Thermal, electrical, mechanical analysis and validation of new package TLA developed by UTAC

IC packaging solution with high reliability, low cost, Hi-density I/O and high thermal, electrical and mechanical performance is critical to keep up with the trend of smaller footprint and better performance of IC die. UTAC´s evolutionary leadless package, the TLA™ (Thermal Leadless Array), the next generation in leadframe packaging was subjected to comprehensive thermal, electrical, mechanical analysis according to industrial standards. TLA utilizes the best aspects of UTAC´s developed LPCC™/QFN and TAPP® technology. This new technology achieves up to 75% reduction (compared to QFP package) in board area as well as dramatically reducing total signal and wire lengths. At a lower cost per I/O than traditional wire bonded packages, the TLA has the highest I/O count per body size in a lead frame based package. The TLA is able to replace QFPs, BGAs, large body and dual Row QFNs, QFPs, FPBGAs, MCM and SiP. This paper presents the detailed thermal, electrical and mechanical analysis and experimental results of the UTAC´s TLA. The author states the overview of the analysis methodology in the introduction. It is then followed by detailed explanation of analysis and results in all rounded aspect including thermal, electrical and mechanical. The TLA overall performance is generally better or comparable to the targeted predecessor TLLGA+. It also passed the board level reliability test in accordance to JEDEC standards and the internal qualifications are currently in good progress.