THIN-FILM MAGNETIC HEAD AND ITS PRODUCTION

• Main Authors: HASHIMOTO AKIRA, YAMASAKA MINORU
• Format: Patent
• Language: English
• Published: 29.05.1998
• Edition: 6
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

PROBLEM TO BE SOLVED: To provide a method which prevents the degradation in the insulation characteristic from slider substrate materials by the dragging of metallic films at the time of separating and cutting from an element array state and at the time of grooving. SOLUTION: When a grinding wheel 14 is turned clockwise in separating, cutting and working of rails by grooving, heads 2 are so arranged that overcoating films come to a left side and slider substrates come to a right side. The abrasive grains of the grinding wheel 14 run from the slider substrate material side to the overcoating film side when the heads are worked. Then, even if the dragging of the metallic films arise in the case of cutting and working of the metallic films in the overcoating films, these films do not extend to the slider substrate material side and the insulation characteristic is maintained. The insulation characteristic of the metallic films and slider substrate materials in the elements of the thin-film magnetic heads 2 is well maintained and, therefore, the degradation in the recording and reproducing outputs of magnetic signals is prevented.