My experience is in development and manufacturing of electronic components. After obtaining my PhD in Chemical Engineering from the University of California, Berkeley in Chemical Engineering (with an Electrochemical Engineering focus), I worked for several years as a researcher on electrochemical sensor, batteries, and fuel cells. I then worked for several years in the field of EMI shielding developing metal-filled gaskets and paints. Since 1996 I've been working on development of passive components such as capacitors, inductors and resistors. A signficant part of this work has been with capacitors that have one electrode that is an intrisincally conducting polymer. Below you can find a list of papers that I and my co-authors have published.
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Y. Freeman and P. Lessner, Evolution of Polymer Tantalum Capacitors , Appl. Sci. 11(12), 5514 (2021).
Y. Freeman, P. Lessner and I. Luzinov, Reliability and Failure Mode in Solid Tantalum Capacitors , ECS J. Solid State Sci. Technol., 10(4) (2021).
E. N. Tarekegn, W. R. Harrell, I. Luzinov, P. Lessner and Y. Freeman, Environmental Stability of Polymer Tantalum Capacitors , ECS J. Solid State Sci. Technol. 9 083005 (2020).
Y. Freeman, P. Lessner, High Temperature – High Voltage Solid Electrolytic Tantalum Capacitors ,IMAPS High Temperature Electronics Network, p. 91 (HiTEN 2019).
P. Lessner, KEMET-100 Years of Continued Innovation , IEEE Power Electronics Magazine Vol. 6 Issue 2 (June 2019).
A. Chacko, J. Chen, C. Stolarski, C. MotaCaetano, P. Lessner, Development of High Temperature Tantalum Polymer Capacitors , Proceedings of the 51st International Symposium on Microelectronics, IMAPS (2018).
A.P. Chacko, Y. Jin Y. Shi, A. Bunha, J. Chen, P. Lessner, Advances in Reliability of Conducting Polymers and Conducting Polymer Based Capacitors in High Humidity Environment , ECS Transactions, Vol. 85, No. 13, p. 115 (2018).
Y. Freeman, I. Luzinov, R. Burtovyy, P. Lessner, W. R. Harrell, S. Chinnam and J. Qazi, Capacitance Stability in Polymer Tantalum Capacitors with PEDOT Counter Electrodes , ECS J. Solid State Sci. Technol. 6 N104 (2017).
Y.Jin, J. Chen, P. Lessner, Thermal Stability Investigation of PEDOT Films from Chemical Oxidation and Prepolymerized Dispersion , Electrochemistry (2013).
X. Xu, A. Gurav, P. Lessner, C.A. Randall, Robust BME Class-I MLCCs for Harsh-Environment Applications , IEEE Transactions on Industrial Electronics Vol. 58, Isssue 7 (July 2011).
Y.Freeman, P.Lessner, A.J.Kramer, E.C.Dickey, J.Koenitzer, L.Mann, Q. Chen, T.Kinard, J.Qazi, Low Voltage Specific Charge (CV/g) Loss in Ta Capacitors , J. Electrochem. Soc., Vol.157 Issue 7 (2010).
Y. Freeman, W.R. Harrell, I. Luzinov, B. Holman, P. Lessner, Electrical characterization of tantalum capacitors with poly (3, 4-ethylenedioxythiophene) counter electrodes , J. Electrochem. Soc. Vol. 156, p.G65 (2009).
M. Oka, S. Hardaker, F. Nazir, R. Gregory, K. Brenneman, P. Lessner, Effect of Process Variables and Dopants on Characteristics of Electrochemically-Deposited PEDOT Films , MRS Online Proceedings Library,Volume 736, article number 78, (2002).
B. Melody, T. Kinard, P. Lessner, The Non‐Thickness‐Limited Growth of Anodic Oxide Films on Valve Metals , Electrochem. Solid-State Lett. Vol. 1, p.126 (1998).
P. Lessner, F.R.McLarnon, J. Winnick, E.J.Cairns, The Dependence of Aqueous Sulfur‐Polysulfide Redox Potential on Electrolyte Composition and Temperature , J. Electrochem. Soc., Vol. 140, p. 1847 (1993).
P. Lessner, F. McLarnon, J. Winnick, E. Cairns, Aqueous polysulphide flow-through electrodes: Effects of electrocatalyst and electrolyte composition on performance ,Journal of Applied Electrochemistry, 22, 927 (1992).
S. Sarangapani, P. Lessner, J. Forchione, A. Griffith, A. LaConti, Advanced double layer capacitors ,Journal of Power Sources 29, 355 (1990).
J. Winnick, P. Lessner, F. McLarnon, E. Cairns, Solution processes in photoelectrochemical cells ,Appl. Phys. Lett. 53, 1985 (1988).
P. Lessner, F.R.McLarnon, J. Winnick, E.J.Cairns, Kinetics of Aqueous Polysulfide Solutions Part III . Investigation of Homogeneous and Electrode Kinetics by the Rotating Disk Method , J. Electrochem. Soc., Vol. 134, No. 11, p. 2669 (1987).
P. Lessner, F.R.McLarnon, J. Winnick, E.J.Cairns, Kinetics of Aqueous Polysulfide Solutions: II . Electrochemical Measurement of the Rates of Coupled Electrochemical and Chemical Reactions by the Potential Step Method , J. Electrochem. Soc., Vol. 133, No. 12, p. 2517 (1986).
P. Lessner, F.R.McLarnon, J. Winnick, E.J.Cairns, Kinetics of Aqueous Polysulfide Solut ions I . Theory of Coupled Electrochemical and Chemical Reactions, Response to a Potential Step , J. Electrochem. Soc., Vol. 133, No. 12, p. 2510 (1986).
P.Lessner, J. Newman, Hydrodynamics and Mass Transfer in a Porous‐Wall Channel , J. Electrochem. Soc., Vol. 131, No. 8, p. 1828 (1984).
P. Lessner, YAGEO Technology for AI, YAGO AI Summit (2024).
P. Lessner, M. Laps, YAGEO Component Solutions for AI, TTI Distribution Download Podcast (2023).
P. Lessner, P. Blais, AI’s Impact on Electronics, TTI Distribution Download Podcast (2023).
P. Lessner, M. Laps, What is AI?, TTI Distribution Download Podcast (2023).
P. Lessner, Choosing the Right Polymer Capacitor: A Guide for the Perplexed, KEMET Webinar (2021).
V. Andoralov, M. Evaristo, R. Monteiro, P. Lessner, Aluminum polymer capacitor with enhanced internal conductance and breakdown voltage capability US11398357B2
A. Bunha, A. Chacko, Y. Shi, Q. Chen, P. Lessner, Formulation for use with conducting polymers in solid electrolytic capacitors US11396594B2
A. Chacko, E. Key, P. Lessner, High temperature polymer hermetically sealed capacitors US11393637B2
A, Bunha, A. Chacko, Q. Chen, Y. Shi, P. Lessner, Conductive polymer capacitor for improved reliability US11177076B2
V. Andoralov, M. Evaristo, R. Monteiro, P. Lessner, Aluminum polymer capacitor with enhanced internal conductance and breakdown voltage capability US11152161B2
A, Bunha, A. Chacko, Q. Chen, Y. Shi, P. Lessner, Conductive polymer capacitor for improved reliability US11101077B2
A. Templeton, J. Bultitude, L. Jones, P. Lessner, Gate drive interposer with integrated passives for wide band gap semiconductor devices US11037871B2
A, Bunha, A. Chacko, Q. Chen, Y. Shi, P. Lessner, Polyanion copolymers for use with conducting polymers in solid electrolytic capacitors US10947376B2
J. Bultitude, L. Jones, A. Templeton, P. Lessner, Packages for power modules with integrated passives US10950688B2
A. Bunha, A. Chacko, Y. Shi, Q. Chen, P. Lessner, Conductive polymer dispersion for improved reliability US10943742B2
J.Bultitude, P. Lessner, A. Gurav, Multilayered ceramic capacitor structures for use at high power US10840023B2
S. Hussey, Y. Freeman, G. Guerrero, C. Stolarski, J. Kelly, P. Lessner, S. Lingala, J. Qazi, Method to reduce anode lead wire embrittlement in capacitors US10777362B2
V. Andoralov, D. Sa, A. Fonseca, A. Chacko, Y. Shi, P. Lessner, Hybrid capacitor and method of manufacturing a capacitor US10770240B2
A, Bunha, A. Chacko, Q. Chen, Y. Shi, P. Lessner, Process for forming a solid electrolytic capacitor US10658121B2
A, Bunha, A. Chacko, Q. Chen, Y. Shi, P. Lessner, Conductive polymer dispersion for improved reliability US10650980B2
A. Chacko, P. Lessner, J. Ols, Y. Shi, Q. Chen, Conductive polymer dispersion with enhanced coverage US10643796B2
A. Bunha, A. Chacko, Y. Shi, Q. Chen, P. Lessner, Polyanion copolymers for use with conducting polymers in solid electrolytic capacitors US10340091B2
L. Ning, Q. Chen, P. Lessner, Method of producing solid electrolytic capacitor and capacitor made thereby US10199175B2
J. Bultitude, P. Lessner, A. Gurav, Multilayer ceramic capacitor structures for use at high power US10147544B1
A. Chacko, G. Sivasankarapillai, Y. Shi, P. Lessner, Linear Hyperbranched Polymers as Performance Additives US10128054B2
Y. Freeman ,S. Hussey, J. Cisson, P. Lessner, Tantalum capacitor with polymer cathode US10062519B2
R. Hahn, J. Poltorak, B. Summey, A. Chacko, J. Kinard, P. Lessner, Low ESR Capacitor US9959979B2
R. Hill, P. Lessner, R. Phillips, K. Brown, J. Byrd, Multilayered ceramic capacitor with improved lead frame attachment US9799449B2
A. Chacko, J. McConnell, R. Ramsbottom, P. Lessner, R. Hahn, J. Bultitude, Method of improving electromechanical integrity of cathode coating to cathode termination interfaces in solid electrolytic capacitors US9748043B2
A. Chacko, Y. Jin, R. Hahn, Y. Qiu, P. Lessner, K. Brenneman, Materials and method for improving corner and edge coverage of solid electrolytic capacitors US9236191B2
S. Hussey, Y. Freeman, P. Lessner, Q. Chen, J. Qazi, Hermetically sealed polymer capacitors with high stability at elevated temperatures US9147530B2
B. Summey, J. Poltorak, P. Lessner, Y. Qiu, R. Hahn, D. Jacobs, K. Brenneman, A. Harrington, C. Stolarski, Solid electrolytic capacitor and method of manufacture US9053866B2
J. McConnell, J. Bultitude, R. Phillips, R. Hill, G. Renner, P. Lessner, A. Chacko, J. Bell, K. Brown, Electronic component termination and assembly by means of transient liquid phase sintering and polymer solder pastes US8902565B2
Q. Chen, H. Zhang, A. Chacko, P. Lessner, R. Hahn, Y. Qiu, K. Brenneman, Process for producing electrolytic capacitors and capacitors made thereby US8771381B2
S. Hussey, Y. Freeman, P. Lessner, Method for making anodes for high voltage electrolytic capacitors with high volumetric efficiency and stable D.C. leakage US8349030B1
Y. Freeman, Y. Qiu, S. Hussey, P. Lessner, High voltage and high efficiency polymer electrolytic capacitors US8323361B2
Y. Freeman, P. Lessner, J. Poltorak, R. Hahn, NbO capacitors with improved performance and higher working voltages US8325465B2
Y. Freeman, P. Lessner, J. Poltorak, S. Hussey, High volumetric efficiency anodes for electrolytic capacitors US8308825B2
Y. Qiu, Q. Chen, P. Lessner, R. Hahn, C. Prince, K. Brenneman Process for manufacturing low ESR conductive polymer based solid electrolytic capacitors US7754276B2
J. Prymak, C. Stolarski, D. Jacobs, C. Wayne, P. Lessner, J. Kinard, A. Melody, G. Dunn, R. Croswell, R. Chelini, Thin solid electrolytic capacitor embeddable in a substrate US7745281B2
Y. Freeman, P. Lessner, Method for making anodes for electrolytic capacitor with high volumetric efficiency US7731893B2
P. Lessner, B. Melody, J. Kinard, J. Schott, Capacitor US7667954B2
G. Dunn, J. Savic, P. Lessner, A. Harrington Method for forming a capacitor having a copper electrode and a high surface area aluminum inner layer US7605048B2
A. Chacko, Q. Chen, R. Hahn, J. Kinard, P. Lessner, B. Melody, Electrode compositions containing carbon nanotubes for solid electrolyte capacitors US7348194B2
K. Brenneman, K. Moore, P. Lessner, Method of electrolytic deposition of an intrinsically conductive polymer upon a non-conductive substrate US7221554B2
B. Melody, J. Kinard, D. Persico, C. Stolarski, P. Lessner, Q. Chen, K. Pritchard, A. Harrington, D. Wheeler, Protecting resin-encapsulated components US7125429B2
B. Melody, J. Kinard, D. Wheeler, P. Lessner, Capacitor prepared from a non-aqueous electrolyte US6896782B2
B. Melody, J. Kinard, D. Persico, C. Stolarski, P. Lessner, Q. Chen, K. Pritchard, A. Harrington, D. Wheeler, Protecting resin-encapsulated components US6845004B2
P. Lessner, B. Melody, J. Kinard, E. Reed, A. Harrington, D. Persico, D. Wheeler, Surface mount aluminum capacitor having anode foil anodized in an aqueous phosphate solution US6808615B2
B. Melody, J. Kinard, D. Persico, C. Stolarski, P. Lessner, Q. Chen, K. Pritchard, A. Harrington, D. Wheeler, Protecting resin-encapsulated components US6798645B2
J. Piller, P. Lessner, R. Hahn, C. Eppes, K. Pritchard, ESR of solid electrolytic capacitors using conductive polymer cathodes US6798644B1
B. Melody, J. Kinard, D. Wheeler, P. Lessner, Non-aqueous electrolytes and method for anodizing US6755959B2
P. Lessner, A.Harrington, B. Melody, J. Kinard, Edge formation process for aluminum solid electrolytic capacitor US6744621B2
D. Persico, P. Lessner, A. Harrington, L. Sayetta, Edge formation process for aluminum solid electrolytic capacitor US6707663B2
P. Lessner, P. Fernstrom, B. Melody, J. Kinard, Method of applying masking material US6605314B2
D. Persico, P. Lessner, A. Harrington, L. Sayetta, Edge formation process for aluminum solid electrolytic capacitor US6562652B2
P. Lessner, A. Harrington, B. Melody, J. Kinard, Edge formation process without anodizing for aluminum solid electrolytic capacitor US6548324B2
J. Kinard, B. Melody, P. Lessner, A. Harrington, D. Wheeler, E. Reed, D. Stenziner, Method of anodizing aluminum capacitor foil for use in low voltage, surface mount capacitors US6540900B1
A. Harrington, B. Melody, J. Kinard, P. Lessner, D. Wheeler, Method of aqueous anodizing aluminum substrates of solid capacitors US6475368B2
P. Lessner, B. Melody, J. Kinard, E. Reed, A. Harrington, D. Persico, D. Wheeler, Surface mount aluminum capacitor having anode foil anodized in an aqueous phosphate solution US6459565B1
B. Melody, J. Kinard, D. Wheeler, P. Lessner, Non-aqueous electrolytes for anodizing US6436268B1
B. Melody, J. Kinard, A. Harrington, D. Wheeler, Method of and electrolyte for anodizing aluminum substrates for solid capacitors US6409905B1
P. Lessner, T. Su, b. Melody, J. Kinard, V. Rajasekaran, Process of preparing a solid electrolytic capacitor containing a conductive polymer counter electrode US6391379B1
J. Kinard, B. Melody, D. Wheeler, P. Lessner, Method and electrolyte for anodizing valve metals to high voltage US6346185B1
P. Lessner, R. Hahn, B. Melody, E. Reed, J. Kinard, Aging process for solid electrode capacitor US6334945B1
R. Hahn, P. Lessner, B. Melody, J. Kinard, Chemical oxidative preparation of conductive polymers US6334966B1
B. Melody, J. Kinard, P. Lessner, Differential anodization process for electrolytic capacitor anode bodies US6261434B1
R. Hahn, P. Lessner, V. Rajasekaran, Process for improving leakage and dissipation factor of solid electrolytic capacitors employing conductive polymer cathodes US6191013B1
B. Melody, J. Kinard, P. Lessner, Method and electrolyte for anodizing valve metals US6149793
P. Lessner, T. Su, R. Hahn, V. Rajasekeran, Preparation of conductive polymers from stabilized precursor solutions US6136372
D. Wheeler and P. Lessner, Capacitor with conductive polymer US6136176
R. Hahn, P. Lessner, V. Rajasekaran, Electrolytic capacitor with improved leakage and dissipation factor US6072694
P. Lessner, T. Su, R. Hahn, V. Rajasekeran, Preparation of conductive polymers from stabilized precursor solutions US6056899
P. Lessner, T. Su, R. Hahn, V. Rajasekeran, Preparation of conductive polymers from stabilized precursor solutions US6001281
J. Kinard, B. Melody, P.Lessner, Polyaniline solutions with bicyclic terpene solvent US5948234
J. Kinard, B. Melody, P. Lessner, Electrolyte for anodizing valve metals US5935408
B. Melody, J. Kinard, P. Lessner, Doped polyaniline solutions US5919401
P. Lessner, J. Kinard, B. Melody, Conductive polymer using self-regenerating oxidant US5916627
J. Kinard, B. Melody, P.Lessner, Polyaniline solutions with bicyclic terpene solvent US5888582
B. Melody, J. Kinard, P. Lessner, Doped polyaniline solutions US5885650
B. Melody, J. Kinard, P. Lessner, Doped polyaniline solutions US5853794
J. Kinard, B. Melody, P. Lessner, Method for anodizing valve metals US5837121