Bendable glass stack assemblies, articles and methods of making the same

A method of making a stack assembly, comprising the steps:

• forming a glass element having a thickness from about 25 μm to about 125 μm, the glass element further comprising:
• (a) a first primary surface;
• (b) a second primary surface;
• and
• (c) a compressive stress region extending from the first primary surface of the glass element to a first depth in the glass element, the region defined by a compressive stress σI of at least about 700 MPa at the first primary surface of the glass element,
• wherein the glass element is characterized by:
• (a) a stress profile such that when the glass element is bent to a target bend radius of from 1 mm to 5 mm, with the center of curvature on the side of the second primary surface so as to induce a bending stress σB at the first primary surface, σI+σB<0;
• and
• (b) a puncture resistance of greater than about 1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 1.5 mm.