Abstract:
PROBLEM TO BE SOLVED: To provide a compact and low-cost current sensor.SOLUTION: A current sensor includes: a plastic package 7; a conductor 3 having a built-in first electric terminal 4 and second electric terminal 5, to which a current to be measured is supplied and discharged; third electric terminals 6; and a semiconductor chip 1 which has at least one magnetic field sensor 2 that reacts to a magnetic field component generated by a current that flows through the conductor 3 and runs vertically with respect to an active surface of the semiconductor chip 1. The first electric terminal 4 and second electric terminal 5 are arranged on a first side of the package 7, and the third electric terminals 6 are arranged on a side opposite to the first side of the package 7. The semiconductor chip 1 is mounted as a flip chip. The semiconductor chip 1 includes: first bumps 8 that are electrically connected with the third terminals 6; and second bumps 9 that are located on the conductor 3 and are electrically separated from the semiconductor chip 1 via an insulating layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a current sensor which can shield an external interference field effectively and can be attached in a simple manner.SOLUTION: A device for measuring a current flowing through an electric cable comprises a printed circuit board 2, a magnetic field sensor 3 and a ferromagnetic component 4. The ferromagnetic component 4 comprises two tongues 9A and 9B whose front faces 10 are disposed opposite of each other and are separated by an air gap and further comprises at least two feet 8, with the tongues 9A and 9B and/or the feet 8 being bent off. A cable 1 is guidable through an opening 13 which is enclosed by the ferromagnetic component 4. The ferromagnetic component 4 and the magnetic field sensor 3 are mounted on a surface 5 of the printed circuit board 2. The magnetic field sensor 3 is sensitive to a magnetic field extending in parallel to the surface 5 of the printed circuit board 2. The tongues 9A and 9B of the ferromagnetic component 4 extend in parallel to the surface 5 of the printed circuit board 2.
Abstract:
PROBLEM TO BE SOLVED: To provide a stress sensor for measuring mechanical stresses in a semiconductor chip, which compensates for sensitivity variations by a simple method.SOLUTION: A stress sensor has four integrated resistors Rto Rintegrally arranged on an operation surface 3 of a semiconductor chip 2. The integrated resistors Rto Rform a Wheatstone bridge, in which the resistors Rand Rarranged on one opposite sides are p-type resistors and the resistors Rand Rarranged on the other opposite sides are n-type resistors.
Abstract:
PROBLEM TO BE SOLVED: To provide a magnetic angle sensor having high sensitivity.SOLUTION: A magnetic angle sensor includes a semiconductor chip 6 and at least two flat-shaped magnetic field concentrating devices 7 and 8 arranged on a surface of the semiconductor chip 6. Four hall sensors 9, 10, 11 and 12 are integrated in the semiconductor chip 6, and the magnetic field concentrating devices 7 and 8 are arranged in respective end regions thereof. The hall sensors 9, 10, 11 and 12 are covered with lines of magnetic force in a magnetic field extending substantially perpendicular to the surface of the semiconductor chip 6 in the end regions of the magnetic field concentrating devices 7 and 8. The two hall sensors 9 and 11 form a first pair of sensors for measuring a first component of the magnetic field, while the other two hall sensors 10 and 12 form a second pair of sensors for measuring a second component of the magnetic field. A connecting line for connecting the hall sensors arranged in the end regions of the same magnetic field concentrating devices 7 and 8 forms a single common line 13.