Resonant frequency characteristic tag and method of manufacturing the same

Claim 1

A resonant frequency characteristic tag comprising: a thin dielectric film comprising a polymer, a pair of resonant frequency characteristic circuits each formed on a respective side of said thin dielectric film, made of a metal foil and having a particular resonant frequency, said two resonant frequency characteristic circuits having terminal sections short-circuited to one another, a release paper applied by a pressure sensitive adhesive to the surface of one of said two resonant frequency characteristic circuits, and a through hole with a diameter in a range between 0.5 mm and 3 mm being formed through an electrode plate in a capacitor section in the surface of said one circuit to which said release paper is applied such that it reaches an electrode plate in a capacitor section in the surface of the other circuit, the distance between said two electrode plates being thus adjusted to a predetermined distance of 0.0003 mm or less at a portion at the periphery of said through hole.

Claim 15

A method of manufacturing a resonant frequency characteristic tag comprising the steps of: forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer by laminating a metal foil on each respective side and printing a printed circuit pattern on said metal foil of each respective side, causing a short-circuit between terminal sections of said two resonant frequency characteristic circuits on said respective sides of said dielectric film, applying a release paper to one of said two circuits using a pressure sensitive adhesive, forming a through hole with a diameter in a range between 0.5 mm and 3 mm through an electrode plate in a capacitor section in the surface of said one circuit to which said release paper is applied such that it reaches an electrode plate of a capacitor section in the surface of the other circuit, and adjusting the distance between said two electrode plates to a predetermined distance of 0.0005 mm or less by heating and pressing a portion at the periphery of said through hole with a suitable tool.

Claim 16

A method of manufacturing a resonant frequency characteristic tag comprising the steps of: forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer by laminating a metal foil on each respective side and printing a printed circuit pattern on said metal foil of each respective side, causing a short-circuit between terminal sections of said two resonant frequency characteristic circuits on said respective sides of said dielectric film, applying a release paper to one of said two circuits using a pressure sensitive adhesive, forming a through hole with a diameter in a range between 0.5 mm and 3 mm through an electrode plate in a capacitor section in the surface of said one circuit to which said release paper is applied such that it reaches an electrode plate of a capacitor section in the surface of the other circuit, and adjusting the distance between said two electrode plates to a predetermined distance of 0.0005 mm or less by heating and pressing a portion at the periphery of said through hole with a suitable tool.

Claim 20

A method of manufacturing a resonant frequency characteristic tag, comprising the steps of: forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer, by laminating a metal foil on each respective side, printing a printed circuit pattern on said metal foil on each respective side and carrying out a chemical etching treatment, causing a short-circuit between terminal sections of the metal foils on said respective sides, applying a release paper to one of said two circuits using a pressure sensitive adhesive, forming a through hole with a diameter in a range of 0.5 mm to 3 mm through an electrode plate of a capacitor section in the surface of said one circuit to which said release paper is applied such that it reaches an electrode plate of a capacitor section in the surface of the other circuit, adjusting the distance between said two electrode plates to a predetermined distance of 0.0003 mm or less by pressing a portion of the electrode plate of said other circuit corresponding to the periphery of said through hole with a tool heated to a temperature in a range of 200° to 250° C., applying a paper to the side of said dielectric opposite said release paper using an adhesive, and then cutting the thus prepared resonant frequency characteristic sheet to a predetermined size to obtain the resonant frequency characteristic tag.

Claim 21

A method of manufacturing a resonant frequency characteristic tag, comprising the steps of: forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer, by laminating a metal foil on each respective side, printing a printed circuit pattern on said metal foil on each respective side and carrying out a chemical etching treatment, causing a short-circuit between terminal sections of the metal foils on said respective sides, applying a release paper to one of said two circuits using a pressure sensitive adhesive, forming a through hole with a diameter in a range of 0.5 mm to 3 mm through an electrode plate of a capacitor section in the surface of said one circuit to which said release paper is applied such that it reaches an electrode plate of a capacitor section in the surface of the other circuit, adjusting the distance between said two electrode plates to a predetermined distance of 0.0003 mm or less by pressing a portion of the electrode plate of said other circuit corresponding to the periphery of said through hole with a tool heated to a temperature in a range of 200° to 250° C., applying a paper to the side of said dielectric opposite said release paper using an adhesive, and then cutting the thus prepared resonant frequency characteristic sheet to a predetermined size to obtain the resonant frequency characteristic tag.

Claim 27

A method of manufacturing a resonant frequency characteristic tag, comprising the steps of forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer together with a hole for providing a short-circuit between said two circuits, by applying a metal foil on each respective side, printing an etching-resist ink on the metal foil of each side such that a printed circuit is formed on each side with a capacitor section having an electrode plate, forming a circular opening with a diameter in a range of 0.3 mm to 2 mm in the electrode plate of one of said two circuits such that the opening overlaps with a portion of the electrode plate in the other circuit, and carrying out a chemical etching treatment, causing a short-circuit between terminal sections of both said metal foils, applying a release paper to said one of said two circuits using a pressure sensitive adhesive, adjusting the distance between said two electrodes to a predetermined distance of 0.0003 mm or less by urging a portion of the electrode plate of the other circuit in the periphery of the opening inclusive of the opening toward said opening with a tool heated to a surface temperature in a range of 200° to 250° C., applying a paper to the side of said dielectric opposite said release paper using an adhesive, and cutting the thus prepared resonant frequency characteristic sheet to a predetermined size to obtain the resonant frequency characteristic tag.

Claim 28

A method of manufacturing a resonant frequency characteristic tag, comprising the steps of forming a pair of resonant frequency characteristic circuits having a particular resonant frequency on respective sides of a thin dielectric film comprising a polymer together with a hole for providing a short-circuit between said two circuits, by applying a metal foil on each respective side, printing an etching-resist ink on the metal foil of each side such that a printed circuit is formed on each side with a capacitor section having an electrode plate, forming a circular opening with a diameter in a range of 0.3 mm to 2 mm in the electrode plate of one of said two circuits such that the opening overlaps with a portion of the electrode plate in the other circuit, and carrying out a chemical etching treatment, causing a short-circuit between terminal sections of both said metal foils, applying a release paper to said one of said two circuits using a pressure sensitive adhesive, adjusting the distance between said two electrodes to a predetermined distance of 0.0003 mm or less by urging a portion of the electrode plate of the other circuit in the periphery of the opening inclusive of the opening toward said opening with a tool heated to a surface temperature in a range of 200° to 250° C., applying a paper to the side of said dielectric opposite said release paper using an adhesive, and cutting the thus prepared resonant frequency characteristic sheet to a predetermined size to obtain the resonant frequency characteristic tag.