Patent ID: 7268971
Filing Date: 2007-09-11
Classification: G11B

Abstract:
1. A magnetic head apparatus comprising: a magnetic head main body including an outward path recording magnetic head device and an inward path recording magnetic head device for carrying out at least magnetic recording to form recording tracks on an outward path and an inward path of the outward and inward transport of a metal evaporated type magnetic tape along the longitudinal direction of said metal evaporated type magnetic tape while said metal evaporated magnetic tape is transported in the outward and inward direction and vice versa along the longitudinal direction, wherein said recording magnetic head device is composed of opposing first and second magnetic bodies, said opposing first and second magnetic bodies having an operation magnetic gap formed between their front portions, said operation magnetic gap has an asymmetric structure in which a width of said front portion of said second magnetic body is selected to be narrower than that of said front portion of said first magnetic body, a track width of said operation magnetic gap being determined by a width of the front portion of said magnetic body, and said outward path recording magnetic head device and said inward path recording magnetic head device are located in such a manner that said second magnetic body having said front portion with the narrow width is located on the leading side with respect to the direction of the outward path and the inward path of said metal evaporated type magnetic tape.