Thin film coil head assembly with protective planarizing cocoon structure

摘要

A thin film head is disclosed which is miniaturized to fit within a reduced size window or circumferential slot in a rotary head assembly. The thin film head and window or slot can be made so small that undesired tape cupping into the window or slot is significantly reduced. The thin film head includes a substrate (100) of electrically insulative material. A substantially helical thin film coil structure (220) is situated atop the substrate. A magnetic core (256) extends through an axial region of the coil structure. An elevated, thin film magnetic gap structure is position atop the coil structure. The gap structure includes a first top pole member (350) and a second top pole member (360) which are respectively magnetically coupled to the first and second ends of the magnetic core. A gap region (355) is formed between the first top pole member and the second top pole member.