The viscosity behavior and formability of the Au49Ag5.5Pd2.3Cu26.9Si16.3 bulk metallic glass within the supercooled liquid temperature region are examined using thermomechanical analyzer (TMA). The viscosity values of the Au-based BMG within 440-470 K lies within 2 x 10(7) and 1 x 10(8) Pas, a reasonable viscosity level for macro- or micro-forming. The low working temperature of similar to 450 K and the low working pressure less than 1 MPa, coupled with the sufficient hardness of similar to 350 H-v, stress level of similar to 1100 MPa, and anti-oxidation and anti-corrosion capability, would be highly promising for micro-forming or micro-imprinting for the micro-electro-mechanical systems. (C) 2009 Elsevier B.V. All rights reserved.