COMPOSITIONS AND METHODS FOR THE ELECTROLESS DEPOSITION OF NiFe ON A WORK PIECE

WIPO Patent Application WO2005048275

A3

Methods and compositions are provided for the electroless deposition of NiFe on a work piece (30). A deposition solution for use in electroless deposition of NiFe on a work piece (30) is formed from a nickel ion source, a ferrous iron source, a complexing agent, a reducing agent, and a pH reducing agent. The deposition solution is substantially free from alkali metal ions. A method for fabricating a flux concentrating system for use in a magnetoelectronics device begins by providing a work piece (30) and forming an insulating material layer (34) overlying the work piece (30). A trench (36) is formed in an insulating layer (34) and a barrier layer (40) is deposited within the trench (36). A NiFe cladding (46) layer is deposited overlying the barrier layer (40). After depositing the NiFe cladding layer (46), the insulating material layer (34) proximate to the trench has a concentration of alkali metal ions less than about 1 x 10