| 摘要 |
PROBLEM TO BE SOLVED: To reduce damage in the vicinity of a tape end surface to increase durability by forming a projecting part in the slit end surface of a tape cross direction while setting a full thickness to a specified value or lower. SOLUTION: A magnetic layer 7 and a protective layer 8 are sequentially stacked in the upper surface of a high polymer film, a back coat 9 is formed in its lower surface, and a projecting part 11 is formed so as to be extended to overlap and be spaced from both slit end surfaces 10 of the high polymer film 6 of a tape cross direction. The full width of a magnetic recording tape composed of the high polymer film 6, the protective layer 7 and the back coat 9 is set equal to or lower than 8μm. By the spring effect of the projecting part formed in the slit end surface, the upper and lower direction regulating force of a magnetic recording tape traveling system applied to the slit end surface is reduced and thus, the occurrence of one-side extension of a tape end surface as the slit end surface is prevented without any damage to the magnetic layer in the vicinity of the slit end surface or fracturing of the magnetic layer into powders to cause the increase of dropout.
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