Method of manufacturing magnetoresistive element
AssigneeTDK Corporation
InventorsTakumi YANAGISAWA, Masaru HIROSE, Shunji SARUKI
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Abstract
The method according to the present invention includes the steps of: sequentially applying a plurality of different voltages to an MR element and sequentially detecting output signals from the MR element; and eliminating the MR element as a defective product when an evaluation value, based on a difference of SN ratios of the output signals from the MR element respectively obtained for each applied voltage, is less than a threshold value, and selecting the MR element as a non-defective product when the evaluation value is greater than or equal to the threshold value.
Claims6
A method of manufacturing a magnetic device, comprising the steps of:
- (a) sequentially applying a plurality of different voltages to an MR element and sequentially detecting output signals from the MR element, and
- (b) eliminating the MR element as a defective product when at least one evaluation value based on a difference of SN ratios of the output signals from the MR element respectively obtained for each applied voltage, is less than a first threshold value, and selecting the MR element as a non-defective product when the at least one evaluation value is greater than or equal to the first threshold value.
An inspection device for an MR element comprising:
- detection means for sequentially applying a plurality of different voltages to the MR element and sequentially detecting output signals from the MR element;
- and
- calculation means for determining the MR element to be a defective product when an evaluation value, based on a difference of SN ratios of the output signals from the MR element respectively obtained for each applied voltage which are detected by the detection means, is less than a first threshold value, and determining the MR element to be a non-defective product when the evaluation value is greater than or equal to the first threshold value.
Dependencies are inferred from the claim text.