RFID antenna modules and methods
First Claim
Patent Images
1. An antenna module (AM) for a smart card (SC) comprising:
- a substrate (MT);
a chip (CM) disposed on a surface of the substrate (MT) and flip-chip connected to pads on the surface of the substrate (MT); and
an antenna (MA) disposed on the surface of the substrate (MT), and connected with the chip (CM);
characterized by;
a support structure (DS, WC) secured to the surface of the substrate (MT), serving as a winding core for the antenna (MA);
wherein the support structure (DS, WC) comprises a tubular body portion (B) having two opposite open ends, one of which is secured to the surface of the substrate (MT), the other of which is a free end; and
wherein the support structure serves as a dam for glob-top (GT) covering at least the chip (CM) within the support structure.
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Abstract
An RFID chip (CM) is flip-chip mounted and connected to a surface of a substrate (MT), such as for a 6-pad ISO smart card antenna module (AM). A winding core (WC) for an antenna (MA) stiffens, stabilizes and planarizes substrate (MT) to enhance reliability of the connections. The flip-chip antenna module (FCAM) interfaces with a contactless reader. Contact pads (CP) on the opposite side of the substrate (MT) provide a contact interface. Also disclosed is first forming an antenna (MA) on an antenna substrate (AS), then joining it to the module substrate (MT). Such an antenna may be an embedded wire, or an etched metal layer.
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Citations
15 Claims
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1. An antenna module (AM) for a smart card (SC) comprising:
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a substrate (MT); a chip (CM) disposed on a surface of the substrate (MT) and flip-chip connected to pads on the surface of the substrate (MT); and an antenna (MA) disposed on the surface of the substrate (MT), and connected with the chip (CM); characterized by; a support structure (DS, WC) secured to the surface of the substrate (MT), serving as a winding core for the antenna (MA); wherein the support structure (DS, WC) comprises a tubular body portion (B) having two opposite open ends, one of which is secured to the surface of the substrate (MT), the other of which is a free end; and wherein the support structure serves as a dam for glob-top (GT) covering at least the chip (CM) within the support structure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making an antenna module (AM) comprising:
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flip chip mounting and bonding a chip (CM) to a substrate (MT); characterized by; affixing a tubular support structure (DS, WC) having two opposite open ends on a surface of the substrate (MT); and after affixing the tubular support structure on the surface of the module tape (MT), winding a wire for an antenna (MA) around the tubular support structure (DS, WC). - View Dependent Claims (8, 9, 10)
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11. An antenna module (AM) suitable for being disposed in a card body (CB) of a smart card (SC) comprising:
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a module substrate (MT); and a chip (CM) disposed on a surface of the module substrate (MT); characterized by; an antenna (MA) disposed on an antenna substrate (AS) which is separate from the module substrate (MT); an opening (OP) in the antenna substrate (AS) for accommodating the chip (CM) when the antenna substrate (AS) is joined to the module substrate (MT). - View Dependent Claims (12, 13, 14, 15)
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Specification