Electromagnetic wave source probing device and probing method with the probing device
AssigneeHitachi, Ltd.
InventorKouichi Uesaka
Life of this patent
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Abstract
A quite novel electromagnetic wave source probing device and a method with such a device in which the probing time can be shortened. Magnetic field to time characteristics generated from a subject to be measured are measured in a plurality of positions. Electric field to frequency characteristics generated from the subject to be measured are calculated by use of the plurality of measured magnetic field to time characteristics. Frequency components exceeding a predetermined electric field value are extracted in the calculated electric field to frequency characteristics. Positions where currents having the extracted frequency components exist in the subject to be measured are outputted.
Claims16
In a method for manufacturing a circuit board, wherein electromagnetic wave intensities generated from said circuit board are detected, the method comprising the steps of:
- measuring magnetic field to time characteristics of an electromagnetic wave generated from said circuit board at a plurality of positions;
- calculating electric field to frequency characteristics generated from said circuit board by use of said plurality of measured magnetic field to time characteristics;
- extracting a frequency component exceeding a predetermined electric field value in said calculated electric field to frequency characteristics;
- and
- specifying a position where a current having said extracted frequency component exists in said circuit board.
In a method for manufacturing a circuit board, wherein a countermeasure is taken against an electromagnetic wave generated from a circuit board based on information obtained by inspection of an electromagnetic wave generated from said circuit board, the method comprising the steps of:
- measuring magnetic field to time characteristics of an electromagnetic wave generated from a circuit board at a plurality of positions;
- calculating electric field to frequency characteristics generated from said circuit board by use of said plurality of measured magnetic field to time characteristics;
- extracting a frequency component exceeding a predetermined electric field value in said calculated electric field to frequency characteristics;
- and
- specifying a position where a current having said extracted frequency component exists in said circuit board.
A circuit board, manufactured by a method in which a countermeasure is taken against an electromagnetic wave generated from said circuit board being taken at a particular position, said method determining said particular position and comprising the steps of:
- measuring magnetic field to time characteristics of an electromagnetic wave generated from said circuit board at a plurality of positions;
- calculating electric field to frequency characteristics generated from said circuit board by use of said plurality of measured magnetic field to time characteristics;
- extracting a frequency component exceeding a predetermined electric field value in said calculated electric field to frequency characteristics;
- and
- specifying said particular position where a current having said extracted frequency component exists in said circuit board.
Dependencies are inferred from the claim text.