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AssigneeTDK Corporation
InventorsHiroshi Shindo, Akio Ogawa, Kazushige Tohta
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The present invention is an object to provide an apparatus or a method making it possible to easily effect connection between additional electrodes, etc. and lead electrodes when performing a processing for achieving a predetermined throat height value or crown processing or the like and making it possible to measure the requisite lapping amount. For achieving the object, a flexible electrode extension sheet is used which consists of a portion for retaining a ceramic bar in which element portions are formed and a portion where there are formed wirings respectively in correspondence with the elements and adapted to be connected to these elements, in which these wirings, which can be easily connected to an external measurement system, are electrically connected to the elements, whereby the lapping amount is easily obtained from the characteristic amount of the elements in the lapping process.
An electrode extension sheet for use in a lapping apparatus which performs lapping on an object to be lapped which is elongated in one direction, in which a plurality of elements consisting of at least one of electromagnetic conversion elements and magneto-electric conversion elements are formed in the length direction, or in which a plurality of said elements and additional electrodes whose characteristics vary according to the lapping amount are formed in the length direction, by applying a load to the object to be lapped according to the positions where the elements are formed and by imparting a minute deformation to the object to be lapped to thereby effect lapping,
A lapping method for performing lapping on an object to be lapped which is elongated in one direction, in which a plurality of elements consisting of at least one of electro-magnetic conversion elements and magneto-electric conversion elements are formed in the length direction, or in which a plurality of said elements and additional electrodes whose characteristics vary according to the lapping amount are formed in the length direction,
Dependencies are inferred from the claim text.