Optics method and fixture for assembling and testing a magnetic head

摘要

A method for optically testing a magnetic head having a slider and a suspension includes the steps of separately mounting the slider and the suspension in a test fixture. The slider is mounted in a cage and positioned relative to the suspension. The slider and the suspension are then tacked temporarily in place with a suitable adhesive. The magnetic head is flown over a glass disk and is illuminated through the glass disk with either a monochromatic or a polychromatic light beam. The operator then views the magnetic head through the glass disk with a microscope and observes the resulting diffraction interference patterns, which include bright and dark or colored bands. The operator analyzes the alignment of these bands, determines the pitch and roll errors of the magnetic head, and repositions either the slider or the suspension to correct for these errors.