The Finer Structure of Magnetic Tape: Features at High Magnification of Oxide Coatings and Bases
Surface features of magnetic oxide coatings have been studied. However, high-power microscopy of tape has not been published. Utilizing microtome tissue techniques, sections in three planes of 1/4- magnetic tape were prepared at 2 to 4 micra (80 to 160 microinches). Kodachrome photomicrographs under polarized and other lighting, up to 1500 magnification, reveal the internal structure and defects in the oxide coating. Principal internal defects were pinholes, foreign bodies and oxide particle aggregates. The orientation of oxide particles along the tape axis was visualized at 1500 magnification. Section profiles of coatings confirm prior studies of surface smoothness. Homogeneity and smoothness of polyester and acetate bases are demonstrated. Kodachrome photomicrographs.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.