Data carriers having an integrated circuit unit

Details Data carriers having an integrated circuit unit Data carriers having an integrated circuit unit

1995-10-31

1997-12-30

Hajec, Donald T.

Registers

Records

Conductive

235488, G06K 1902, G06K 1906

Patent

active

057033501

ABSTRACT:
Integrated circuits embedded in cards are known in the industry as "Smart Cards". The present invention discloses a novel design for housing an integrated circuit(IC) within a card unit. The integrated circuit is first made thin and placed in the midplane of the card. This lessens the tensile stress in the IC when the Smart Card is subjected to bending. In addition, it is suggested that the IC chip is then placed in a relatively long and wide enclosure. This second measure reduces the stress on the IC by compromising between the competing objectives of making a rigid cavity for IC protection, versus making a more compliant cavity for overall card strength. Lastly, the cavity is made out of a material that typically has a Young's modulus that is higher than the Young's modulus of the card but lower than Young's modulus of the integrated circuit. This once again increases Smart Card reliability by utilizing a harder cavity material to protect the IC.

REFERENCES:
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patent: 4460825 (1984-07-01), Haghiri-Tehrani et al.
patent: 4463971 (1984-08-01), Hoppe et al.
patent: 4841134 (1989-06-01), Hida et al.
patent: 4897534 (1990-01-01), Haghira-Tehrani
patent: 4994659 (1991-02-01), Yabe et al.
patent: 5057679 (1991-10-01), Audic et al.
patent: 5208450 (1993-05-01), Uenishi et al.

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