Non-contact communication medium and recording medium cartridge

Patent metadata

Field	Value
Publication number	US-11562197-B2
Application number	US-201917046071-A
Country	US
Kind code	B2
Filing date	Mar 28, 2019
Priority date	Apr 9, 2018
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A non-contact communication medium according to an embodiment of the present technology is a non-contact communication medium for a recording medium cartridge, including: a circuit component; a support substrate; and an antenna coil. The circuit component has a memory unit capable of storing management information relating to the recording medium cartridge therein. The support substrate supports the circuit component. The antenna coil includes a coil unit that is electrically connected to the circuit component and formed on the support substrate, an inductance value of the coil unit being 0.3 μH or more and 2.0 μH or less.

First claim

The invention claimed is:

1. A non-contact communication medium for a recording medium cartridge, comprising:
a circuit component that has a memory unit capable of storing management information relating to the recording medium cartridge therein;
a support substrate that supports the circuit component; and
an antenna coil that includes a coil unit that is electrically connected to the circuit component and formed on the support substrate, wherein the circuit component is provided within an inner loop of the coil unit, and the coil unit is configured to provide electrical power to the circuit component,
wherein the coil unit has a single coil structure with a maximum outer diameter in a major axis direction equal to 20 mm or less and a maximum outer diameter in a minor axis direction equal to 10 mm or less and the coil unit with the single coil structure has an inductance value from 0.3 μH to 0.7 μH.

2. The non-contact communication medium according to claim 1 , wherein
a Q-value of the antenna coil is 30 or more.

3. The non-contact communication medium according to claim 1 , wherein
the antenna coil is made of a copper foil having an average thickness of 16 μm or more.

4. The non-contact communication medium according to claim 1 , wherein
the memory unit includes a non-volatile memory element having a memory capacitance of 16 kilobytes or more.

5. The non-contact communication medium according to claim 1 , wherein
the circuit component further has a resonant capacitance unit that is electrically connected to the antenna coil and has a variable capacitance value therein.

6. A recording medium cartridge, comprising:
an information recording medium;
a cartridge case that houses the information recording medium; and
a non-contact communication medium that includes
a circuit component that has a memory unit capable of storing management information relating to the information recording medium therein,
a support substrate that supports the circuit component, and
an antenna coil that includes a coil unit that is electrically connected to the circuit component and formed on the support substrate, wherein the circuit component is provided within an inner loop of the coil unit, and the coil unit is configured to provide electrical power to the circuit component,

wherein the coil unit has a single coil structure with a maximum outer diameter in a major axis direction equal to 20 mm or less and a maximum outer diameter in a minor axis direction equal to 10 mm or less and the coil unit with the single coil structure has an inductance value from 0.3 μH to 0.7 μH.

7. The recording medium cartridge according to claim 6 , wherein the information recording medium is a magnetic tape.

8. The recording medium cartridge according to claim 7 , wherein
the information recording medium is a magnetic tape cartridge of an LTO (linear tape open) standard.

Assignees

• Sony Corp

Inventors

• Nakano Hiroaki
• Nakashio Eiji
• Anno Kazuo
• Iwama Takanobu
• Tochikubo Shinya
• Adachi Naohiro
• Abe Masayoshi
• Omae Uichiro

Classifications

• G06K19/07783 Primary

  the coil being planar · CPC title

• G11B23/107

  using one reel or core, one end of the record carrier coming out of the magazine or cassette · CPC title

• H02J50/10

  using inductive coupling · CPC title

• H01Q7/00

  Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop · CPC title

• G11B23/042

  Auxiliary features (sensing such features G11B15/06) · CPC title