📘 COHU INC (COHU) — Investment Overview

🧩 Business Model Overview

COHU supplies semiconductor test and burn-in infrastructure used to validate device performance and reliability before shipment. The value chain begins with semiconductor manufacturers and OSAT (outsourced semiconductor assembly and test) providers that need to screen parts for defects, measure electrical/functional performance, and confirm thermal endurance under stress conditions. COHU’s offerings sit in the workflow where reliability testing and test-handling interfaces matter—turning product-ready semiconductors into production-screened units by integrating hardware, controls, and customer-specific engineering into automated test environments.

The practical “how it works” is equipment qualification and integration: customers evaluate COHU systems for throughput, test coverage, thermal performance, uptime, and ease of sustaining operations over time. After acceptance, COHU typically benefits from the installed base through service, parts, and upgrades that support ongoing production needs.

💰 Revenue Streams & Monetisation Model

COHU’s monetization is primarily equipment-driven, supplemented by recurring aftermarket activities. Revenue streams typically include:

• System sales and upgrades: transactional revenue tied to customer capex cycles and new product ramps requiring additional test capacity.
• Aftermarket service and parts: maintenance, repairs, and replacement components that support uptime and extend equipment life.
• Component-level sales tied to the installed base: recurring demand can emerge as customers reorder parts for continued production and as production formats evolve.

Margin drivers are tied to (1) system mix and configuration complexity, (2) manufacturing execution and component sourcing, and (3) the share of aftermarket revenue, which generally carries stronger gross margin characteristics than initial system sales.

🧠 Competitive Advantages & Market Positioning

COHU’s moat is best characterized as switching costs and process know-how, reinforced by intangible credibility from qualification and service track record.

• Switching costs (qualification + integration): Semiconductor reliability test systems require validation, integration into existing factory workflows, and production acceptance. Replacing qualified systems involves engineering effort, downtime, and performance risk—making customers reluctant to change vendors without clear economic or technical advantages.
• Installed base service economics: Once deployed, operational dependence on maintenance, spare parts, and support creates ongoing revenue opportunities and strengthens long-term relationships.
• Reliability and throughput engineering: Test-handling and thermal/burn-in use cases demand stable operation and accurate measurement under stress, where accumulated engineering experience can translate into fewer production disruptions and better yield outcomes.

COMPETITIVE BENCHMARKING (primary competitors)

• Teradyne: A leading provider of automated test equipment (ATE) platforms. Teradyne competes more directly for broad test system footprints, while COHU’s emphasis tends to concentrate on reliability testing and test-handling solutions that integrate into customers’ broader test architectures.
• Advantest: Also a major ATE incumbent. Advantest’s focus spans high-volume test platforms; COHU typically competes in adjacent infrastructure segments where test-handling reliability and thermal validation are critical.
• FormFactor: Primarily known for probe cards and wafer test interface technologies. While FormFactor’s overlap occurs earlier in the electrical testing chain, customers evaluating complete test workflows often consider the same constraints around manufacturability, uptime, and sustaining performance—creating indirect competitive tension.

Overall, COHU differentiates by targeting the reliability-screening and test-handling interface that supports production yield and product endurance, rather than competing as a general-purpose ATE platform provider.

🚀 Multi-Year Growth Drivers

Over a 5–10 year horizon, COHU’s opportunity is tied to enduring drivers that increase the need for higher-throughput, more reliable screening across a growing and more complex semiconductor end-market:

• AI and high-performance compute drive semiconductor complexity: More advanced memory and compute architectures increase demand for effective reliability screening and production test throughput.
• Reliability standards become harder to meet: As devices scale and operating conditions tighten, burn-in and stress testing remain essential to reduce field failures.
• Advanced packaging and heterogeneous integration: Chiplets, stacked memory, and other packaging approaches tend to expand test complexity, requiring equipment that can sustain stable throughput and thermal performance while supporting evolving device formats.
• OSAT/production capacity expansion in electronics manufacturing: Growth in outsourced assembly and test capacity increases the total installed base of test infrastructure and sustains aftermarket service demand.
• Lifecycle sustaining demand: Even when equipment is originally purchased during ramp-up periods, ongoing production and product refreshes support parts and service intensity.

⚠ Risk Factors to Monitor

• Semiconductor capex cyclicality: System purchases remain sensitive to memory and broader semiconductor spending cycles; demand can soften when manufacturers reduce investment.
• Technological substitution risk: Shifts in device architecture, packaging, or test methodology may require redesigns to maintain fit-for-purpose performance and reliability outcomes.
• Customer concentration and specification risk: Large customers can drive qualification timelines and specification changes, affecting backlog conversion and product mix.
• Competitive pricing and installed-base leverage: Incumbents and system integrators may pressure pricing if customers standardize around preferred platforms or vendors.
• Supply chain and component availability: Semiconductor equipment manufacturing depends on timely access to specialized components; disruptions can impact delivery schedules and service responsiveness.
• Export controls and trade restrictions: Cross-border technology and equipment sales can face regulatory constraints that affect market access and product availability.

📊 Valuation & Market View

Market valuation for semiconductor test and automation suppliers typically reflects a blend of (1) cyclical visibility into customer capex, (2) aftermarket/service contribution, and (3) confidence in sustaining installed-base demand through product transitions. Investors commonly evaluate this sector using metrics such as EV/EBITDA and price-to-sales, with sentiment increasingly influenced by:

• Aftermarket/service durability and parts replacement behavior
• Order conversion tied to new product ramps
• Gross margin resilience through component and mix changes
• Evidence of qualification wins in higher-complexity device generations

🔍 Investment Takeaway

COHU presents an evergreen investment case rooted in switching costs from qualification and integration, an installed-base service engine, and engineering credibility in reliability-focused test infrastructure. The multi-year demand backdrop—driven by AI-related semiconductor complexity, advanced packaging, and sustained reliability screening needs—supports a structural role for COHU’s niche in semiconductor test workflows. Key diligence focus should center on qualification momentum, aftermarket/service mix, and adaptability to evolving device and packaging test requirements.

⚠ AI-generated — informational only. Validate using filings before investing.