Patent ID: 6423567
Filing Date: 2002-07-23
Classification: H01L,Y02E,Y02P

Abstract:
A process for fabricating contact structures in solar cells, which have at least one first layer or first sequence of layers over a second layer comprising:positioning an etching mask on said at least one first layer or first sequence of layers, with said etching mask determining the contact structures; etching indentations through said at least one first layer or first sequence of layers at sites prescribed by said etching mask down to or into said second layer lying therebelow in such a manner that said etching mask is undercut; and introducing an electrically conductive material into said indentations, with said etching mask forming a shadow mask for introducing said electrically conductive material and said conductive material being introduced only in such a manner that no contact occurs between said conductive material and said at least one first layer or first sequence of layers; wherein said positioning of said etching mask occurs by laying or clamping said mask over said at least one first layer or first sequence of layers, with said etching mask being removed after said introducing of said electrically conductive material into said indentations.