Shippable heat-treatable sputter coated article and zinc cathode sputtering target containing low amounts of tin

A method of making an automobile transparency comprising:

• applying a coating on a glass substrate having the following:
• a first dielectric layer over a glass substrate;
• a first infrared reflecting metal layer over the first dielectric film:
• a first metal primer layer over the first reflective layer;
• a second dielectric layer over the first metal primer layer;
• a second infrared reflective layer over the second dielectric layer;
• a second metal primer layer over the second infrared reflective layer;
• a protective film overlying the first zinc stannate film of the third dielectric layer, wherein at least one of the dielectric layers includes a first dielectric film selected from the group consisting of zinc oxide, tin oxide and a first zinc stannate film and a second dielectric film including a second zinc stannate film having a composition different than the first zinc stannate film and a composition of 10-90 weight percent zinc and 90-10 weight percent tin;
• processing the coated substrate to provide a coated windshield blank wherein the processing step includes heating the coated substrate to its bending temperature and after heating the coating has reduced haze;
• laminating the coated blank to another piece of glass to provide the automobile windshield.