| 摘要 |
PURPOSE:To prevent the over-etching of a foundation layer by dividing the larger window part into sections having the length equal to the width of the smaller window part and therefore eliminating the ecthing speed difference between both window parts. CONSTITUTION:A connecting window part 7 having a larger size is divided into plural window parts 7a having the same width as that of a connection window 6 of the smallest size. Thus the etching speed difference is eliminated between both parts 6 and 7. An equal etching speed secured between both parts 6 and 7 prevents a case wiring patterns (4a, 4b) serving as the foundation layers opposite to the parts 6 and 7 are over-etched and therefore these patterns are thinned or have the film break. In this way, a thin film magnetic head having a high grade of quality is obtained. |
