Patent ID: 8584354

Claim:
A method for making an interposer panel for an electronic assembly, the method comprising: forming a plurality of through-vias in a glass substrate core; and inducing a first layer of compressive stress, a second layer of compressive stress, and a plurality of intermediate zones of compressive stress in the glass substrate core, wherein: the first layer of compressive stress extends from a first surface of the glass substrate core into a thickness T of glass substrate core to a first depth of layer D 1 ; the second layer of compressive stress extends from a second surface of the glass substrate core into a thickness T of the glass substrate core to a second depth of layer D 2 and is spaced apart from the first layer of compressive stress; and a sidewall of each through-via of the plurality of through-vias is surrounded by one of the plurality of intermediate zones of compressive stress, wherein each intermediate zone of compressive stress of the plurality of intermediate zones of compressive stress extends from the first layer of compressive stress to the second layer of compressive stress adjacent to the sidewall of each through-via.