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TSMC Is Holding $1 Billion of Apple A20 Pro Wafers Over DRAM Shortage

A shortage of high‑performance mobile DRAM is delaying TSMC’s wafer‑level packaging and risks limiting early iPhone supply.

Overview

  • TSMC’s front‑end production for Apple’s A20 Pro on the N2 node is reported to be healthy with good yields, but roughly $1 billion of completed dies are waiting for memory before packaging can proceed.
  • The new Wafer‑Level Multi‑Chip Module (WMCM) process requires DRAM to be bonded at the wafer stage, so delayed DRAM shipments directly block A20 Pro completion.
  • Apple is negotiating with its main DRAM suppliers—Micron, SK Hynix and Samsung—has explored Chinese maker CXMT, and may pay premiums to speed deliveries.
  • Contract assemblers including BYD and Foxconn face reduced time to build inventory ahead of launch, which could make some models scarce in the opening weeks.
  • Rising bids from AI and datacenter customers for LPDDR5X and other fast memory are tightening mobile DRAM availability and are the main market pressure behind the packaging bottleneck.