Method for reducing bow in laminate structures

A method for making a laminate structure, comprising:

• positioning an interlayer between a first glass substrate having a thickness of between 3 mm to 10 mm;
• and a second glass substrate having a thickness of 0.3 mm to not greater than 2 mm to form a stack,
• wherein the interlayer has a Young's modulus of greater than or equal to 15 MPa to not greater than or equal to 250 MPa;
• is chosen from polyvinyl butyral, ethylene-vinyl acetate, thermoplastic polyurethane, and ionomers,
• wherein a coefficient of thermal expansion of the first substrate is higher than a coefficient of thermal expansion of the second substrate;
• heating the stack to a lamination temperature ranging from wherein the lamination temperature ranges from 120° C. to 160° C. to form a laminate structure;
• and
• subjecting the laminate structure to at least one thermal cycle, the thermal cycle comprising:
• cooling the laminate structure to a first temperature ranging from −20° C. to 35° C.
• holding the laminate structure at the first temperature for a first time period ranging from 30 minutes to 4 hours,
• heating the laminate structure at a ramp rate ranging 0.1° C./min to 2° C./min to a second temperature below the lamination temperature, the second temperature ranging from 50° C. to 120° C.,
• holding the laminate structure at the second temperature for a second time period ranging from 30 minutes to 4 hours;
• wherein, via the thermal cycle, an asymmetrical laminate having a radius of that is greater than the maximum dimension of the laminate structure.