REDUCED TEMPERATURE ELECTROPLATING OF NiFe ALLOYS
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Historically the amount of Fe in an electrodeposited NiFe film has been increased by increasing the Fe+2 concentration in the bath solution until the desired alloy is achieved. This approach has resulted in stability problems with the magnetic properties, grain size and bath efficiency. Using a standard plating solution at a normal plating temperature of 25ŒC, an electroplated film was created having 48% Fe. Using a refrigeration unit to cool the plating solution to 18ŒC, the same solution was used to electroplate a film with 66% Fe having good magnetic properties and good grain size. Successive runs conducted while the solution was maintained at 20ŒC uniformly produced films with Fe concentrations exceeding 60%, even when the bath stood idle for as many as 19 days between runs.