Method for manufacturing magnetic memory chip device

摘要

A method for manufacturing a magnetic memory chip device comprises the steps of: writing information in each of a plurality of magnetic memory chips formed on a silicon wafer; adhering a high magnetic permeability plate on a back face of the silicon wafer after writing information, the high magnetic permeability plate having a higher magnetic permeability than silicon and having a thickness of 50 μm or more; dicing the silicon wafer into respective magnetic memory chips after adhering the high magnetic permeability plate.