Mao Gao

*** **** ********* **-**, VESTAL, NY ****0

abmosu@r.postjobfree.com 607-***-****

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OBJECTIVE

Position as a packaging/material engineer in R&D

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QUALIFICATIONS

Expertise in metallurgy and reliability issues such as

intermetallic compound spalling and void formation during

reactivity and interdiffusion between metallic alloys and

substrates, electrical failure of contact probe pins and Sn whisker

formation in Sn thin film; In-depth experience in electronic

assembly, mechanical tests such as shear test and fatigue test in

electronics packaging, failure analysis and material

characterization and thermal analysis; In-depth experience with

simulation of two phase flow and heat transfer

[pic]EXPERIENCE

Research Assistant

Binghamton University 09/2005-present

. Identified and quantified the effects of Sn plating parameters

on Sn whisker formation (ongoing)

. Established quantitative understanding of the effects of

soldering conditions on the formation of intermetallic compounds

(IMCs) at the interfaces between Pb free solders and common pad

finishes

Quantified low temperature reactions between lead-free solders and

Au/Ni substrates

. Identified the process parameters which control the spalling of

IMCs at the SAC/Au/Ni interface

. Identified and analyzed the failure of contact probe pins when

contacted with SAC solders

. Quantified the effects of stress and Cu grain size on voiding at

the SAC/Cu interface

. Educated and trained undergraduates and graduates

Metallurgical Intern Universal Instruments

Corporation SMT 05-08/2005; 05/2006- 05/2007

. Developed systematic understanding of the effects of Cu

plating conditions on voiding at SAC/Cu interface

. Gained in-depth experience with solder bumping, wet etching,

reliability testing and statistical analysis of solder joints

failure, and reflow profile design and experiment design, and

material processes and property relationship

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SELECTED PREVIOUS EXPERIENCE

. Conducted numerical simulation of multi-flow and heat transfer

. Modeled dual-vane swirling combustor for industrial test to

control NOx emission and improve efficiency

. Designed a patented dual-vane swirling combustor and explored

experimental/numerical simulation

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SKILLS

. Expert in microstructure analysis techniques including SEM,

EPMA, EDS, WDS, OM, X-ray, PVD, thermal analysis (reflow oven,

DSC) and metallographic sample preparation

. Experienced in clean room, Photolithography, Profilometer,

FIB, TEM, EBSD, shear test and fatigue test, statistical

analysis

. Experienced in Fortran and C language for programming,

spreadsheet programming, CAD, Matlab

. Fluent in Chinese

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HONORS & ACTIVITIES

. Awarded Excellent Student Scholarships, Wuhan University, 1998

. Led 30 senior students of Wuhan university in a pre-work

internship in a Thermal Power Plant in Wuhan

. Conducted Leadership volunteer in international student

orientation program at Binghamton University

. Assisted in teaching Heat transfer and Manufacturing processes

courses

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EDUCATION

Ph.D., Material Science & Engineering, expected August 2010

Binghamton University, State University of New York at

Binghamton, New York Advisor: Eric Cotts

M.S. (June 2000) & B.S. (June 1997), Mechanical Engineering,

Wuhan University, Wuhan, China

Mao Gao

200 RANO BOULEVARD 2B-18, VESTAL, NY 13850

abmosu@r.postjobfree.com (607) 765- 5872

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PUBLICATIONS AND PRESENTATIONS

. M.Gao, L.Yin, P.Kondos, P. Borgesen and E. Cotts:" Effects of

Stress and Strain on Void Growth in Cu3Sn", Pb-Free and RoHS-

Compliant Materials and Processes for Microelectronics, C.A.

Handwerker, K. Suganuma, H.L.Reynolds, J. Bath, eds., MRS Spring

Meeting, April 2007

. Liang Yin, Pericles Kondos, Peter Borgesen, Yihua Liu, Stoyan

Bliznakov, Fred Wafula, Nikolay Dimitrov, Donald W.

Henderson, Christopher Parks, Mao Gao, Joseph Therriault, Ju

Wang and Eric Cotts," Controlling Cu Electroplating to Prevent

Sporadic Voiding in Cu3Sn", 406-414, 2009 ECTC conference

. Mao Gao, Eric Cotts, "Interfacial reactions between Sn-3.0Ag-

0.5Cu lead-free solder alloys and electrolytic Au/Ni substrates:

Conditions which lead to Spalling", Manuscript in preparation

. Mao Gao, James Woods, Eric Cotts, James Forster, "Interfacial

Reactions in Pogo Probe Pins for Sn-Ag-Cu Solders", Manuscript

in preparation

. Mao Gao, Kentaro Miura, Eric Cotts, "Formation and Growth

Kinetics of Intermetallic Compounds at Sn-3.0Ag-0.5Cu (wt.%)

Solder Alloys/Au/Ni Interfaces during Reflow", Manuscript in

preparation

. Mao Gao, "Interfacial reactions between Sn-3.0Ag-0.5Cu lead-free

solder alloys and electrolytic Au/Ni substrates", October 26,

2009, presented at Material Science & Technology conference in

Pittsburg, PA.

. Mao Gao, "Formation of Intermetallic Compounds at 460 m Sn-3.0Ag-

0.5Cu (wt.%) Solder alloys/Ni Interfaces: spalling of

(CuNiAu)6Sn5 from (Ni,Cu)3Sn4" October 28, 2009, presented at

Universal Instrument Consortium, Owego, NY.

. Mao Gao, "Interfacial reactions between near Eutectic Sn-Ag-Cu

solder alloys and electrolytic Au/Ni substrates", presented at

139th TMS Annual meeting & exhibition in Seattle, WA (February,

2010)

. Mao Gao, "The Spalling of (Cu,Ni,Au)6Sn5 in the Liquid State Sn-

Ag-Cu Solder Alloys on Au/Ni Substrates", October, 2008,

presented at Material Science & Technology conference in

Pittsburg, PA.

. Mao Gao, "Spalling and Voiding during Interfacial Reactions of

Sn-Ag-Cu Solders on Au/Ni Substrates", November, 2007, presented

at Unovis consortium in Kirkwood, NY.

. Jin Zhenqi, Tang Biguang, Gao Mao, "An Oil-free Ignition

Technology, High Energy Plasma Ignition, Used in Pulverized Coal

Fired Boiler", Energy Conservation, 1999, 11, pp 12 -14

(Chinese)

. Gao Mao, Tang Biguang, Wu Jiang, Zhang Mingchuan, "Experimental

Study on Dual-channel Swirling Pulverized Coal Combustor with

Coal Concentrator", East China Electric Power, 2002, 10, pp 32 -

34, (Chinese)

. Wu Jiang, Zhang Mingchuan, Yin bin, Chen Qifeng, Gao Mao,

"Application of Local Holographic Difference Scheme on Numerical

Simulation of Driven Flow in a Polar Cavity", Journal of

Shanghai Jiao Tong University, 2002, v 36, pp 1104 - 1106,

(Chinese)

. Gao Mao, Zhang Mingchuan, Wu Jiang, "The Cold Functional Test of

Dual-vane Swirling Burner Embedded with Concentrated-thin

Separator", Power System Engineering, 2003, V19,pp4-6, (Chinese)

. Gao Mao, Wu Jiang, Zhang Mingchuan, Tang Biguang, "Experimental

Study on the Performance of Concentrated-thin Swirling

Pulverized Coal Burner with Low Load", Boiler Technology,

2003,V34,pp34-37,(Chinese)

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