Patent ID: 6532647
Filing Date: 2003-03-18
Classification: G11B,Y10T

Abstract:
A manufacturing method of a composite type thin-film magnetic head with a reading head element and an inductive writing head element, said method comprising the steps of:forming said reading head element and lead conductor layers on a first insulation layer which is formed on a first shield layer, said lead conductor layers being connected to said reading head element and wherein each of said lead conductor layers is formed from a group consisting of a multi-layered structure of a tantalum layer, a copper layer and a tantalum layer or a single layer structure of a copper layer or a single layer structure of a gold layer; forming a second insulation layer to cover said reading head element and said lead conductor layers; forming a second shield layer on said second insulation layer; forming a third insulation layer over said second shield layer and exposed second insulation layer to make magnetic gap between magnetic poles of said inductive writing head element; and forming via holes used for externally connecting said lead conductor layers and a back gap hole used for connecting the magnetic poles of said inductive writing head element at their back sides, said via holes and back gap hole forming being executed by simultaneous reactive ion etching using a fluorine gas as an etching gas for completely removing said second insulation layer and said third insulation layer located at said via holes and said third insulation layer located at said back gap hole, wherein said back gap hole is formed in a region over said second shield layer, and wherein said via holes are formed in a region over said lead conductor layers so as to use lead conductor layers as etching stop layers of the reactive ion etching.