Patent ID: 8383427

Claim:
A manufacturing method for semiconductor devices comprising the steps of: (a) forming a lower conductive layer for lower electrode above a semiconductor substrate; (b) forming a laminated structure for MTJ device obtained by laminating a first magnetic film, an insulating film, and a second magnetic film in this order over the lower conductive layer, the second magnetic film containing boron and the insulating film containing a noncrystalline material; (c) forming a first conductive layer for first protective film over the laminated structure, the first conductive layer containing a simple substance structure of crystalline ruthenium; (d) forming a second conductive layer for second protective film over the first conductive layer, the second conductive layer containing a simple substance structure of tantalum; (e) patterning the second conductive layer to form the second protective film; and (f) patterning the first conductive layer and the laminated structure using the second protective film as a mask to form the first protective film and the MTJ device.