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Check system and survey instrument null of Uighur of thin film
Check system and survey instrument null of Uighur of thin film
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机译：薄膜维吾尔族检查系统及测量仪器
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摘要
PURPOSE:To execute the inspection with high reliability by calculating the mean value of a wiggle at every sector having a small range to divide a track into many portions, comparing this with a constant allowable value and deciding the propriety while a constant or sine wave external magnetic field is added to a thin film head. CONSTITUTION:An acceleration magnetic field head 13 is provided in the vicinity of a thin film head 1. For the head 13, one electromagnetic surface and the coil are provided in balance, and as the condition in which the influence is hardly given to the medium of a magnetic disk 2, an external magnetic field to fluctuate to the magnetic action part of the thin film head 1 with strength is added. While the external magnetic field is added, the measuring data by a wiggle measuring part 9 are digitized by an A/D converter 14, stored into a data memory 15 for a sector, transferred to a computer 5 timely and the mean value calculation and the quality of the thin film head 1 are decided. When the error is present at a testing signal read by a bit error detector 16 due to the defect of the magnetic disk 2, etc., the error signal is outputted and the measurement is stopped.
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