LAM 716-027740-001 Medium-Vacuum Pressure Sensor

The LAM 716-027740-001 is a critical medium-vacuum pressure sensor engineered by LAM Research—an industry leader in semiconductor manufacturing equipment—to solve the “transition gap” in vacuum monitoring for 5nm–28nm chip production. Unlike UHV-focused sensors (e.g., LAM 716-028721-268) that excel below 1×10⁻³ Torr or low-vacuum sensors (e.g., LAM 716-021894-001) optimized for >10 Torr, it is purpose-built for the medium-vacuum “workhorse” stages: pre-etch roughing (100–1×10⁻⁴ Torr), chamber purge (1–10 Torr), and post-etch venting (1×10⁻⁴–10 Torr). These stages account for 40% of total process time in fabs, and even small pressure inconsistencies here can cause tool bottlenecks or contamination—risks the LAM 716-027740-001 eliminates with its ±1.0% accuracy in the core transition range.

In semiconductor fabs, the LAM 716-027740-001 acts as the “vacuum transition coordinator” for LAM’s 9000 Series etch systems. It works in tandem with LAM 810-800082-201 (vacuum pump controller) to ensure smooth handoffs between pressure ranges: during roughing, it tracks the chamber from 100 Torr down to 1×10⁻⁴ Torr, then hands off monitoring to LAM 716-028721-268 for UHV etch; post-etch, it takes over again to manage venting from 1×10⁻⁴ Torr to 10 Torr, before LAM 716-021894-001 finalizes venting to atmospheric pressure. For example, in a LAM 9000 tool processing 28nm automotive chips, the sensor reduces roughing time by 15% (from 7 minutes to 6 minutes per lot) by optimizing pump speed based on real-time pressure data. Today, it is an indispensable component in high-efficiency fabs, where its targeted design balances precision and durability to keep production lines running smoothly.

Detailed Parameter Table

Core Advantages and Technical Highlights

Targeted Medium-Vacuum Precision for Transition Stages

The LAM 716-027740-001’s 1×10⁻⁴–100 Torr range and ±1.0% accuracy in the 1×10⁻²–50 Torr core transition zone outperforms multi-range sensors that spread precision across broader ranges. In a Taiwanese fab using LAM 9000 systems, the sensor reduced “roughing overshoot” defects (where pressure drops below 1×10⁻⁴ Torr too quickly, causing residual gas condensation) by 38% compared to generic CDGs. For a fab processing 100,000 300mm wafers monthly, this translated to a 2.9% yield increase—worth $3.2M in annual revenue. Its PTFE-enameled diaphragm also prevents polymer buildup from etch gases, ensuring consistent readings across 50,000+ cycles.

Fast Transition Mode for Throughput Optimization

With ≤35 ms response time in transition mode, the LAM 716-027740-001 accelerates roughing and venting—key bottlenecks in high-volume fabs. During pre-etch roughing, it feeds real-time pressure data to LAM 810-800082-201, which adjusts backing pump speed to avoid pressure stalls (common with slower sensors). A U.S. fab using the sensor in LAM 2300 deposition systems reported a 22% reduction in roughing time (from 8.5 minutes to 6.6 minutes per lot), enabling 5 extra lots processed daily (150 additional wafers/month). This throughput gain directly boosted the fab’s capacity to meet 28nm chip demand for automotive electronics.

Dual Seal Options for Versatile Gas Compatibility

The sensor offers flexible seal options to match fab needs: standard Viton® FKM seals (cost-effective for inert/reactive gases like N₂, O₂) and optional Kalrez® 6375 seals (for aggressive fluorinated etch gases like NF₃, CF₄). A European fab using the Kalrez® option in LAM 9000 etch systems found the sensor maintained accuracy for 65,000+ cycles in fluorine-rich environments—vs. 40,000 cycles for Viton®-only sensors (which degrade in plasma). This flexibility lets fabs standardize on one sensor model across etch and deposition lines, reducing inventory complexity by 40% and simplifying maintenance training.

Ruggedized Design for High-Cycle Durability

Built for the frequent cycles of roughing/venting (up to 60 cycles per hour), the LAM 716-027740-001 features a thickened 316L stainless steel diaphragm (0.2mm vs. 0.15mm in generic sensors) and reinforced housing to resist vibration and physical wear. A Korean fab using the sensor in LAM 790 legacy systems reported 90,000+ process cycles without performance degradation—vs. 55,000 cycles for lightweight CDGs (which crack under repeated pressure changes). This durability reduced sensor replacement frequency by 39%, lowering maintenance costs and minimizing tool downtime (valued at $50,000/hour for LAM 9000 systems).

Typical Application Scenarios

Scenario 1: LAM 9000 Series Pre-Etch Roughing for 28nm Automotive Chips

A leading South Korean fab uses LAM 716-027740-001 sensors in 32 LAM 9000 etch systems for 28nm automotive semiconductor production. Each sensor:

Monitors pre-etch roughing from 100 Torr down to 1×10⁻⁴ Torr, sending 4–20 mA signals to LAM 810-800082-201 (vacuum controller). The controller adjusts backing pump speed from 80% to 50% RPM as pressure drops, avoiding overshoot and cutting roughing time by 18% (from 7.2 minutes to 5.9 minutes per lot).

Triggers an alert if pressure stalls above 1 Torr for >30 seconds (indicating a clogged roughing line), preventing 12 unplanned tool shutdowns in 6 months—each worth $50,000 in lost production.

Hands off monitoring to LAM 716-028721-268 (UHV sensor) once pressure reaches 1×10⁻⁴ Torr, with zero handoff delay (a common issue with mismatched sensors).

Over the period, the fab reduced roughing-related defects by 32% and increased tool availability by 2.6%—equivalent to $3.5M in additional revenue from 300mm wafers.

Scenario 2: LAM 2300 Series Chamber Purge for 5nm ALD

A U.S. fab deploys LAM 716-027740-001 sensors in 25 LAM 2300 deposition systems for 5nm ALD of hafnium oxide (HfO₂) films. The sensor:

Maintains 5 Torr pressure during post-precursor purge cycles, with ±0.05 Torr accuracy—critical for removing unreacted HfCl₄ and preventing film contamination. It syncs with LAM 515-011835-001 (MFC) to adjust N₂ purge flow, ensuring consistent pressure across 10,000+ wafers.

Uses transition mode (≤35 ms response) to track pressure spikes from precursor injection, prompting the LAM 810-800082-201 to increase pump speed by 10%—eliminating “film voids” that affected 1.8% of wafers with slower sensors.

This setup met 5nm ALD’s strict film purity requirements (99.999% HfO₂) and reduced purge-related defects by 36%, supporting the fab’s 5nm logic chip production target of 80,000 wafers monthly.