The free, online Highly Accelerated Thermal Shock test coupon generator has been upgraded, permitting English and Metric input; makes selecting the interconnect sequence of the test patterns a single step. Other additions include help rollovers and the ability to have a Web download link to the HATS Gerber file e-mailed. Is a methodology of accelerating thermal shock reliability testing of PCBs so that 1000 thermal shock cycles takes a few days. Tests 36 four-net coupons with continuous resistance monitoring. Provides 144 nets of resistance data per test run.