Patent ID: 7810491

Claim:
A flat panel solar collector adapted to be evacuable and vacuum-tight, comprising: at least one absorber; at least one conduit which is at least partially thermally associated with said at least one absorber; a holding structure comprising a perimetric frame; at least one first transparent wall; the first transparent wall and the holding structure having a substantially flat overlapping area, the holding structure overlapping area comprising a metal; at least one side of the first transparent wall comprising at least partially at said overlapping area a metal coating comprising a copper layer and tin cover layer forming at least one metalized area on the transparent wall at an edge of the wall; and a first soft metal ribbon sealing a junction between the first transparent wall and the holding structure, said metal ribbon comprising at least one of the elements selected from the group consisting of copper and lead, and which is soldered to the holding structure overlapping area comprising said metal with a first soft soldered portion at an inside edge of the ribbon and to the metalized area of the first transparent wall at an opposite outside edge of the ribbon with a second soft soldered portion at said edge of the transparent wall.