What kind of materials is being used for Fighter jets glass shields? What kind of materials is being used for Fighter jets glass shields and is that different from what they use for commercial jets?
Today, the canopy is a multi-layer structure. In case of the F-16, it consists of three layers:


The innermost layer is 0.5 inch thick polycarbonate and drape-molded into the compound curvature shape.
The center layer is 0.05 inch polyurethane to bond the inner to the outer layer.
The outer layer is a 0.125 inch layer of acrylic (PMMA).


The canopy is bolted to a metal frame for assembly. Some canopy also use explosive cord on the outer layer to fracture the material shortly before the ejection seat fires.



F-16 canopy (picture source)

For less fast aircraft, a single layer of acrylic is sufficient. Funnily, the company which produces most of those canopies doesn't even have a page in Wikipedia. They use flat PMMA sheets and drape-mold them over a mandrel. The secret of their process is the grease they put on the mandrel so the acrylic flows easily into shape.