As terminal devices take on increasingly complex Edge AI computing workloads, the internal assembly of mobile communications is facing technological bottlenecks akin to those in supercomputers and data centers. Meeting the power delivery, rigorous thermal management, and high-frequency interconnect demands of high-performance chips within severely constrained physical spaces is now an industry-wide challenge.
With the explosive growth in mobile SoC processing power, thermal density inside devices has sharply increased. Borrowing advanced cooling methodologies like Direct-to-Chip (DTC) from the HPC sector, we introduce highly conductive solder or sinter-based Thermal Interface Materials (sTIM) to mobile devices. These materials offer exceptionally low thermal resistance (Rth) and high isotropic thermal conductivity, rapidly dissipating heat from bare dies to vapor chambers in compact smartphone chassis. Furthermore, their high compliance absorbs thermomechanical strain caused by Coefficient of Thermal Expansion (CTE) mismatches, ensuring devices don't throttle under sustained heavy workloads.
To support 5G high-frequency data transmission and Edge AI throughput, the line width and spacing (L/S) on High-Density Interconnect (HDI) PCBs for smartphones are being pushed toward 25/25 µm and below. For ultraminiature components like 01005 and 008004, we pair advanced Direct Metallization (DM) technology with modified Semi-Additive Processing (mSAP). This vastly reduces interfacial defects and enables highly reliable microvia filling, completely eliminating assembly defects such as wicking and solder balling at ultra-fine pitches.
While pushing the limits of performance, Alpha solutions remain committed to environmental sustainability. Our low-temperature lead-free solders can drastically lower reflow temperatures to 175°C. This prevents the thermal warping of ultra-thin HDIs and flexible printed circuits (FPCs) while simultaneously cutting EMS energy consumption by over 30% per production run. Additionally, our no-clean flux systems maintain extremely high Surface Insulation Resistance (SIR), protecting components while eliminating the water waste associated with post-reflow cleaning, building a green interconnect foundation for mass mobile device manufacturing.
The Junjun Tech engineering team will provide you with targeted sample testing and highly reliable process guidance to help you overcome demanding manufacturing challenges.