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California Polytechnic State University, San Luis Obispo

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In-Situ Film Thickness Measurements For Real-Time Monitoring And Control Of Advanced Photoresist Track Coating Systems, Richard N. Savage, Thomas E. Metz, Horace O. Simmons Jan 1991

In-Situ Film Thickness Measurements For Real-Time Monitoring And Control Of Advanced Photoresist Track Coating Systems, Richard N. Savage, Thomas E. Metz, Horace O. Simmons

Materials Engineering

This paper explores the methodologies of real-time measurement of photoresist film thickness on silicon wafers using multi-wavelength reflection interferometry. Reflected light from the wafer's surface, containing the interference profile, is collected in-situ via a fiber optic cable and film thickness is determined in real-time via a pattern recognition algorithm. The instrumentation used to make this measurement and its application toward optimizing track performance during spin-coating and back are discussed. Data demonstrating basic thickness versus spin-time and thickness versus bake-time profiles acquired on-line without process disruption are presented along with its utilization toward minimizing process set-up and machine qualification. Moreover, the …


Minimax-Optimal Stop Rules And Distributions In Secretary Problems, Theodore P. Hill, Ulrich Krengel Jan 1991

Minimax-Optimal Stop Rules And Distributions In Secretary Problems, Theodore P. Hill, Ulrich Krengel

Research Scholars in Residence

For the secretary (or best-choice) problem with an unknown number N of objects, minimax-optimal stop rules and (worst-case) distributions are derived, under the assumption that $N$ is a random variable with unknown distribution, but known upper bound n. Asymptotically, the probability of selecting the best object in this situation is of order of (log n)-1. For example, even if the only information available is that there are somewhere between 1 and 100 objects, there is still a strategy which will select the best item about one time in five.


In-Line Photoresist Thickness Monitor, Richard N. Savage, Tom W. Batchelder, Kenneth M. Sautter, Gary H. Memovich Dec 1990

In-Line Photoresist Thickness Monitor, Richard N. Savage, Tom W. Batchelder, Kenneth M. Sautter, Gary H. Memovich

Materials Engineering

An in-line photoresist thickness measuring device wherein a plurality of projection optical fibers are disposed over a wafer processing track for illuminating portions of a wafer as the wafer proceeds along the track. The light scattered back from each illuminated portion is detected by a corresponding plurality of pickup optical fibers and communicated to an optical fiber multiplexer. The multiplexer sequentially selects the optical signal from each pickup optical fiber and communicates the light from the selected pickup optical fiber to a spectrometer. The spectrometer simultaneously diffuses the scattered light into a plurality of light bands, each light band having …


Mustang Daily, November 30, 1990 Nov 1990

Mustang Daily, November 30, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 29, 1990 Nov 1990

Mustang Daily, November 29, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 28, 1990 Nov 1990

Mustang Daily, November 28, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 20, 1990 Nov 1990

Mustang Daily, November 20, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 14, 1990 Nov 1990

Mustang Daily, November 14, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 8, 1990 Nov 1990

Mustang Daily, November 8, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 7, 1990 Nov 1990

Mustang Daily, November 7, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 6, 1990 Nov 1990

Mustang Daily, November 6, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 5, 1990 Nov 1990

Mustang Daily, November 5, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, November 2, 1990 Nov 1990

Mustang Daily, November 2, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 25, 1990 Oct 1990

Mustang Daily, October 25, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 24, 1990 Oct 1990

Mustang Daily, October 24, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 23, 1990 Oct 1990

Mustang Daily, October 23, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 18, 1990 Oct 1990

Mustang Daily, October 18, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 17, 1990 Oct 1990

Mustang Daily, October 17, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 16, 1990 Oct 1990

Mustang Daily, October 16, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 15, 1990 Oct 1990

Mustang Daily, October 15, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 11, 1990 Oct 1990

Mustang Daily, October 11, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Mustang Daily, October 9, 1990 Oct 1990

Mustang Daily, October 9, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Academic Senate - Meeting Minutes, 10/2/1990, Academic Senate Oct 1990

Academic Senate - Meeting Minutes, 10/2/1990, Academic Senate

Academic Senate Minutes

No abstract provided.


Prefatory Notes Oct 1990

Prefatory Notes

Between the Species

No abstract provided.


Brahma Bull, Mary Sternberg Oct 1990

Brahma Bull, Mary Sternberg

Between the Species

No abstract provided.


Animal Liberation As A Valid Response To Structural Violence, Amy Liszt Oct 1990

Animal Liberation As A Valid Response To Structural Violence, Amy Liszt

Between the Species

No abstract provided.


Response, Susan Finsen Oct 1990

Response, Susan Finsen

Between the Species

No abstract provided.


Biological Holism And The Evolution Of Ethics, Kristin Shrader-Frechette Oct 1990

Biological Holism And The Evolution Of Ethics, Kristin Shrader-Frechette

Between the Species

No abstract provided.


Mustang Daily, October 1, 1990 Oct 1990

Mustang Daily, October 1, 1990

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.


Critical Notice Of Morals, Reason, And Animals, James Lindemann Nelson Oct 1990

Critical Notice Of Morals, Reason, And Animals, James Lindemann Nelson

Between the Species

No abstract provided.