Samsung Asks UMC for More Display Chip Wafers, Gets Turned Down

Why the order was cancelled in the first place

Samsung had earlier expected limited growth in the smartphone market. It pointed to rising component prices caused by the memory chip shortage, along with global inflation pressure. On that basis, it withdrew a plan to have UMC make more than 10,000 DDI wafers.

The market then moved the other way. Smartphone sales exceeded forecasts, and demand for the Galaxy Z Fold8 and Flip8 series in particular left Samsung needing more display driver chips. The new request is read as an attempt to restore the volume it had cancelled.

UMC had little room to help. After Samsung cancelled its contract, the foundry filled that capacity with orders from other customers, whose production schedules are already fixed.

What it means

A DDI processes the signals it receives from the application processor and sets the brightness and color of each pixel. It is essential for driving OLED panels, so a shortage could affect finished smartphone production.

The episode points to tighter supply in the foundry market, especially in mature processes used for general-purpose chips. Some manufacturers have less spare capacity, and they are becoming selective about which orders to accept.

A South Korean semiconductor industry source said that rising foldable sales inevitably lift DDI demand, and that using several manufacturers to secure parts is a common strategy. The source added that major foundries are already devoting substantial capacity to committed volumes, so taking on extra orders outside existing contracts may be difficult.