Plural-coil non-contact IC card having pot cores and shielding w

Details Plural-coil non-contact IC card having pot cores and shielding w Plural-coil non-contact IC card having pot cores and shielding w

1990-11-27

1993-03-30

Shepperd, John W.

Registers

Coded record sensors

Particular sensor structure

235493, 336 83, 336 84C, G06K 1907, H01F 1502, H01F 1504

Patent

active

051986477

ABSTRACT:
In a non-contact IC card based on an electromagnetic induction system, N small thin-film coils formed by thin-film technology are arranged to perform N-bit parallel data transfer at an increased data transfer rate. Each thin-film coil may be constructed with a pot core to solve a problem relating to errors in positioning the card relative to a terminal unit and thereby improving the reliability of data transfer. Shielding walls may be provided between the adjacent thin-film coils to prevent interference therebetween. The N thin-film coils are integrally formed as a thin-film coil module.

REFERENCES:
patent: 4605844 (1986-08-01), Haggan
patent: 4650981 (1987-03-01), Foletta
patent: 4692604 (1987-09-01), Billings
patent: 4818853 (1989-04-01), Ohta et al.

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