Magnetic recording tape having magnetic layer indentations and manufacturing method thereof, and magnetic recording tape cartridge

A manufacturing method of a magnetic recording tape comprising:

• a transfer step of, while taking up, on a roll, a magnetic recording tape of a plural-layer structure including at least a magnetic layer and a backing layer, pressing projections, which are formed on a surface of the backing layer, against a surface of the magnetic layer, whereby indentations are formed in the magnetic layer,
• wherein the magnetic recording tape comprising:
• a plural-layer structure including at least a magnetic layer, wherein
• the tape has a total thickness of 5.6 μm or smaller, and includes a plurality of evenly formed indentations disposed in a surface of the magnetic layer,
• wherein the plurality of indentations includes a first plurality of indentations having a depth of 20% or greater and less than 50% of a thickness of the magnetic layer, and a number of the first plurality of indentations is 55 or more per 6,400 μm2 of a surface area of the magnetic layer, and
• wherein the plurality of indentations includes a second plurality of indentations having a depth of 15% or greater and less than 50% of the thickness of the magnetic layer, and a number of the second plurality of indentations is 100 or more per 6,400 μm2 of a surface area of the magnetic layer, and
• wherein the depth of the second plurality of indentations is less than the depth of the first plurality of indentations.