Patent ID: 8227331

Claim:
A method of providing solder material on a predetermined area on a substrate, comprising: providing a substrate; producing a confinement layer extending on a first area of a first surface of the substrate, the confinement layer comprising a confinement material, and wherein the confinement material is selected to repel a solder material; producing a wetting layer, extending on a second area, the wetting layer comprising a wetting material, the second area lying within the first area, wherein the wetting material is selected to attract the solder material, wherein the confinement layer is located between the wetting layer and the substrate, and wherein the confinement layer forms a track with a given width, while the wetting layer forms a track with a width smaller than the width of the confinement layer; depositing the solder material on a part of the wetting layer, wherein the solder material comprises indium; and reflowing the solder material until the wetting layer is covered with a layer of the solder material, wherein a repelling force between the confinement layer and the solder material prevents the solder material from leaving the wetting layer during the reflowing process.