In 1977 Professor Iwasaki wrote his first paper on perpendicular magnetic recording (“An Analysis of the Magnetization Mode for High Density Magnetic Recording,” IEEE Trans. Magn., MAG-13 ...

For any given line in 3D, there's an infinite family of lines that are perpendicular to it, namely all the lines that lie in the plane for which the line is the normal of.<BR><BR>The second ...

Perpendicular (Vertical) Recording The magnetic flux coming out of the write pole (P2) affects the vertical bit directly below. It goes down to the soft underlayer and back up the return pole (P1).