Patent ID: 7982461
Filing Date: 2011-07-19
Classification: B82Y,G01R,H01L

Abstract:
1. A manufacturing method of a magnetic sensor comprising the steps of: forming a free layer, a conductive layer, and a pin layer, which are sequentially laminated on a substrate, so as to form a giant magnetoresistive element, wherein a first magnetic layer, an Ru layer, a second magnetic layer, and an antiferromagnetic layer are sequentially laminated on the conductive layer so as to form the pin layer; and performing magnetization heat treatment for applying a magnetic field to the pin layer so as to fix its magnetization direction, wherein the first magnetic layer and the second magnetic layer are magnetized while maintaining magnetization directions thereof in an anti-parallel state of magnetization, and wherein the strength of the magnetic field is between 10 mT and 200 mT.