Schedule for this course

This class provides an in-depth look into how data is written and stored on magnetic media. Students will leave this class with a solid understanding of the parameters and issues important in high-density magnetic recording. The course will walk through the process and tradeoffs, step by step, of designing a write head. Many design examples and the modeling results of real designs will be presented. Students will learn the reality behind the many popular misconceptions, such as why the overwrite test doesn't really measure overwrite, and why the fifth harmonic test doesn't really measure NLTS.

The class is ideal for engineers working in head/media and read/write areas. It is also an excellent source of information for engineers from the industry seeking to understand the total picture. Students should have a basic understanding of magnetic recording before taking this class. KnowledgeTek's Disk Drive Technology class is excellent preparation.
 

Magnetic Recording Review Read Channel Basics Sources of Error Inter Symbol Interference (ISI) Magnetism and Magnetic Materials Dipoles B, H, and M Field M-H Loop Susceptibility and Permeability Ferromagnetism Domains Hysteresis Loop Anisotropy Media Media Structure Real Hysteresis Loops S, S*, and SFD Isotropic vs Anisotropic Media Models Demag Fields Source of Demag Magnetic Charge Method of Images The S Curve Demag Limited Transitions Writing Head Fields Karlquist Field Model Write Field Gradient Writing Process Transition Magnetization Williams and Comstock Model

Write Heads Basic Design Write Field Gradient Pole-Tip Saturation Apex and Back-Gap Saturation Design Optimization Real Head Performance Transitions and Overwrite Dynamic Write Process Transition Formation Resultant Transition Shape Media Grain History Transition Shape Contributors Easy and Hard Transitions Overwrite Non-Linear Write Effects Transition Shift Partial Erasure Demag Time Shift Imaging Reduction Saturation Effects Precompensation Fifth Harmonic Tests Timing Consequences Rise Time Electrical Effects Magnetic Effects Klaassen Theory Eddy Currents Magnetic Losses Yoke Switching Model Gap Field Switching

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Dates	Days	Location	Price
Available thru KnowledgeTek		(On-Site presentations)

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