SURFACE MOUNT CAPACITOR USED AS A SUBSTRATE FLIP-CHIP CARRIER IN A RADIO FREQUENCY IDENTIFICATION TAG
First Claim
1. A transponder, comprising:
- a capacitor having at least two terminals, where circuit traces are formed on at least one surface of the capacitor and connect to the terminals;
an integrated circuit mounted to a surface of the capacitor and including a plurality of contacts connected to the circuit traces formed on the capacitor; and
an antenna coil including two antenna leads that are connected at contact points to the circuit traces formed on the capacitor;
wherein the circuit traces connect at least two of the terminals of the capacitor to at least two of the contacts of the integrated circuit;
wherein the circuit traces connect the two antenna leads to at least two of the contacts of the integrated circuit; and
wherein the integrated circuit includes circuitry capable of generating an identification code signal in response to receipt of an activation signal by via the antenna coil.
1 Assignment
0 Petitions
Accused Products
Abstract
In a passive radio frequency identification (RFID) transponder comprising an integrated circuit, an antenna coil, and at least one surface mount capacitor, a configuration is disclosed in which the surface mount capacitor is used as the integrated circuit carrier. The integrated circuit comprises a bumped die flip-chip, and the surface mount capacitor substrate has electrically conductive contacts and connections for electrically joining the antenna coil, capacitor, and integrated circuit. Transponders in accordance with embodiments of the invention do not include an intermediate substrate carrier onto which the capacitor and integrated circuit are mounted and interconnected, and to which the antenna coil is subsequently attached.
-
Citations
18 Claims
-
1. A transponder, comprising:
-
a capacitor having at least two terminals, where circuit traces are formed on at least one surface of the capacitor and connect to the terminals; an integrated circuit mounted to a surface of the capacitor and including a plurality of contacts connected to the circuit traces formed on the capacitor; and an antenna coil including two antenna leads that are connected at contact points to the circuit traces formed on the capacitor; wherein the circuit traces connect at least two of the terminals of the capacitor to at least two of the contacts of the integrated circuit; wherein the circuit traces connect the two antenna leads to at least two of the contacts of the integrated circuit; and wherein the integrated circuit includes circuitry capable of generating an identification code signal in response to receipt of an activation signal by via the antenna coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of manufacturing a transponder assembly, comprising:
-
forming circuit traces on a ceramic surface of a capacitor; aligning an integrated circuit including contacts with respect to the circuit traces formed on the ceramic surface; and mounting the integrated circuit to the ceramic surface of the capacitor. - View Dependent Claims (13, 14, 15, 16)
-
-
17. A method of manufacturing a transponder comprising:
-
forming circuit traces on a ceramic surface of a capacitor; aligning an integrated circuit including contacts with respect to the circuit traces formed on the ceramic surface; mounting the integrated circuit to the ceramic surface of the capacitor; and connecting antenna leads at contact points to the circuit traces formed on the surface of the capacitor. - View Dependent Claims (18)
-
Specification