Invention Grant
US07675795B2 Semiconductor device, wireless chip, IC card, IC tag, transponder, bill, securities, passport, electronic apparatus, bag, and garment
有权
半导体器件，无线芯片，IC卡，IC标签，应答器，票据，证券，护照，电子设备，袋子和服装
- Patent Title: Semiconductor device, wireless chip, IC card, IC tag, transponder, bill, securities, passport, electronic apparatus, bag, and garment
- Patent Title (中): 半导体器件，无线芯片，IC卡，IC标签，应答器，票据，证券，护照，电子设备，袋子和服装
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Application No.: US10591275Application Date: 2005-03-09
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Publication No.: US07675795B2Publication Date: 2010-03-09
- Inventor: Jun Koyama
- Applicant: Jun Koyama
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2004-068450 20040311
- International Application: PCT/JP2005/004584 WO 20050309
- International Announcement: WO2005/088532 WO 20050922
- Main IPC: G11C7/00
- IPC: G11C7/00
Abstract:
The invention provides an ID chip to which data can be written only once in order to maintain high security as a non-contact type ID chip to which signals are inputted wirelessly from an antenna. A non-contact type ID chip includes a nonvolatile FeRAM in the chip. Data representative of whether data is written or not to the FeRAM is written when writing identification data, thereby data cannot be written additionally to the FeRAM of the ID chip once the data has been written.
Public/Granted literature
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