RF (Radio Frequency) base card embedded with multilayer wiring type film capacitor

Abstract

The invention discloses an RF (Radio Frequency) base card embedded with a multiplayer wiring type film capacitor. The base card comprises a multilayer wiring type film capacitor, an RF coil and a card substrate, wherein the multilayer wiring type film capacitor comprises a first plate electrode, a second plate electrode and an electric medium layer between the first plate electrode and the second plate electrode; the welding position or lead position of the first plate electrode is coplanar with the welding position or lead position of the second plate electrode; the multilayer wiring type film capacitor is embedded into the card substrate; the RF coil is embedded into the card substrate by adopting an ultrasonic winding way; one end of the RF coil is connected with either plate electrode of the multilayer wiring type film capacitor, and the other end of the RF coil is connected with the other plate electrode of the multilayer wiring type film capacitor. The film capacitor is small in thickness, the base card is high in flatness, the film capacitor is reliably connected with the RF coil, and the base card is particularly applied to a coupled dual-interface IC (Integrated Circuit) card.

Description

technical field [0001] The invention relates to the technical field of integrated circuits and information interaction, in particular to an RF base card embedded with multilayer wiring film capacitors. Background technique [0002] For a dual-interface IC card integrating contact and non-contact, because its shape is consistent with that of a contact IC card, it has a carrying electrode diaphragm and its metal contacts that meet international standards. The internal structure of the dual-interface IC card is similar to that of the non-contact IC card. The antenna in the card base is connected to the chip to form an RFID (Radio Frequency Identification, radio frequency identification) module. within 10cm) to access the chip by radio frequency. Dual-interface IC card combines the advantages of contact IC card and non-contact IC card, and has wide applicability. [0003] A base card with an RF (Radio Frequency, wireless radio frequency) circuit is an important component of a ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to provide an RF base card with embedded multilayer wiring type film capacitors, to solve the problem of uneven surface after base card packaging in the base card manufacturing dual-interface IC card in the prior art. The technical problem of unreliable and poor stability of the connection between the coil and the pin capacitor

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