IC card
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United States of America Patent
Stats
-
May 27, 2008
Grant Date -
Aug 19, 2004
app pub date -
Dec 1, 2003
filing date -
Dec 2, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
To provide an IC card, which secures satisfied flatness of the card surface to achieve good printing properties on the card surface. An IC card has a core layer which includes a plurality of sheet materials wherein inner core sheets adjacent to an IC module have through holes formed in a region corresponding to the IC mounted portion, wherein a relationship A=(B1+C1).+-.30 .mu.m is satisfied, where A (.mu.m) represents the sum of heights of the through holes, B1 represents a projection height on an IC mounted surface of the IC module, and C1 represents a projection height on an IC non-mounted surface. By virtue of having this structure, the IC card can secure card flatness sufficient to obtain satisfied printing properties with respect to the rewrite sheet.
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