Dr. Jason O. Clevenger is a Managing Scientist in Exponent’s Mechanical Engineering and Materials/Metallurgy practice. Dr. Clevenger’s expertise includes materials characterization and analysis, physical chemistry, thin film technologies, advanced materials, laser technology, and MEMS. His characterization experience encompasses a broad range of advanced technologies including laser spectroscopy, X-ray photoelectron spectroscopy (XPS), Auger spectroscopy, Raman, FTIR, solid/liquid-NMR, optical emission/absorption spectroscopy, energy dispersive spectroscopy (EDS), white-light interferometry, spectroscopic ellipsometry, atomic force microscopy (AFM), and secondary ion mass spectrometry (SIMS).
He has extensive experience with plasma chemistry and spectroscopy, thin film metrology and reliability, high vacuum technology, laser, optical, microwave systems, and semiconductor process engineering.
Dr. Clevenger’s physical chemistry experience is applicable to problems involving materials such as semiconductors, MEMS, metal films, dielectrics, polymers, materials processing, materials characterization, medical devices, pharmaceutical process chemistry and engineering, identification of trace contaminants including organics and particulates, and corrosion processes.
Clevenger JO. Safe surface—Anti-microbial coatings for implants. Medical Device Developments 2007.
Ibarreta A, Davis S, Clevenger JO. Flammability of electrical crimp connectors subjected to heating. Proceedings, Fire and Materials 10th International Conference, 2007.
Kay JJ, Byun DS, Clevenger JO, Jiang X, Petrovic VS, Seiler R, Barchi JR, Merer AJ, Field RW. “Spectrum-only” assignment of core-penetrating and core-nonpenetrating Rydberg states of calcium monofluoride. Canadian Journal of Chemistry 2004; 82(6):791–803.
Brooks CB, Anderson RB, Clevenger JO, Collard C, Halim M, Sahin T, Mak, AW. Optimization of chrome dry etch in Tetra II using asymmetrically loaded patterns. Proceedings, SPIE-The International Society for Optical Engineering, 2003, 5256 (Pt. 2, 23rd Annual BACUS Symposium on Photomask Technology, 2003), pp. 749–757.
Collard C, Anderson SA, Anderson RB, Clevenger JO, Halim M, Brooks CB, Buie MJ, Sahin T. Examination of various endpoint methods for chrome mask etch. Proceedings, SPIE-The International Society for Optical Engineering, 2003) 5256 (Pt. 2, 23rd Annual BACUS Symposium on Photomask Technology, 2003), pp. 744–748.
Hammond E, Clevenger JO, Buie MJ. Plasma and flow modeling of photomask etch chambers. Proceedings, SPIE-The International Society for Optical Engineering, 2003, 5256 (Pt. 2, 23rd Annual BACUS Symposium on Photomask Technology, 2003), pp. 713–723.
Anderson SA, Anderson RB, Buie MJ, Chandrachood M, Clevenger JO, Lee Y, Sandlin NL; Ding J. Optimization of a 65-nm alternating phase-shift quartz etch process. Proceedings, SPIE-The International Society for Optical Engineering, 2003; 5256 (Pt. 1, 23rd Annual BACUS Symposium on Photomask Technology, 2003), pp. 66–75.
Clevenger JO, Buie MJ, Sandlin NL. Effect of chamber seasoning on the chrome dry etch process. Proceedings, SPIE-The International Society for Optical Engineering, 2003, 5130 (Photomask and Next-Generation Lithography Mask Technology X), pp. 92–100.
Li L, Dai X, Liu Y, Clevenger JO, Field RW, Jeung GH, Geum N, Lyyra AM. The Predissociation of the 1
3S
g- State of
7Li
2. Journal of Molecular Spectroscopy 2001; 205(1):139–145.
Dai X, Clevenger JO, Liu Y, Song M, Shang J, Chen D, Field RW; Li L. The 2
3Dg State of
7Li
2. Journal of Molecular Spectroscopy 2000; 200(1):120–122.
Clevenger JO, Harris NA, Field RW, Li J. The predissociation mechanism for 2
S+ Rydberg states of CaCl. Journal of Molecular Spectroscopy 1999; 193(2):412–417.
Clevenger JO, Tellinghuisen, J. The B(1/2
2P
3/2) - X(1/2
2S+) transition in XeBr. Journal of Chemical Physics 1995; 103(22):9611–9620.
Clevenger JO, Tellinghuisen J. High-resolution spectroscopy with a CCD array detector. The B – X transition in
136Xe
81Br. Chemical Physics Letters 1994; 231(4,5,6):515–520.
Clevenger JO, Ray QP, Tellinghuisen J, Zheng X, Heaven MC. Spectroscopy of metastable species in a free-jet expansion: The
b – A transition in IBr. Canadian Journal of Physics 1994;72(11&12):1294–1306.
Radzykewycz DT, Littlejohn CD, Carter MB, Clevenger JO, Purvis JH, Tellinghuisen J. The D' – A' transition in IBr: A deperturbation analysis. Journal of Molecular Spectroscopy 1994; 166(2):287–303.