CLAIMS
1. A method for producing an antenna substrate, comprising
the steps of:
(1) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate;
(2) processing the coating film into a pattern corresponding to an antenna by photolithography; and
(3) curing the pattern corresponding to an antenna into an antenna.
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2. The method for producing an antenna substrate according to claim 1, wherein the antenna has a thickness of 1 to 10 pm.
3. A method for producing an antenna substrate with wiring line and electrode, comprising the steps of:
(1) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate;
(2-A) processing the coating film into a pattern corresponding to an antenna by photolithography;
■ (2-B) processing the coating film into a pattern corresponding to a wiring line by photolithography;
(2-C) processing the coating film into a pattern

corresponding to an electrode by photolithography;
(3-A) curing the pattern corresponding to an antenna into an antenna;
(3-B) curing the pattern corresponding to a wiring line" into a wiring line; and
(3-C) curing the pattern corresponding to an electrode into an electrode.
4 . The method for producing an antenna substrate with wiring line and electrode according to claim 3, wherein steps (2-A), (2-B), and (2-C) are performed in a batch manner.
5. The method for producing an antenna substrate with wiring line and electrode according to claim 3, wherein step (1) includes the following steps (1-A) and (1-B):
(1-A) forming a first coating film using a first photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate; and
(1-B) forming a second coating film using a second photosensitive paste containing a conductive material and a photosensitive organic component on the insulating substrate;
step (2-A) is a step of processing the first coating film into a pattern corresponding to an antenna by photolithography;
step (2-B) includes a step of processing the second

coating film into a pattern corresponding to a wiring line by photolithography; and
step (2-C) includes a step of processing the second coating' film into a pattern corresponding to an electrode by photolithography.
6. The method for producing an antenna substrate with wiring line and electrode according to claim 5, wherein in step (1-B) , the second coating film is formed so as to overlap a part of the antenna.
7 . The method for producing an antenna substrate with wiring line and electrode according to any one of claims 3 to 6, wherein the antenna has a thickness of 1 to 10 |am, and the wiring line and the electrode each have a thickness of 0.05 to 1.0 |xm.
8 .' The method for producing an antenna substrate with wiring line and electrode according to any one of claims 5 to 7, wherein in step (1-B), the coating film is formed by any one of a dispenser coating method, an inkjet coating method, and an electrostatic coating method.
9. A method for producing an antenna substrate with wiring line and electrode, comprising the steps of:
(1-P) forming a coating film using a photosensitive paste

containing a conductive material and a photosensitive organic component on an insulating substrate having an antenna thereon;
(2-P-B) processing the coating film into a pattern corresponding to a wiring line by photolithography;
(2-P-C) processing the coating film into a pattern corresponding to an electrode by photolithography;
(3-P-B) curing the pattern corresponding to a wiring line into a wiring line; and
(3-P-C)' curing the pattern corresponding to an electrode into an electrode.
10. The method for producing an antenna substrate with wiring line and electrode according to claim 9, wherein steps (2-P-B) and (2-P-C) are performed in a batch manner.
11. The method for producing an antenna substrate with wiring line and electrode according to claim 9 or 10, wherein in step (1-P), the coating film is formed so as to overlap a part of the antenna.
12 . The method for producing an" antenna substrate with wiring line and electrode according to any one of claims 9to 11, wherein the insulating substrate having the antenna thereon is produced by a method including a step of bonding a conductive material to the insulating substrate.

13 . The method for producing an antenna substrate with wiring line and electrode according to any one of claims 3 to 12, wherein the photosensitive organic component contains a compound having a urethane group.
14 . The method for producing an antenna substrate with wiring line and electrode according to any one of claims 3 to 13, wherein the insulating substrate contains at least one resin selected from polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, polyphenylene sulfone, a cycloolefin polymer, a polyamide, and a polyimide.
15. A method for producing an RFID element, comprising the
steps of:
(1) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate;
(2) processing the coating film into a pattern corresponding to an antenna by photolithography;
(3) curing the pattern corresponding to an antenna into an antenna to give an antenna substrate; and
(4) mounting an IC chip on the antenna substrate.
16. A method for producing an RFID element, comprising the

steps of:
(1) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate;
(2-A) processing the coating film into a pattern corresponding to an antenna by photolithography;
(2-B) processing the coating film into a pattern corresponding to a wiring line by photolithography;
(2-C), processing the coating film into a pattern corresponding to an electrode by photolithography;
(3-A) curing the pattern corresponding to an antenna into an antenna;
(3-B) curing the pattern corresponding to a wiring line into a wiring line;
(3-C) curing the pattern corresponding to an electrode into one or more electrodes"to give an antenna substrate with wiring line and electrode; and
(4-S) forming a semiconductor layer on one or more of the electrodes or between the electrodes of the antenna substrate with wiring line and electrode.
17. A method for producing an RFID element, comprising the steps of:
(1-P) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic

component on an insulating substrate having an antenna thereon;
(2-P-B) processing the coating film into a pattern corresponding to a wiring line by photolithography;
(2-P-C) processing the coating film into a pattern corresponding to an electrode by photolithography;
(3-P-B) curing the pattern corresponding to a wiring line into a wiring line;
(3-P-C) curing the pattern corresponding to an electrode into one or more electrodes to give an antenna substrate with wiring line and electrode; and
(4-S) forming a semiconductor layer on one or more of the electrodes or between the electrodes of the antenna substrate with wiring line and electrode.
18. The method for producing an RFID element according to claim 16 or 17, wherein step (4-S) includes a step of applying a solution containing carbon nanotubes.