Card type wireless device, antenna coil, and method for manufacturing communication module
First Claim
Patent Images
1. An antenna coil comprising:
- an air-core type flat coil body having a thickness in an axial direction of the coil body; and
a coil support member disposed between the coil body and a substrate as a mounting object of the antenna coil so that the coil body is supported on a surface of the substrate, wherein the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, and the coil support member is made of resin hardened soft magnetic material.
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Accused Products
Abstract
An antenna coil includes: an air-core type flat coil body; and a coil support member disposed between the coil body and a substrate so that the coil body is supported on a surface of the substrate. The thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body. The coil support member is made of resin hardened soft magnetic material.
35 Citations
23 Claims
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1. An antenna coil comprising:
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an air-core type flat coil body having a thickness in an axial direction of the coil body; and
a coil support member disposed between the coil body and a substrate as a mounting object of the antenna coil so that the coil body is supported on a surface of the substrate, wherein the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, and the coil support member is made of resin hardened soft magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for manufacturing a communication module having an antenna coil and a transmitting/receiving circuit, which are mounted on a substrate, wherein the antenna coil is connected to the transmitting/receiving circuit, the method comprising the steps of:
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positioning a coil side terminal of the antenna coil together with a solder member for connecting between a substrate side terminal of the substrate and the coil side terminal of the antenna coil; and
heating the substrate together with the antenna coil in a solder reflow furnace so that the solder member is melted and soldered between the coil side terminal and the substrate side terminal, wherein the antenna coil further includes;
an air-core type flat coil body having a thickness in an axial direction of the coil body; and
a coil support member disposed between the coil body and a substrate as a mounting object of the antenna coil so that the coil body is supported on a surface of the substrate, the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, the coil support member is a coil case having a coil accommodation space for accommodating the coil body therein, the coil case includes a ring shape body corresponding to the coil body, and the coil case includes a part, which is made of the resin hardened soft magnetic material. - View Dependent Claims (12, 13, 14)
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15. A card type wireless device comprising:
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a communication module having an antenna coil, a transmitting/receiving circuit connecting to the antenna coil, and a substrate; and
a card type casing, wherein the antenna coil includes;
an air-core type flat coil body having a thickness in an axial direction of the coil body; and
a coil support member disposed between the coil body and a substrate as a mounting object of the antenna coil so that the coil body is supported on a surface of the substrate, the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular the an axial direction of the coil body, the coil support member is made of resin hardened soft magnetic material, the coil body includes an axis, which coincides with a normal line of the substrate, and the card type casing accommodates the communication module in such a manner that a thickness direction of the substrate coincides with a thickness direction of the card type casing. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification