Patent ID: 7220296
Filing Date: 2007-05-22
Classification: C23C

Abstract:
1. An electroless plating bath optimized for producing a substantially void-free metal fill in an integrated circuit feature having a width of between 5 nm and 20 nm and an aspect ratio greater than 5 comprising: water; between 0.5 g/L and 50 g/L of a water-soluble copper-containing compound; between 0.02 g/L and 1.5 g/L of a catalyst reducing agent comprising glyoxylic acid; between 2.37 g/L and 29.7 g/L of a bulk reducing agent comprising glycolic acid; between 25 g/L and 100 g/L of a buffering agent; between 0.25 g/L and 5.0 g/L of a grain refining additive; between 0.02 g/L and 0.1 g/L of a bath stabilizing agent; and between 0.01 g/L and 0.5 g/L of a rate controlling additive.