Semiconductor device manufacturing method, data generating apparatus, data generating method and recording medium readable by computer recoded with data generating program
View Patent ↗A semiconductor manufacturing method comprising, a data generating process including, acquiring a simulation light pattern that simulates a shape of a light exposure pattern formed on a substrate on the basis of design data of a semiconductor device, acquiring a simulation electron beam exposure pattern that simulates a shape of an electron beam exposure pattern formed by an electron beam exposure on the substrate on the basis of the design data, extracting difference information representing a shape difference portion between the simulation light pattern and the simulation electron beam exposure pattern, acquiring changed design data for modifying shape by changing the design data in accordance with the difference information, conducting the electron beam exposure on the substrate by use of the changed design data for modifying the shape.
1. A data generating apparatus, comprising:
a light pattern storage unit stored with a shape of a light exposure pattern formed on a substrate by a light exposure on the basis of design data of a semiconductor device;
an electron beam exposure pattern storage unit stored with a shape of an electron beam exposure pattern formed on the substrate by an electron beam exposure on the basis of the design data;
a light-electron difference extracting unit to extract light-electron difference information representing a difference portion between the shape of the light exposure pattern and the shape of the electron beam exposure pattern; and
a data modifying unit to modify the design data in accordance with the light-electron difference information.
2. A data generating apparatus according to claim 1 , wherein the data modifying unit changes the design data for modifying shape specified by the design data to the shape of the light exposure pattern in accordance with the difference information.
3. A data generating apparatus according to claim 2 , further comprising:
a light exposure data generating unit to generate light exposure data used for a light exposure simulation from the design data; and
an electron beam exposure data generating unit to generate electron beam exposure data used for an electron beam exposure simulation from the design data or from the changed design data for modifying the shape,
wherein the light exposure data generating unit executes a correcting process including at least one of generation of a dummy pattern for planarization, an optical proximity effect correction, a local flare correction and a microloading effect correction for etching, and
the electron beam exposure data generating unit executes a correcting process including at least one of the generation of the dummy pattern for the planarization, the proximity effect correction, a stitching correction and the microloading effect correction for etching.
4. A data generating apparatus according to claim 3 , further comprising:
a light exposure simulation unit to generate a shape of the light exposure pattern from the light exposure data; and
an electron beam exposure simulation unit to generate a shape of the electron beam exposure pattern from the electron beam exposure data.
5. A data generating apparatus according to claim 2 , wherein the difference extracting unit includes a restraining unit that restrains the difference information from being extracted if a dimension of the difference portion is smaller than a predetermined allowable value.
6. A data generating apparatus according to claim 2 , further comprising a library storage unit for an electron beam exposure, stored with data that is changed for modifying the shape into a shape simulating the light exposure pattern from partial circuit data used in common to a plurality of semiconductor devices in the design data.
7. A data generating apparatus according to claim 6 , further comprising:
a replacing unit to replace the partial circuit data with the data stored in the library storage unit for the electron beam exposure with respect to design data of the semiconductor device that is formed by referring to the partial circuit data; and
a converting unit to convert, into exposure data for the electron beam exposure, the design data of the semiconductor device in which the partial circuit data is replaced with the data stored in the library storage unit for the electron beam exposure.
8. A data generating apparatus according to claim 6 , wherein the design data contains via-hole data and wiring data, and
the library storage unit for the electron beam exposure is stored with such a piece of data that the via-hole data is changed for modifying the shape into a shape simulating the light exposure pattern and with such a piece of data that the wiring data is changed for modifying the shape into a shape simulating the light exposure pattern.
9. A data generating apparatus according to claim 2 , wherein the data modifying unit includes:
a light increment generating unit to generate a light increment pattern remaining as a result of subtracting the shape of the electron beam exposure pattern from the shape of the light exposure pattern;
an electron beam increment generating unit to generate an electron beam increment pattern remaining as a result of subtracting the shape of the light exposure pattern from the shape of the electron beam exposure pattern; and
an arithmetic unit to add data based on the light increment pattern to the design data, and to subtract data based on the electron beam increment pattern from the design data.
10. A data generating apparatus according to claim 9 , further comprising:
a first setting unit setting a piece of identifying information at an identifying side corresponding to a boundary line between the light exposure pattern and the electron beam exposure pattern in external shape sides forming an external shape of the light increment pattern;
a second setting unit setting a piece of identifying information at an identifying side other than the side corresponding to the boundary line between the light exposure pattern and the electron beam exposure pattern in external shape sides forming an external shape of the electron beam exposure pattern; and
a position correcting unit locating the identifying side in a position of a correction-undergone side located in the vicinity of the identifying side, among external shape sides forming a pattern contained in the design data or the changed design data for modifying the shape.
11. A semiconductor manufacturing method, comprising:
a data generating process including:
acquiring a simulation light pattern that simulates a shape of a light exposure pattern formed on a substrate on the basis of design data of a semiconductor device;
acquiring a simulation electron beam exposure pattern that simulates a shape of an electron beam exposure pattern formed by an electron beam exposure on the substrate on the basis of the design data;
extracting light-electron difference information representing a shape difference portion between the simulation light pattern and the simulation electron beam exposure pattern; and
acquiring changed design data for modifying shape by changing the design data in accordance with the light-electron difference information; and
conducting the electron beam exposure on the substrate by use of the changed design data for modifying the shape.
12. A semiconductor manufacturing method according to claim 11 , wherein the data generating process further includes:
generating light exposure data used for a light exposure simulation from the design data; and
generating electron beam exposure data used for an electron beam exposure simulation from the design data or from the changed design data for modifying the shape,
wherein the generating light exposure data includes executing a correcting process including at least one of generation of a dummy pattern for planarization, an optical proximity effect correction, a local flare correction and a microloading effect correction for etching, and
the generating electron beam exposure data includes executing a correcting process including at least one of the generation of the dummy pattern for the planarization, the proximity effect correction, a stitching correction and the microloading effect correction for etching.
13. A semiconductor manufacturing method according to claim 12 , wherein the data generating process further includes:
generating a shape of the light exposure pattern from the light exposure data; and
generating a shape of the electron beam exposure pattern from the electron beam exposure data.
14. A semiconductor manufacturing method according to claim 11 , wherein the extracting difference information includes restraining the difference information from being extracted if a dimension of the difference portion is smaller than a predetermined allowable value.
15. A semiconductor manufacturing method according to claim 11 , wherein the data generating process further includes storing a library storage unit for an electron beam exposure with data that is changed for modifying the shape into a shape simulating the light exposure pattern from partial circuit data used in common to a plurality of semiconductor devices in the design data.
16. A semiconductor manufacturing method according to claim 15 , wherein the data generating process further includes:
replacing the partial circuit data with the data stored in the library storage unit for the electron beam exposure with respect to design data of the semiconductor device that is formed by referring to the partial circuit data; and
converting, into exposure data for the electron beam exposure, the design data of the semiconductor device in which the partial circuit data is replaced with the data stored in the library storage unit for the electron beam exposure.
17. A semiconductor manufacturing method according to claim 15 , wherein the design data contains via-hole data and wiring data, and
the library storage unit for the electron beam exposure is stored with such a piece of data that the via-hole data is changed for modifying the shape into a shape simulating the light exposure pattern and with such a piece of data that the wiring data is changed for modifying the shape into a shape simulating the light exposure pattern.
18. A semiconductor manufacturing method according to claim 11 , wherein the data generating process further includes:
generating a light increment pattern remaining as a result of subtracting the shape of the electron beam exposure pattern from the shape of the light exposure pattern;
generating an electron beam increment pattern remaining as a result of subtracting the shape of the light exposure pattern from the shape of the electron beam exposure pattern; and
adding data based on the light increment pattern to the design data, and subtracting data based on the electron beam increment pattern from the design data.
19. A semiconductor manufacturing method according to claim 18 , wherein the data generating process further includes:
a first setting step of setting a piece of identifying information at an identifying side corresponding to a boundary line between the light exposure pattern and the electron beam exposure pattern in external shape sides forming an external shape of the light increment pattern;
a second setting step of setting a piece of identifying information at an identifying side other than the side corresponding to the boundary line between the light exposure pattern and the electron beam exposure pattern in external shape sides forming an external shape of the electron beam exposure pattern; and
locating the identifying side in a position of a correction-undergone side located in the vicinity of the identifying side in external shape sides forming a pattern contained in the design data or the changed design data for modifying the shape.