Method and device for producing a metallic contact structure for making electrical contact with a photovoltaic solar cell

摘要

A method for producing a metallic contact structure for making electrical contact with a photovoltaic solar cell, wherein, in order to create the contact structure, a paste, which contains metal particles, is applied to a surface of a carrier substrate via at least one dispensing opening, wherein the dispensing opening and the carrier substrate are moved in relation to one another during the dispensing of the paste. The paste is circulated in a circulating region, and in each case a part of the paste is branched off out of the circulating region at a plurality of branching points and each branching point is assigned at least one dispensing opening, via which the paste branched off at the branching point is applied to the surface of the carrier substrate, wherein the paste flows through a flow path having a length of less than 1 cm in each case between being branched off out of the circulating region and being dispensed from the dispensing opening assigned to the branching point. A device for producing a metallic contact structure for making electrical contact with a photovoltaic solar cell is also provided.

主权项

1. A method for producing a metallic contact structure for electrically contacting a photovoltaic solar cell, comprising for generation of the contact structure applying a paste comprising metal particles via dispensing openings onto a surface of a carrier substrate, moving the dispensing openings and the carrier substrate in reference to each other during discharge of the paste, rotating the paste in a circulation region, respectively separating a portion of the paste at a plurality of branching points from the circulation region and each of the branching points is allocated to at least one of the dispensing openings, and applying the paste separated at the branching point on a surface of the carrier substrate, with the paste respectively flowing through a flow path with a length of less than 5 cm between the branching point out of the circulating region and a discharge point of the dispensing opening allocated to said branching point, wherein the rotation in the circulating region occurs by a movement back and forth in the circulating region.