Thin thermally and chemically strengthened glass-based articles

A glass-based article comprising:

• a first surface and a second surface opposing the first surface defining a thickness (t);
• a first compressive stress (CS) region comprising a concentration of a first metal oxide that is both non-zero and varies along a portion of the thickness and a second metal oxide;
• and
• a second CS region comprising the second metal oxide and being substantially free of the first metal oxide of the first CS region, the second CS region extending from the first CS region to a depth of compression (DOC) of about 0.17·t or greater, as measured from the first surface,
• wherein the first surface is flat to 100 μm total indicator run-out (TIR) along any 50 mm or less profile of the first surface.

A consumer electronic product, comprising:

• a housing having a front surface, a back surface and side surfaces;
• electrical components provided at least partially internal to the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing;
• and
• a cover article provided at or over the front surface of the housing such that it is provided over the display, the cover glass-based article being thermally and chemically strengthened and including first surface and a second surface opposing the first surface defining a thickness (t), a first CS region comprising a concentration of a metal oxide that is both non-zero and varies along a portion of the thickness, and a second CS region being substantially free of the metal oxide of the first CS region, the second CS region extending from the first CS region to a DOC of about 0.17·t or greater, wherein the first surface is flat to 100 μm total indicator run-out (TIR) along any 50 mm or less profile of the first surface, and
• wherein the consumer electronic product is a mobile phone, portable media player, notebook computer or tablet computer.