Abstract: The present disclosure provides a strengthened glass and a glass strengthening method, and an electronic device housing. Two opposing sides of the strengthened glass have surface compressive stress layers, and a third stress layer is sandwiched between the two surface compressive stress layers. The third stress layer includes a compressive stress region and multiple tensile stress regions spaced apart within the compressive stress region, the multiple tensile stress regions are extended in a thickness direction of the strengthened glass, and each of the tensile stress regions is surrounded by the compressive stress region. A sum of thicknesses of the surface compressive stress layers and a thickness of the compressive stress region located between two adjacent tensile stress regions is equal to a thickness of the strengthened glass.

Abstract: The present disclosure provides a metal-resin composite and a preparation method. The metal-resin composite includes a metal substrate; a porous resin layer formed on the metal substrate; a plastic layer formed on the porous resin layer; and a pore passage. The pore passage passes through the porous resin layer and extends inside the metal substrate, and the plastic layer fills in the pore passage to bond with the metal substrate.

Abstract: The present disclosure provides a metal-resin composite and a preparation method. The metal-resin composite includes a metal substrate; a porous resin layer formed on the metal substrate; a plastic layer formed on the porous resin layer; and a pore passage. The pore passage passes through the porous resin layer and extends inside the metal substrate, and the plastic layer fills in the pore passage to bond with the metal substrate.