IST - TH is an innovative and proven PCB reliability test system. IST relies on a patented coupon design. Coupons are specially designed with inbuilt heater and test traces, the coupon takes into account the areas of the actual board under test which are most susceptible to early failure. The benefits of adopting IST for reliability test are savings of time and increased ability to analyze the PCB at the point of failure. All this is delivered in an economic, environmentally sound way with significant economies over traditional oven or Liquid / liquid shock methods.