This year sees the continuation of the persistent chip shortage, which entails a shortage of production capacity for not only 12-inch wafers fabricated with mature process technologies but also 8-inch wafers in particular. The shortage of 8-inch wafer production capacity initially began gestating in 2H19, owing to emerging demand from structural changes in the semiconductor industry, with 5G smartphones and PMICs used in new energy vehicles as two examples of such demand. At the same time, the consumption of semiconductor production capacity has also increased multiplicatively in recent years as a result of the aforementioned structural changes. TrendForce expects demand for semiconductor capacity from emerging applications to continue rising in the coming years.
In response to this emerging demand, foundries such as TSMC, UMC, and SMIC are currently expanding their investment in mature process technologies. TrendForce expects the industry’s total 8-inch wafer capacity to grow at a 3-5% CAGR from 2019 to 2023, while 12-inch wafer capacity is expected to grow at an 11-13% CAGR across the same period. It should be pointed out that production capacities allocated to the 0.18-0.11µm process nodes（for 8-inch wafer fabrication） and 55nm-12nm nodes（for 12-inch wafer fabrication）represent the most severe shortage among all process nodes. Hence, certain foundries are expected to gradually install additional production capacities for mature process technologies in 2H22-1H23. These installations will likely help address the ongoing chip shortage.
In addition, several foundries are focusing on expanding their 28nm manufacturing capacity, primarily because transistor architecture below the 20nm node requires a transition to FinFET architecture, which is relatively costly. The 28nm node represents the sweet spot in terms of cost/benefit and is widely used for manufacturing such mainstream products as notebook Wi-Fi chips, smartphone OLED driver ICs, automotive MCUs, and image signal processors. Furthermore, chips used for IoT applications, including smart home appliances and set-top boxes, as well as other products currently manufactured at the 40nm node will likely be migrated to 28nm manufacturing, meaning the demand for 28nm capacity will continue to grow going forward.