One of the most popular micro features for transferring heat from electronic devices is the microchannel. This investigation involves a parametric study of the straight channels fabricated on commercially available copper using wire electrical discharge machining process. Copper is a preferred material for heat sink applications due to its less manufacturing price and strong thermal properties, which play an important role in heat transmission. In this work, a tool electrode of 250 µm diameter brass wire is employed to fabricate the 1 mm deep channel. Process parameters considered for parametric study are pulse on time, pulse off time, and peak current. Channel width, channel depth, and material removal rate are determined as response parameters irrespective of each experimental run. The minimum width and maximum depth of the fabricated channel are obtained as 340.24 μm and 1078.53 μm, respectively.