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     Semi-Conductor Applications

Multi-Channel Process Monitor used in Semi-Conductor Fabrication

Multiple Probes Spectrophotometer System (MPSS)

The MPSS system has been installed and accepted throughout the semiconductor industry, with many international and domestic installations for "End Point" process applications such as chemical mechanical polish (CMP), photo-resist coating, thickness measurements, and plasma etching fabrications.  

There are 5 spectrometers in an MPSS system. The typical spectral range is from 500 to 950nm. Other ranges are available depending on the application requirements. The MPSS incorporates a high speed spectral acquisition driver that can obtain 5 scans simultaneously from each probe in just 12.5 ms. This provides the fastest data collection possible to meet the high throughput requirements for the modern production environment.

The MPSS operating software can be customized for specific needs using the powerful Visual Basic platform. It has "change on site" capabilities. Working with the Microsoft office package it can link the ACCESS database and EXCEL spreadsheet programs together using the OLE method, so the data can be exported to standard database and spreadsheet formats without extra layers of software.

The MPSS incorporates fiber optic reflectance probes designed to carry signal for up to 400 feet. This allows a hazardous sample environment to be linked to an office site for data analysis and network distribution.

 

MPSS Specifications:
* Typical spectral range from 500 to 950nm
* Spectrum resolution at 5nm
* Every 5 spectra per 12.5 ms.
* Simultaneous acquire of 5 spectra, each has own capture buffer, each optical channel has its own digitizer (A2D).
* Industrial computer system to provide 24 hours nonstop service to meet the 3 shift production floor requirement.
* Build in raw data storage management, system for resources monitoring.
* Dimensions: 16 inch by 12 inch by 7 inch with 21 lb. weight.
* Optical engineer provides probe design to fit new application requirements and performs analysis for complete system integration.
* System is provided with 35 Watts 5V halogen lamp light source, designed to last many years at 24 hours of service.
* System includes one year warranty.
* Ethernet card installed for network communications.

MPSS operating software includes utility functions for:
DISPLAYS - Display of spectrum for each channel.
VALVE - Controls the 8 digital IO driver and triggering signals.
TEMPLATE - Compares the incoming spectrum with stored spectrums for appropriate process control actions.
CALIBRATION - Calibrates the system to ensure the reproducibility.
LOOPTEST – Performs self-diagnostic to detect faulty components.
THICKNESS - Performs measurement of the thin film thickness.
COLOR – Performs CIE color coordinate measurements.

The MPSS delivers powerful real-time performance in a small package. Designed to provide industrial solutions, the MPSS fits the small budget at $29,000 per system.

   
         
 

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