Voltage breakdown device for solar cells

A method of fabricating a solar cell, the method comprising:

• forming a plurality of alternating N-type and P-type semiconductor regions in or above a semiconductor substrate;
• forming an anti-reflective coating (ARC) layer over the plurality of alternating N-type and P-type semiconductor regions;
• forming an opening through the ARC layer to expose a portion of one of the plurality of alternating N-type and P-type semiconductor regions;
• forming a doped semiconductor layer over the ARC layer, a portion of the doped semiconductor layer formed in the opening;
• forming a plurality of openings through the doped semiconductor layer and the ARC layer to expose portions of each of the plurality of alternating N-type and P-type semiconductor regions;
• forming a plurality of conductive contacts in the plurality of openings, wherein one of the plurality of conductive contacts is formed in one of the plurality of openings and on the portion of the doped semiconductor layer in the opening;
• and patterning the doped semiconductor layer to isolate the portion of the doped semiconductor layer in the opening.