptable salt thereof, exhibiting excellent anti-bacterial activities against both Gram-positive bacteria and Gram-negative bacteria; Process for the preparation thereof; Anti-bacterial composition; Intermediate for the 3-propenylcephem derivative; and Process for the preparation of the intermediate.
摘要:
In one embodiment, a photomask designing method for creating a pattern layout having an assist pattern placed around a design pattern is disclosed. The method can place a plurality of evaluation points around the design pattern and set an evaluation index for imaging properties of the design pattern on an imaging surface. The method can combine a light intensity distribution of the design pattern with light intensity distributions of the evaluation points to obtain a light intensity distribution on the imaging surface and evaluate the light intensity distribution on the imaging surface using the evaluation index to determine a region having an effective evaluation point placed. In addition, the method can determine a placement condition for the assist pattern based on the region where the effective evaluation point is placed and place the assist pattern around the design pattern based on the placement condition to create the pattern layout.
摘要:
A semiconductor device manufacturing method includes applying illumination light to a photomask, and projecting diffracted light components from the photomask via a projection optical system to form a photoresist pattern on a substrate. The photomask includes a plurality of opening patterns which are arranged on each of a plurality of parallel lines at regular second intervals in a second direction and which have regular first intervals in a first direction perpendicular to the second direction. The plurality of opening patterns arranged on the adjacent ones of the plurality of parallel lines are displaced from each other half the second interval in the second direction. Moreover, the dimensions of the plurality of opening patterns and the complex amplitude transmittance of nontransparent region in the photomask are set so that three of the diffracted light components passing through the pupil of the projection optical system have equal amplitude.
摘要:
According to one embodiment, a semiconductor device includes a substrate, conductive members, an interlayer insulating film, and a plurality of contacts. The conductive members are provided in an upper portion of the substrate or above the substrate to extend in one direction. The interlayer insulating film is provided on the substrate and the conductive members. The plurality of contacts is provided in the interlayer insulating film. In a first region on the substrate, the contacts are located at some of lattice points of an imaginary first lattice. In a second region on the substrate, the contacts are located at some of lattice points of an imaginary second lattice. The second lattice is different from the first lattice. Each of the first lattice and the second lattice includes some of the lattice points located on the conductive members or on an extension region extended in the one direction of the conductive members. A position of each of the lattice points located on the conductive members and the extension region in the one direction is periodically displaced based on every n consecutively-arranged conductive members (n is a natural number).
摘要:
According to one embodiment, a method is disclosed for determining position of an auxiliary pattern on a photomask. The method can include generating a first set for each of three or more imaging positions of an exposure optical system. The method can include generating a second set for each of the three or more imaging positions by inverse Fourier transforming each of the first set. The method can include calculating a second order differential with respect to the imaging position of an index indicating amplitude of light belonging to the second set. In addition, the method can include extracting a position where the second order differential assumes an extremal value on an imaging plane of the exposure optical system. At least part of positions on the photomask each corresponding to the position assuming the extremal value on the imaging plane is used as a formation position of the auxiliary pattern.