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US 8,228,765 B2Granted
Optical disc
AssigneeMurata Manufacturing Co., Ltd.
InventorsYuya Dokai, Noboru Kato, Ikuhei Kimura
Life of this patent
Estimating the term…
Abstract
An optical disc includes an electromagnetic coupling module mounted therein. The electromagnetic coupling module includes a wireless IC chip and a feeder circuit substrate in which a feeder circuit including a resonant circuit having a predetermined resonant frequency is disposed. The electromagnetic coupling module is electromagnetically coupled to a reflective film defining a metal thin film of the optical disc, and the reflective film defines an antenna or radiation pattern of the electromagnetic coupling module.
Claims6
An optical disc comprising:
- a reflective film defined by a metal thin film;
- a wireless IC chip;
- and
- a feeder circuit including a conductor pattern connected to the wireless IC chip;
- wherein
- the conductor pattern is arranged to overlap a portion of the reflective film such that the conductor pattern is electromagnetically coupled with the reflective film;
- and
- the reflective film defines an antenna or a radiation pattern.
5 more elements
Dependencies are inferred from the claim text.