Modeling Multi Tiered Yield Variances across Alternative Semiconductor Fabrication Facilities for Industrial Processors
Industrial processor margins depend on adjusting fab allocation for parametric bin shift rather than wafer cost alone.
Thermal Leakage Binning
Meaning
A chip sorting process categorizes manufactured semiconductor dies into different performance and power brackets based on their static power dissipation at elevated temperatures. Utilizing thermal leakage binning allows semiconductor manufacturers to separate high-leakage, high-performance parts from more efficient, cooler-running devices. This categorization ensures that chips are matched with their ideal applications and marketed at prices that reflect their specific performance profiles.
Sorting Mechanism
Testing equipment measures the electrical current drawn by each die while the chip is kept at a high test temperature. The thermal leakage binning process assigns each die to a specific bin according to the leakage current recorded, with lower-leakage chips being reserved for mobile devices and high-leakage chips going to high-performance servers. This sorting prevents chips from being placed in systems where they would overheat or consume too much power.
If a chip exhibits leakage above a certain threshold, it is placed in a lower-frequency bin or discarded.
Margin Protection
Manufacturers can increase their average selling price by selling premium, low-leakage chips at higher prices to customers who require low power consumption. Because thermal leakage binning extracts high-value parts from a standard manufacturing run, it helps designers offset the lower margins of standard chips. This pricing strategy increases the total revenue generated from a single wafer and improves the profitability of the product line.
Supply Consistency
Distribution channels must have a steady supply of chips across all performance bins to fulfill their customer orders and meet market demand. When manufacturing variations cause a shift in the distribution of leakage bins, the supply of specific chip grades can become unstable. This instability requires that manufacturers work with their distribution partners to manage inventory levels and adjust product availability in response to active binning results.