AOS Semiconductor Product Reliability Report AOTF240L, rev B Plastic Encapsulated Device ALPHA & OMEGA Semiconductor, Inc www.aosmd.com 1 This AOS product reliability report summarizes the qualification result for AOTF240L. Accelerated environmental tests are performed on a specific sample size, and then followed by electrical test at end point. Review of final electrical test result confirms that AOTF240L passes AOS quality and reliability requirements. The released product will be categorized by the process family and be routine monitored for continuously improving the product quality. Table of Contents: I. II. III. IV. Product Description Package and Die information Reliability Stress Test Summary and Results Reliability Evaluation I. Product Description: The AOTF240L uses Trench MOSFET technology that is uniquely optimized to provide the most efficient high frequency switching performance. Power losses are minimized due to an extremely low combination of RDS(ON) and Crss. Details refer to the datasheet. II. Die / Package Information: Process Package Type Lead Frame Die Attach Bonding Mold Material Moisture Level AOTF240L Standard sub-micron 40V N-Channel MOSFET TO220F Bare Cu Soft solder Al wire Epoxy resin with silica filler Up to Level 1 2 III. Reliability Stress Test Summary and Results Test Item Test Condition Time Point Total Sample size* Number of Failures Reference Standard MSL Precondition 168hr 85°c/85%RH + 3 cycle reflow@260°c (MSL 1) - 3003 pcs 0 JESD22-A113 HTGB Temp = 150°c , Vgs=100% of Vgsmax 168 / 500 / 1000 hours 616 pcs 0 JESD22-A108 HTRB Temp = 150°c , Vds=80% of Vdsmax 168 / 500 / 1000 hours 616 pcs 0 JESD22-A108 HAST 130 °c , 85%RH, 33.3 psi, Vds = 80% of Vdsmax before arcing (typically ≤42V) 96 hours 924 pcs 0 JESD22-A110 Pressure Pot 121°c , 29.7psi, RH=100% 96 hours 924 pcs 0 JESD22-A102 Temperature Cycle -65°c to 150°c , air to air, 250 / 500 cycles 1155 pcs 0 JESD22-A104 *Note: The reliability data presents total of available generic data up to the published date. IV. Reliability Evaluation FIT rate (per billion): 4.73 MTTF = 24115 years The presentation of FIT rate for the individual product reliability is restricted by the actual burn-in sample size. Failure Rate Determination is based on JEDEC Standard JESD 85. FIT means one failure per billion hours. 2 9 Failure Rate = Chi x 10 / [2 (N) (H) (Af)] = 4.73 9 MTTF = 10 / FIT = 24115 years Chi²= Chi Squared Distribution, determined by the number of failures and confidence interval N = Total Number of units from burn-in tests H = Duration of burn-in testing Af = Acceleration Factor from Test to Use Conditions (Ea = 0.7eV and Tuse = 55°C) Acceleration Factor [Af] = Exp [Ea / k (1/Tj u – 1/Tj s)] Acceleration Factor ratio list: Af 55 deg C 70 deg C 85 deg C 100 deg C 115 deg C 130 deg C 150 deg C 259 87 32 13 5.64 2.59 1 Tj s = Stressed junction temperature in degree (Kelvin), K = C+273.16 Tj u =The use junction temperature in degree (Kelvin), K = C+273.16 k = Boltzmann’s constant, 8.617164 X 10-5eV / K 3