Patent ID: 6684171
Filing Date: 2004-01-27
Classification: G11B

Abstract:
A method for enhancing calibration of magneto resistive (MR) elements formed on a wafer during manufacture of said elements, said method comprising:collecting via a plurality of ELEs and ELGs a high frequency sampling of data related to element resistance and stripe height of said MR element during an ongoing lapping operation, wherein said plurality of ELEs are positioned in alternating kerfs between a long and a short ELG to provide more accurate resistance data sensors, such that said ELGS are not wire-bonded to MR sensors; analyzing said data to determine accurate relationship characteristics between stripe height and resistance of said MR element; providing a result of said analysis to a calibration component utilized to control lapping parameters and adjustment of lapping dimensions; and dynamically controlling said lapping operation on said MR element utilizing said results with MR sensor component, which includes said ELEs, to make adjustments to said lapping dimensions, while the lapping operating is ongoing.