[특허]Hall sensor with high spatial resolution in two directions concurrently

Hall sensor with high spatial resolution in two directions concurrently 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G11B-005/37 H01L-029/82 G01R-033/06
출원번호	US-0479252 (1995-06-07)
발명자 / 주소	Brady Michael J. (Brewster NY) Krusin-Elbaum Lia (Dobbs Ferry NY) Masselink William T. (White Plains NY) Santhanam Padmanabhan (Croton-on-Hudson NY) Tamegai Tsuyoshi (Tokyo JPX)
출원인 / 주소	International Business Machines Corporation (Armonk NY 02)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

A magnetic sensor, memory, and magnetic imager has been described for sensing a magnetic field in two directions concurrently incorporating a bar of semiconductor material having a rectangular cross-section, electrodes for introducing current along the length of the semiconductor material, and electrodes positioned on respective corners of the rectangular cross-section at a common distance along the current path whereby the Hall voltage may be detected concurrently in two directions. The memory includes the above magnetic sensor plus a disk having a magnetic layer thereon for storing information, a positioner for moving the disk, a memory control circuit and a signal processor circuit. The magnetic imager includes a plurality of magnetic field sensors positioned in a one or two-dimensional array. The invention overcomes the problem of mapping magnetic fields with high spatial resolution with high magnetic sensitivity in two directions concurrently.

대표청구항 ▼

An apparatus for sensing a magnetic field in two directions concurrently comprising: a semi-insulating substrate of a first semiconductor material having an upper surface, first and second spaced apart conductive regions formed in said upper surface of said semi-insulating substrate, a layer of insulation formed on said upper surface of said semi-insulating substrate, said layer of insulation having a first opening therein between and above a portion of said first and second spaced apart conductive regions and exposing said upper surface of said semi-insulating substrate between said first and second conductive regions, a layer of material having an upper and lower surface having a semiconductor region and a semi-insulating region, said lower surface formed on said layer of insulation and in said first opening wherein said layer of material is said semi-insulating region on said layer of insulation and wherein said layer of material is said semiconductor region in and over said first opening, means for passing an electrical current through said semiconductor region of said layer of material in a direction transverse to an axis extending between said first and second conductive regions, a first electrode formed on said upper surface of said semiconductor region of said layer of material whereby at times said electrical current passes in said semiconductor region of said layer of material, the voltage between said first and second conductive regions is proportional to the magnitude of the magnetic field B passing orthogonal to said electrical current and to said axis extending between said first and second conductive regions and the voltage between one of said first and second conductive regions and said first electrode is proportional to the magnitude of the magnetic field B passing orthogonal to said electrical current and to the axis extending between said one of said first and second conductive regions and said first electrode.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Hall sensor with high spatial resolution in two directions concurrently 원문보기

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Hall sensor with high spatial resolution in two directions concurrently 원문보기

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이 특허를 인용한 특허 (20)

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