Patent ID: 8134112

Claim:
A method of fabricating an insulated glazing unit having controllable radiation transmittance, said method comprising: providing a first glazing pane; coating a conductive material onto a given surface of the first glazing pane to form a conductive layer, thereby forming a fixed position electrode; laminating a dielectric material atop the conductive layer to form a dielectric layer; providing a layered structure that includes a polymer layer and a further conductive layer; holding a first edge of the layered structure onto a mandrel, the first edge of the layered structure extending along substantially the entire width of the first glazing pane and being held to the mandrel along a length of its shaft, the layered structure thereby wrapping around the mandrel; heating the layered structure to a temperature at which the polymer layer of the layered structure shrinks and causes the layered structure to form a variable position electrode in the form of a tightly coiled spiral roll around the mandrel; affixing an outer edge of the variable position electrode along a width thereof onto the dielectric layer; removing the mandrel from the layered structure; and attaching the first glazing pane and a second glazing pane to a spacer at their peripheries such that the given surface of the first glazing pane and a given surface of the second glazing pane face each other and are spaced apart from each other, the variable position electrode being disposed between the first glazing pane and the second glazing pane.