Thermal shock testing has long been the accepted method to check the reliability of plated-through holes and solder joint connections. Historically, thermal shock testing has been performed utilizing either dual chamber air-to-air systems or liquid-to-liquid systems. Both of these methods offer significant disadvantages in cost, time, and the fact that the samples must be transported between the hot and cold environments. Transportation of the samples between the temperature environments makes monitoring the resistance of the samples difficult and inaccurate due to the length and quantity of wires. The infrequent monitoring typically associated with traditional thermal shock methods also makes detection of “glitch” conditions marginal at best.
HATS™ Plated-through Hole Reliability Testing Technology has been recognized and utilized since 2003. The HATS™ system was developed to emulate traditional air-to-air test methods, while significantly reducing the drawbacks of traditional methods. The test uses a single chamber in which high volume hot and cold air pass stationary samples. The high volume air flow provides rapid thermal transfer to the device-under-test (DUT), and reduces the time for the DUT to reach temperature equilibrium. This greatly reduces the time required for each cycle, and the stationary samples easily configured to a high-speed precision resistance sampling network. The HATS™ test systems meets the test parameters of MIL-STD-202; Method 107 and IPC-TM-650; Test Method 2.6.7 for thermal shock and continuity for printed boards.
The HATS™ system has a maximum and minimum temperature capability of 160°C and -55°C, respectively. With a complete chamber load of 36 0.62-inch thick coupons, the system has a temperature transition rate of 26°C per minute. The system acquires precision resistance data from the test coupons.
The HATS™ tester performs 1000 cycles of 36 coupons/144 nets in less than a week.
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In addition to providing HATS test services, NTS also has a full-sized reflow oven for "true to life” reflow simulations and has the capabilities to perform post-HATS testing failure analysis. Contact us today to discuss your HATS testing program.