Examination apparatus for biological sample and chemical sample

Abstract

A wireless sensor chip suitable for the compact, high-sensitive, and low-cost examination apparatus for easily examining a biological material such as gene at low cost is provided. A sensor chip is formed on an SOI substrate, and an n type semiconductor layer on which a pMOS transistor is formed and a p type semiconductor layer on which an nMOS transistor is formed are isolated by a pn junction. Therefore, the p type semiconductor layer at the outermost portion (chip edge portion to be in contact with solution) is set to floating, and the maximum potential and the minimum potential of the chip are supplied to an n type semiconductor layer and a p type semiconductor layer inside the outermost portion, respectively. Also, the chip is covered with an ion impermeable insulating film for reducing the penetration of positive ions through the oxide layer.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] The present application claims priority from Japanese Patent Application JP 2004-012596 filed on Jan. 21, 2004, the content of which is hereby incorporated by reference into this application. TECHNICAL FIELD OF THE INVENTION [0002] The present invention relates to a sensor and a system, in which the sensor is put into or comes into contact with a sample and results thereof are transmitted wirelessly to an external device. As the examples of the system mentioned above, a system for detecting biological materials such as nucleic acid, protein, antigen, and antibody and a system for measuring physical and chemical quantity such as temperature, pressure, light, and ion concentration can be shown. BACKGROUND OF THE INVENTION [0003] Japanese Patent Laid-Open Application No. 2002-14072 discloses an integrated circuit device called an integrated sensor device, in which a sensor portion, a control unit for processing the signals representing the ...

AI Technical Summary

Benefits of technology

[0006] Starting with the gene test and the protein test, the system capable of easily measuring biological and chemical materials has been demanded in various fields. In order to meet such demands, the inventors of the present invention examine the wireless sensor chip (hereinafter, referred to as sensor chip) in which a sensor for measuring a biological material such as DNA, a chemical material, ion, and physical quantity and a mechanism for wirelessly transmitting the sensing data to the outside of a chip are integrated on a semiconductor chip. Japanese Patent Laid-Open Application No. 2002-14072 does not describe what type of device the integrated sensor device can be. Especially, it is desired that the device can be manufactured simply by the current semiconductor manufacturing process so as to realize the measurement system at low cost.

Problems solved by technology

Also, the problem that the device characteristics and the electric insulation between devices are degraded due to the penetration of positive ions into the device forming region in a semiconductor integrated circuit device with the SOI structure is examined in Japanese Patent Laid-Open Application No. 6-177233, Japanese Patent Laid-Open Application No. 6-177242.

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