Thin film growth and Applications

“The Art of Laying Apples”

David Mortimer

Physics Teacher

San Felipe Del Rio CISD

Dr. Haiyan Wang • Education and appointments:• B.S. and M.S. in Materials Science and

Engineering in China• Ph.D. in Materials Science and

Engineering, 2002, North Carolina State University (Raleigh, NC)

• Postdoc (03-04) and Staff Member (05) at Los Alamos National Laboratory

• Assistant Professor in Electrical and Computer Engineering (Jan. 2006)

• Staff Member at Los Alamos National Lab (summer 2006)

Assistant Professor

Electrical and Computer Engineering

Texas A&M University

Dr. Haiyan Wang • Honors

• ONR Young Investigator Program Award, ONR-YIP 2008.

• Air Force Young Investigator Research Program Award, AFOSR-YIP, 2007.

• Air Force Summer Faculty Fellowship, AFOSR, 2007 and 2008.

• TMS Young Leader representing the Electronic, Magnetic and Photonic Materials Division. (Minerals, Metals and Materials Society, TMS 2005)

• Lab Director Funded Postdoctoral Fellow, Los Alamos National Laboratory (2002-2004).

• Materials Research Society Graduate Student Award ( Fall 01, Boston)

• Patents 8 patents in the areas of thin film architecture and high temperature superconductors

• Selected journal publications (105 journal articles and 70 conference proceedings and presentations by January 2008)

Assistant Professor

Electrical and Computer Engineering

Texas A&M University

Our GroupDr. Wang, Crystal Woods, David Mortimer

Research areas

1. Nanostructured nitride and oxide thin film heterostructures for microelectronics, optoelectronics, magnetic and structural applications

2. Coated superconductor materials scale-up and architectures; Flux-pinning mechanisms of nanoparticles and defects in high temperature superconductors

3. Microstructural characterizations with transmission electron microscopy(TEM), high resolution TEM, Scanning transmission electron microscopy

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Roy Araujo : Functional Nitride Thin FilmsPeru

Joon Hwan Lee Optical , transparency, transmittanceSouth Korea

Ick Chan Kim Prop. Of film through thickness change South Korea

Zhenxing Bi Deposition PatternsChina

Jong Sik Yoon Functional Oxide Thin Films South Korea

Jie (Joyce) Wang High Temperature Super Conductor

Harrison Tsai same as Joyce

Sunmee Cho, South Korea

The GoalExploit Physical Properties

To find the optimal parameters which will allow for the growth/adhesion onto different substrates to meet industrial needs on a scale of nanometers or atomic scale in an economical and environmentally safe process. A similar, but somewhat different concept would be to change the atomic structure of some materials to meet a specific industrial need.

What can Thin Films and Coatings do for us?

Thin Film is a thin layer of coating on a substrate or template. It serves one or multiple physical purposes including protection, decoration, conducting, reflection, data storage, insulation, etc.

Examples• Colorful coatings on cars, golden watches • Corrosion resistive coatings and super hard coatings

(petroleum industry, chemical factories, etc.)• Semiconductor industry (Pentium processors,

microchips, memories, iPod, etc.).

Real World Examples of Thin film growth (On a larger than nanometer scale)

• Dust on a car

• Fog on a window

• Snowfall

• Fertilizing a yard These would actually be called thick film because their

size is greater than one micrometer.

Problems with the application of the previous examples

• Dust on a car

• Fog on a window

• Snowfall

• Fertilizer

• It Rains or someone writes “Wash Me”

• Inconsistent surface or it begins to form water droplets and drip

• Air pollution as it falls contaminates or it doesn’t stick

• Inconsistent application

How big is a nanometer?

• A nanometer is a unit of measure. Just like inches, feet and miles. By definition a nanometer is one-billionth of a meter. A meter is about 39 inches long. A billion is a thousand times bigger than a million, as a number you write it out as

1,000,000,000.

What is a nanometer website

• http://www.cellsalive.com/howbig.htm

Tentative plan for your summer research

• Session 1-2: presentations on our lab research, thin film introduction, simple growth model, and vacuum science (given by Dr. Wang)

• Session 3-7: lab work on assembling a simple vacuum system for thin film deposition (assisted by graduate students, Jongsik Yoon, Zhenxing Bi and Ickchan Kim)

Tentative plan for your summer research, cont.

• Session 8-11: thin film deposition using pulsed laser deposition and the simple vacuum system built, thin film property measurement (electrical and mechanical measurements, assisted by graduate students, Jongsik Yoon, Ickchan Kim and Roy Araujo)

• Session 12-15: building a simple teaching model to illustrate thin film growth structure (ball models, with help from graduate students) and prepare for final report

So, what cha been doing?

Hitachi U-4100 Spectrophotometer

Working with the Spectrophotometer

Sample preparation for TEMS

Diamond Saw

Polisher/grinder

Sample prep

Sample prep

Optical Microscope

Dimpler Machine 80 micron-20

Ion miller to make the hole

This is what we were trying to accomplish.

TEM Imaging

1-2 nm high resolution

Transmission Electron Microscope

What cha gonna be doing?

Pulsed Laser Deposition System

High temperature annealing/for better crystal structuring

Vacuum chamber

Control box for vacuum pumps for the PLD

Pulsed Laser Deposition system

What am I going to do with this?

• Make and try to stack crystal structures.

What am I going to do with this?

• Test properties of materials.

• Work with Gas laws to discuss what is going on in the vacuum chamber.

• Kinetic Theory

• Much, much, more!!!!!!!!

Acknowledgements

04/22/23 Free template from www.brainybetty.com