Name: LAM 853-150806-001 Optical Emission Spectrometer Module, Plasma Endpoint Detection Sensor for Etch Chamber - MASSIVE
Brand: AMAT

Description

LAM 853-150806-001 Optical Emission Spectrometer Module, Plasma Endpoint Detection Sensor for Etch Chamber

Product Description

The 853-150806-001 is a compact optical emission spectrometer (OES) module developed for LAM Research plasma etch platforms. It captures the characteristic optical spectrum emitted by plasma within the processing chamber, and transmits spectral data to the tool host controller for real-time endpoint detection. The module identifies the moment when the target thin film has been fully etched, triggering recipe transition to stop the etch process and prevent over-etching. Equipped with integrated optical fiber interface, high-sensitivity CMOS detector and onboard signal processing circuit, it is conformal-coated for cleanroom and plasma byproduct resistance. It is a critical field-replaceable spare for LAM Kiyo / 2300 Flex etch systems, directly impacting wafer uniformity and yield control.

Technical Parameters

Item	Specification
Manufacturer	LAM Research
Model	853-150806-001
Function	Optical Emission Spectrometer (OES), Plasma Endpoint Monitoring
Detector	High-sensitivity CMOS spectral sensor
Wavelength Range	200–800 nm UV-Vis spectrum
Optical Interface	Fiber-coupled, compatible with chamber viewport fiber harness
Power Supply	24 VDC auxiliary cleanroom supply
Power Consumption	Max 9 W
Data Interface	Proprietary internal tool bus / serial communication
PCB Protection	Conformal coating against trace corrosive gas and humidity
Operating Temperature	15 ℃ ~ 60 ℃
Humidity	10–85% RH, non-condensing
Compliance	SEMI S2, cleanroom class 1 compatible
Weight	Approx. 0.32 kg
Diagnostics	Fiber loss check, detector dark noise, communication fault alarm

Recommended Related Models (8 units)

853-150806-R001: Updated revision spectrometer module with improved dark noise performance
810-070142-001: OES host interface PCB for chamber endpoint signal acquisition
853-014567-001: Chamber optical viewport and fiber feedthrough assembly
810-102361-222: Rocker valve interface board (paired chamber control spare)
853-045976-001: Rocker valve actuator with Hall position sensor
810-114278-001: RF match control board for ICP plasma source
853-120410-001: Alternative high-speed OES variant for high-rate etch recipes
LAM Endpoint Recipe Software: Host tool application for spectral trace setup and threshold tuning

LAM 853-150806-001

Compatibility & Installation Traps

Compatibility

Primary host platforms: LAM Kiyo, 2300 Flex series plasma etch chamber
Control software: LAM fab host, endpoint detection recipe editor
Optical hardware: Matched UV-resistant fiber cable, chamber sapphire viewport
Note: It is dedicated plasma OES hardware; cannot be used as general optical measurement instrument.

Critical Installation Traps

Fiber Alignment & Contamination: The fiber optic port is extremely sensitive to dust and fingerprints. Dirty fiber endfaces cause signal attenuation, noisy spectral traces and false endpoint triggers.
Revision Firmware Matching: Module firmware revision must match chamber tool software. Mismatch results in unrecognized hardware or corrupted spectral data.
UV Optical Degradation: Prolonged plasma UV exposure ages fiber and viewport. Do not reuse fiber harness with visible burn marks.
ESD Vulnerability: The CMOS detector is ESD-sensitive. All handling must be performed in ESD-controlled cleanroom station with grounded wrist strap.
Conformal Coating Integrity: Scratched conformal coating allows corrosion from fluorine-based plasma byproducts, leading to intermittent drift over production cycles.
Dark Calibration Mandatory: After replacement, dark offset and reference spectrum calibration must be executed. Skipping calibration shifts endpoint threshold and causes wafer over-etch.
Stray Light Interference: External light leakage through chamber door seals or viewport leaks adds background noise and disrupts spectral baseline.
Thermal Stabilization: The spectrometer requires warm-up time before spectral stability. Do not run qualification wafers immediately after cold power-up.

Standard Operating Procedure (SOP)

Pre-installation inspection: Inspect housing, fiber connector and PCB coating for damage. Verify part number and revision against chamber BOM.
Lockout and purge: Secure chamber safe state, purge process gas, de-energize chamber auxiliary 24VDC power.
Mechanical replacement: Disconnect fiber cable and communication harness. Remove old spectrometer and mount replacement module on chassis bracket.
Optical and electrical reconnection: Re-seat fiber connector with extreme care, lock communication and power connectors. Avoid touching fiber end surface.
Power-up and self-test: Restore auxiliary power, confirm module power and communication LED status. Run built-in fiber loss and dark noise diagnostic.
Spectral calibration: Execute dark offset and plasma reference calibration in the tool service menu; verify baseline spectrum matches golden reference trace.
Process qualification: Run dry chamber plasma test, monitor spectral trace stability. Process monitor wafers to validate endpoint repeatability before releasing to production.
Decommissioning: Isolate power before removal. Cap fiber port and electrical connectors; pack old unit inside ESD shielding bag for failure analysis.