Weak SiC Demand Pressures Amtech's SFS Segment, but Foundry Expansion and Recurring Revenues Provide Support

What happened

A Zacks article highlights that weak silicon carbide (SiC) demand is weighing on Amtech Systems' Semiconductor Fabrication Solutions (SFS) business, though the company's foundry expansion and growing recurring consumables revenue are expected to support a recovery. The DeepValue report maintains a BUY stance, emphasizing the cyclical nature of the business and asymmetric upside from AI/HPC advanced packaging and the SiC 6-to-8-inch transition, backed by net cash and a fab-lite model. Despite the near-term SiC headwind, Thermal Processing Solutions orders are rising year-over-year with a $21.2 million backlog, and gross margins improved to 47% in Q2 FY2025 from 36% in FY2024, signaling operating leverage. However, the article underscores that SiC demand weakness is a tangible risk, potentially delaying the SFS segment's recovery if EV adoption and SiC capacity adds falter. Overall, the news reinforces existing risks without altering the core investment thesis, as foundry expansion and consumables growth are expected to offset cyclical softness.

Implication

Investors should weigh the SiC headwind against the broader recovery story. The BUY thesis relies on consumables growth and Thermal segment strength to smooth volatility, while the SiC 6-to-8-inch transition offers a long-term catalyst. However, if SiC weakness persists beyond one to two quarters or leads to extended shipment delays, the margin of safety narrows. Position sizing is key given cyclicality and customer concentration. Hold conviction if Thermal orders continue to convert and gross margins sustain above 40%; any deterioration in these metrics would warrant a more cautious stance.

Thesis delta

The news adds a near-term negative catalyst (weak SiC demand) that pressures the SFS segment, but the overall thesis remains BUY due to offsetting factors: strong Thermal orders, improving margins, and net cash. The delta is a heightened awareness of SiC-related risk, but no shift in stance—risks were already flagged in the report. Conviction is maintained as long as Thermal orders and consumables growth persist; a prolonged SiC downturn could increase downside risk.