Patent ID: 7300562

Claim:
A method for depositing a platinum-metal alloy onto a surface of a microelectronic workpiece, the method comprising the steps of: contacting the surface of the workpiece with an acidic bath comprising species of platinum to be deposited on the surface of the microelectronic workpiece, species of a second metal selected from nickel, cobalt, lead, and tin to be deposited on the surface of the microelectronic workpiece, and an acid, pH of the acidic bath ranging from about 0.5 to 3.0; providing an anode spaced from the surface of the microelectronic workpiece in contact with the acidic bath; applying electroplating power between the surface of the microelectronic workpiece and the anode; and depositing the platinum and the second metal onto the surface of the microelectronic workpiece, the amount of platinum deposited by weight being greater than the amount of the second metal deposited by weight.