Chip with protection function and method for producing same

A method for producing a chip, the method comprising:

• producing a stack by stacking green sheets composed of a ZnO one above another, the green sheets comprising a print with an electrode material;
• sintering the stack of green sheets thereby forming a varistor layer having a multilayered electrode structure;
• printing a metallization paste on a first and/or a second main surface of the varistor layer for defining external contacts and/or connection pads;
• printing a glass paste thereon in a structured manner such that areas provided for the external contacts and/or the connection pads remain uncovered;
• firing and sintering the metallization paste and the glass paste thereby producing a metallization and a structured glass layer, wherein the glass layer comprises, as main constituent, oxides of Si and/or Ge, B and K, which in total comprise at least 70% by weight of the constituents of the glass layer, and wherein the glass layer is substantially free of Al, Ga, Cr and Ti;
• and
• reinforcing electrolytically or electroless regions of the metallization which are provided for the external contacts and/or the connection pads and which are not covered by the glass layer.