GexSi1−x Waveguides Grown by Rapid Thermal Processing Chemical Vator Deposition

1991 ◽  
Vol 220 ◽  
Author(s):  
K. H. Jung ◽  
R. A. Mayer ◽  
T. Y. Hsieh ◽  
J. C. Campbell ◽  
D. L. Kwong
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Chemical Vapor ◽  
Directional Couplers ◽  
Rib Waveguides ◽  
Optical Waveguiding

ABSTRACTWe report the growth and characterization of GexSi1−x films for optical waveguiding. GexSi1−x/Si waveguides were grown by rapid thermal processing chemical vapor deposition. An average attenuation of 3.3 dB/cm was achieved for a 1 μm thick Ge0.04Si0.96 layer patterned into rib waveguides 2000 Å deep with widths of 5 μm. Directional couplers were also fabricated. Average coupling efficiencies of 85% were achieved for 1.5 μm interwaveguide separation.

Multizone Rapid Thermal Processing to Overcome Challenges in Carbon Nanotube Manufacturing by Chemical Vapor Deposition

2019 ◽  
Author(s):  
Jaegeun Lee ◽  
Moataz Abdulhafez ◽  
Mostafa Bedewy
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Growth Dynamics ◽  
Chemical Vapor ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Scalable Production

Abstract For the scalable production of commercial products based on vertically aligned carbon nanotubes (VACNTs), referred to as CNT forests, key manufacturing challenges must be overcome. In this work, we describe some of the main challenges currently facing CNT forest manufacturing, along with how we address these challenges with our custom-built rapid thermal processing chemical vapor deposition (CVD) reactor. First, the complexity of multistep processes and reaction pathways involved in CNT growth by CVD limits the control on CNT population growth dynamics. Importantly, gas-phase decomposition of hydrocarbons, formation of catalyst particles, and catalytic growth of CNTs are typically coupled. Here, we demonstrated a decoupled recipe with independent control of each step. Second, significant run-to-run variations plague CNT growth by CVD. To improve growth consistency, we designed various measures to remove oxygen-containing molecules from the reactor, including air baking between runs, dynamic pumping down cycles, and low-pressure baking before growth. Third, real-time measurements during growth are needed for process monitoring. We implement in situ height kinetics via videography. The combination of approaches presented here has the potential to transform lab-scale CNT synthesis to robust manufacturing processes.

Limited Reaction Processing: Silicon and III–V Materials

1987 ◽  
Vol 92 ◽  
Author(s):  
James F. Gibbons ◽  
S. Reynolds ◽  
C. Gronet ◽  
D. Vook ◽  
C. King ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Chemical Vapor ◽  
Group Iv ◽  
Interface Quality ◽  
A New Technique ◽  
Transistor Fabrication ◽  
Reaction Processing

ABSTRACTLimited Reaction Processing (LRP) is a new technique which combines Rapid Thermal Processing (RTP) and Chemical Vapor Deposition (CVD). The added temperature control provided in rapid thermal processing enables the use of substrate temperature as a reaction switch. In addition, rapid thermal technology has been shown to provide other advantages for chemical vapor deposition of Si and III–V materials. Results are presented for group IV materials including epitaxial Si, SiGe alloys, SiO2 , and polysilicon. MOSFETs have been demonstrated and sensitive tests of interface quality are presented, paving the way for future bipolar transistor fabrication. III–V materials such as GaAs, AlGaAs, InGaAs have been grown. GaAs electron mobilities are the best reported for material grown using trimethylarsenic. As-ambient rapid thermal anneals of GaAs have also been performed.

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