US6100804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency identification system
Assignee: Intermec IP Corp
•
Filing: 1998-10-29
•
Granted: 2000-08-08
•
Expires: 2018-10-29
Abstract
Abstract A radio frequency identification system employing a thin, flexible electronic radio frequency identification (RFID) tag having an overall thickness not exceeding approximately 280 microns and the process for its manufacture is disclosed. The RFID tag includes an insulating, flexible substrate having an aperture formed therein for receiving an RFID circuit chip. An antenna forming an integral part of the substrate is electrically connected to circuit chip. A cured adhesive having a portion substantially parallel with the substrate encapsulates the circuit chip so that the chip is operably retained within the substrate aperture.
Inventors
- 👤 Michael J. Brady
- 👤 Dah-Weih Duan
- 👤 Venkata S. R. Kodukula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:52
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/28; A; A01; A01K; A01K11/00; A01K11/006; G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; H01Q1/00; H01Q1/36; H01Q1/38; H01Q7/00; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H10; H10W; H10W72/00; H10W72/071; H10W72/072; H10W72/07251; H10W72/20; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
87 words
A thin flexible electronic radio frequency tag circuit comprising: a. an insulating, flexible substrate having an aperture therein; b. an antenna forming an integral part of said substrate; c. a circuit chip having an antenna connector, said circuit chip being substantially and operably located within the aperture of said substrate; d. a connector for electrically connecting said antenna to said chip antenna connector; and e. an encapsulant having a flattened outer surface substantially parallel with said substrate, said encapsulant operably retaining said circuit chip within said substrate.
Claim 2
Dependent Claim
87 words
A thin flexible electronic radio frequency tag circuit comprising: a. an insulating, flexible substrate having an aperture therein; b. an antenna forming an integral part of said substrate; c. a circuit chip having an antenna connector, said circuit chip being substantially and operably located within the aperture of said substrate; d. a connector for electrically connecting said antenna to said chip antenna connector; and e. an encapsulant having a flattened outer surface substantially parallel with said substrate, said encapsulant operably retaining said circuit chip within said substrate.
Claim 3
Dependent Claim
45 words
A circuit, as in claim 1, wherein said encapsulant is milled after cure so as to reduce the overall cross-sectional thickness of said encapsulant and thereby providing a thin flexible electronic radio frequency tag having a cross-sectional profile thickness not unnecessarily increased by said encapsulant.
Claim 4
Dependent Claim
18 words
A circuit, as in claim 1, wherein said substrate has at least one dimension not exceeding 200 microns.
Claim 5
Dependent Claim
19 words
A circuit, as in claim 3, wherein said circuit chip has at least one dimension not exceeding 200 microns.
Claim 6
Dependent Claim
24 words
A circuit, as in claim 3, wherein said finished encapsulant does not increase the overall thickness of said substrate by more than 90 microns.
Claim 7
Dependent Claim
23 words
A circuit, as in claim 1, wherein said thin flexible electronic radio frequency tag has at least one dimension not exceeding 280 microns.
Claim 8
Dependent Claim
15 words
A circuit, as in claim 1, wherein said substrate is a fire-proof circuit board material.
Claim 9
Dependent Claim
12 words
A circuit, as in claim 1, wherein said substrate is an organic.
Claim 10
Dependent Claim
11 words
A circuit, as in claim 8, wherein said substrate is polyimide.
Claim 11
Dependent Claim
11 words
A circuit, as in claim 8, wherein said substrate is polyester.
Claim 12
Dependent Claim
40 words
A circuit, as in claim 1, wherein said connector for electrically connecting said antenna to said chip antenna connector is made using any of the bonding types including wire bonding, thermal compression, single point bonding, C4 bonding, and conductive adhesive.
Claim 13
Dependent Claim
24 words
A circuit, as in claim 1, wherein said connector for electrically connecting said antenna to said chip antenna connector is low profile wire bonding.
Claim 14
Dependent Claim
16 words
A circuit, as in claim 1, wherein said circuit is laminated on at least one side.
Claim 15
Dependent Claim
26 words
A circuit, as in claim 1, wherein said antenna is a resonant antenna and is one of the following structures including folded dipole, dipole, and loop.
Claim 16
Dependent Claim
13 words
A circuit, as in claim 14, further including an antenna impedance adjustment element.
Claim 17
Dependent Claim
19 words
A circuit, as in claim 15, wherein said antenna impedance adjustment element is an integral part of said substrate.
Claim 18
Dependent Claim
14 words
A circuit, as in claim 16, wherein said antenna impedance adjustment element is parasitic.
Claim 19
Dependent Claim
51 words
A circuit, as in claim 1, wherein a battery is affixed to the substrate in adjacent proximity to the antenna and chip and is connected by one or more battery connecting lines to two or more chip battery contacts wherein the battery contacts are coplanar with the antenna and connecting lines.
Claim 20
Dependent Claim
25 words
A circuit, as in claim 1, wherein said encapsulant encapsulates said chip within said aperture and said chip to said antenna and said chip connector.
Claim 21
Dependent Claim
29 words
A circuit, as in claim 19, wherein said encapsulant forms an at least somewhat flexible bond between said chip within said substrate aperture and said antenna and chip connector.
Claim 22
Dependent Claim
23 words
A circuit, as in claim 19, wherein said encapsulant forms at least one surface coplanar with at least one surface of said substrate.
Claim 23
Dependent Claim
172 words
A thin flexible electronic radio frequency tag circuit comprising: a. an insulating, flexible substrate having an aperture therein; b. an antenna forming an integral part of said substrate; c. a circuit chip having a modulator circuit, a logic circuit, a memory circuit, and chip antenna connector, said circuit chip being substantially and operably located within the aperture of said substrate such that an annular space is formed between said chip and said substrate; d. a connector for electrically connecting said antenna to said chip antenna connector; and e. a fastener filling the annular space between said circuit chip and said substrate aperture for securing said circuit chip within said substrate aperture and forming a protective covering over said circuit chip, said antenna connector and at least some portion of said antenna, said fastener having a flattened cross-sectional profile including a bottom surface coplanar to the bottom surface of said substrate and a generally flat upper surface parallel to said bottom surface whereby the cross-sectional thickness of said circuit is not unnecessarily increased.
Claim 24
Dependent Claim
172 words
A thin flexible electronic radio frequency tag circuit comprising: a. an insulating, flexible substrate having an aperture therein; b. an antenna forming an integral part of said substrate; c. a circuit chip having a modulator circuit, a logic circuit, a memory circuit, and chip antenna connector, said circuit chip being substantially and operably located within the aperture of said substrate such that an annular space is formed between said chip and said substrate; d. a connector for electrically connecting said antenna to said chip antenna connector; and e. a fastener filling the annular space between said circuit chip and said substrate aperture for securing said circuit chip within said substrate aperture and forming a protective covering over said circuit chip, said antenna connector and at least some portion of said antenna, said fastener having a flattened cross-sectional profile including a bottom surface coplanar to the bottom surface of said substrate and a generally flat upper surface parallel to said bottom surface whereby the cross-sectional thickness of said circuit is not unnecessarily increased.
Claim 25
Dependent Claim
25 words
A circuit, as in claim 22, wherein said chip fastener does not substantially reduce the overall flexibility of said circuit about more than one axis.
Claim 26
Dependent Claim
23 words
A circuit, as in claim 22, wherein said thin flexible electronic radio frequency tag has at least one dimension not exceeding 280 microns.
Claim 27
Dependent Claim
99 words
A thin flexible electronic radio frequency tag circuit, comprising: a. a substrate having an aperture thereon for receiving a radio frequency circuit chip; b. a radio frequency circuit chip disposed within said substrate aperture; c. an antenna disposed on said substrate and coupled to said radio frequency circuit chip; and d. an encapsulant disposed on said substrate for encapsulating said radio frequency circuit chip, said encapsulant having a flattened outer surface substantially parallel with said substrate thereby providing a reduced thickness to allow the tag to pass through a printer without causing damage to said tag or said printer.
Claim 28
Dependent Claim
99 words
A thin flexible electronic radio frequency tag circuit, comprising: a. a substrate having an aperture thereon for receiving a radio frequency circuit chip; b. a radio frequency circuit chip disposed within said substrate aperture; c. an antenna disposed on said substrate and coupled to said radio frequency circuit chip; and d. an encapsulant disposed on said substrate for encapsulating said radio frequency circuit chip, said encapsulant having a flattened outer surface substantially parallel with said substrate thereby providing a reduced thickness to allow the tag to pass through a printer without causing damage to said tag or said printer.
Claim 29
Dependent Claim
45 words
A circuit, as in claim 25, wherein said encapsulant is milled after cure so as to reduce the overall cross-sectional thickness of said encapsulant and thereby providing a thin flexible electronic radio frequency tag having a cross-sectional profile thickness not unnecessarily increased by said encapsulant.
Claim 30
Dependent Claim
24 words
A circuit, as in claim 26, wherein said finished encapsulant does not increase the overall thickness of said substrate by more than 90 microns.
Claim 31
Dependent Claim
18 words
A circuit, as in claim 25, wherein said substrate has at least one dimension not exceeding 200 microns.
Claim 32
Dependent Claim
19 words
A circuit, as in claim 28, wherein said circuit chip has at least one dimension not exceeding 200 microns.
Claim 33
Dependent Claim
23 words
A circuit, as in claim 25, wherein said thin flexible electronic radio frequency tag has at least one dimension not exceeding 280 microns.
Claim 34
Dependent Claim
15 words
A circuit, as in claim 25, wherein said substrate is a fire-proof circuit board material.
Claim 35
Dependent Claim
12 words
A circuit, as in claim 25, wherein said substrate is an organic.
Claim 36
Dependent Claim
11 words
A circuit, as in claim 32, wherein said substrate is polyimide.
Claim 37
Dependent Claim
11 words
A circuit, as in claim 32, wherein said substrate is polyester.
Claim 38
Dependent Claim
33 words
A circuit, as in claim 25, wherein said antenna is coupled to said chip using any of the bonding types including wire bonding, thermal compression, single point bonding, C4 bonding, and conductive adhesive.
Claim 39
Dependent Claim
19 words
A circuit, as in claim 25, wherein said antenna is coupled to said chip using low profile wire bonding.
Claim 40
Dependent Claim
16 words
A circuit, as in claim 25, wherein said circuit is laminated on at least one side.
Claim 41
Dependent Claim
26 words
A circuit, as in claim 25, wherein said antenna is a resonant antenna and is one of the following structures including folded dipole, dipole, and loop.
Claim 42
Dependent Claim
13 words
A circuit, as in claim 38, further including an antenna impedance adjustment element.
Claim 43
Dependent Claim
19 words
A circuit, as in claim 39, wherein said antenna impedance adjustment element is an integral part of said substrate.
Claim 44
Dependent Claim
14 words
A circuit, as in claim 40, wherein said antenna impedance adjustment element is parasitic.
Claim 45
Dependent Claim
29 words
A circuit, as in claim 41, wherein said encapsulant forms an at least somewhat flexible bond between said chip within said substrate aperture and said antenna and chip connector.
Claim 46
Dependent Claim
23 words
A circuit, as in claim 39, wherein said encapsulant forms at least one surface coplanar with at least one surface of said substrate.
Claim 47
Dependent Claim
51 words
A circuit, as in claim 25, wherein a battery is affixed to the substrate in adjacent proximity to the antenna and chip and is connected by one or more battery connecting lines to two or more chip battery contacts wherein the battery contacts are coplanar with the antenna and connecting lines.
Claim 48
Dependent Claim
25 words
A circuit, as in claim 25, wherein said encapsulant encapsulates said chip within said aperture and said chip to said antenna and said chip connector.
References Cited (Backward Citations)
US4001822A
Cited
US4075632A
Cited
US4360810A
Cited
US4816389A
Cited
US4786907A
Cited
US4782345A
Cited
EP0294963A2
Cited
US4835377A
Cited
US4864158A
Cited
US4853705A
Cited
US4888591A
Cited
US4999636A
Cited
US5030807A
Cited
US5055659A
Cited
US5479160A
Cited
US5825329A
Cited
EP0646983A2
Cited
US5771021A
Cited
US5485520A
Cited
US5682296A
Cited
US5504485A
Cited
US5528222A
Cited
US5682143A
Cited
US5673037A
Cited
US5550547A
Cited
US5574470A
Cited
US5510795A
Cited
US5563583A
Cited
US5552778A
Cited
US5538803A
Cited
US5554974A
Cited
US5565847A
Cited
US5635693A
Cited
US5521601A
Cited
US5729697A
Cited
US5729201A
Cited
US5831532A
Cited
US5812065A
Cited
US5767789A
Cited
US5606323A
Cited
US5680106A
Cited
US5737710A
Cited
US5828693A
Cited
US5826328A
Cited
US5786626A
Cited
US5850187A
Cited
US5850181A
Cited
US5654693A
Cited
US5828318A
Cited
US5821859A
Cited
US5736929A
Cited
US5739754A
Cited
US5874902A
Cited
US5777561A
Cited
WO1998016070A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-08 | 2004-02-07 | 2004-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-08 | 2008-02-07 | 2008-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-08 | 2012-02-07 | 2012-08-08 | $7700.00 | Window Closed / Lapsed |