Position Sought   Consulting on Magnetic Recording, Magnetic Systems, Optics, and Physics

 

Degrees    Ph.D., California Institute of Technology, 1972, High Energy Physics

S.B.,  Massachusetts Institute of Technology, 1966, Physics

 

Major Career Accomplishments

 

• Awarded 160 issued patents

• Published 55 technical publications  

• Awarded the 2013 IEEE Magnetics Society Achievement Award

• Invented the Shielded Pole perpendicular write head which is in all disk drives (USPat. #4,656,546)

• Conceived of Lower Bit Aspect Ratios for higher capacity disk drives (see publications [15] & [22])

• Invented the Diamond inductive head ( more than 40,000,000 shipped, USPat. #5,184,267)

• Invented spherical aberation correction for 2 Photon Recording on thick media (USPat. #7,593,305)

 

Contact     mikemallary@comcast.net

4 Osgood Rd, Sterling, Ma. 01564  | 978-422-9689 (home)  |  412-736-4606 (cell)

 

Experience

 

Senior Technologist, Western Digital Corporation, San Jose, Ca., 2009 to 9/27/13

• Led the Microwave Assisted Magn. Rec. project which produced Spin Torque Oscillators and did micromagnetic simulations that predicted 3Tb/in2 (patents pending, USPat. #8,456,967 & [2])

• Worked with the HAMR team  to improve performance and reliability (patents pending)

• Developed and used code for Two Dimensional Magnetic Recording (patents pending)

• Used  SPICE model to analyze reader electronic signal/noise to extend TuMR (patent pending)

 

Principal Technologist, Seagate Technology, Pittsburgh, Pa., 2006 to 2009

• Performed HAMR FDTD optical simulations of NFTs and did FEM simulations of write poles

• Initiated the investigation of gold alloys for NFT reliability

• Studied recessed poles for reduced negative field gradient in HAMR [4]

• Initiated analytic studies of NFT temperature rise resulting in an effective heat sinking design

• Participated in HAMR head reliability studies and testing in dry N2 (USPat. #6,765,379)

• Performed micromagnetic and FEM simulations of Shingled  Magnetic Recording

• Led the 2 Photon Volumetric Optical Recording project using pulsed Blue Ray lasers

• Invented spherical aberration compensator for thick 2 photon media (USPat. #7,593,305)

 

Senior Member of Technical Staff, Maxtor Corporation, Shrewsbury, Ma, 2001 to 2006

• Led the theory group on the development and productization of Perpendicular Recording

• Coached vendors on manufacturing the Shielded Pole head (USPat. # 4,656,546 & see below)

• Did experiments on the performance and reliability of drives including thermal fly height adjustment
  ([13], USPats.#7,310,194, #7,362,534, #7,403,356, #7,477,470)

• Submitted many Shielded Pole patents  to protect expiring IP (USPats. #6,813,106, #6,842,313, #7,075,756, #7,511,921, #7,573,683, #7,620,722, #7,732,069, #7,729,092, and #8,365,393)

• Explained observed high speed writer switching with spin wave damping [5], [6], [8], & [16]

  

Quantum Fellow, Quantum Corporation & MKQC, Shrewsbury, Ma., 1994 to 2001

• Led theory group in predicting the 1Tb/in2 Perpendicular Magnetic Recording density limit [14]

• Conducted experiments and theoretical studies of thermal stability

• Initiated the National Storage Industry Consortium advocacy of low bit aspect ratios for higher data
  density with a presentation at an Extraordinarily High Density Recording meeting[15] & [22]

• Experiemtally and theoretically verified Sharrock’s law from 270 hours down to 0.4 ns [7] & [20]

• Program Committee & Session Chair for 1997 Intermag &1999, 2000, 2001, 2002 MMM Conf.

• Wrote the heads chapter in “The Physics of Ultra High Density Magnetic Recording”  [15]

• Performed FEM of write poles and micromagnetic analysis of the write and read processes

• Invented an on disk log file architecture for high performance Shingled Magnetic Recording 

• Invented asperity avoiding system features for improved head reliability (USPat. #6,567,229)

• Consulted on Terastor HAMR design (USPats. #6,236,513, #6,351,436, and #6,430,123)

 

Senior Consultant Engineer, Digital Equipment Corporation, Shrewsbury, Ma., 1980 to 1994  

• Invented, proved (with analytic calculations and customized FEM code), fabricated, and patented (#4,656,546) the Shielded Pole write head which is used in every disk drive today

• Invented the Diamond head which doubles the number of effective turns with 2 yoke turns through the
  coil, (>40,000,000 shipped, USPats. #5,184,267, #5,195,005, and #5,267,112)

• Invented variable track and bit density  in drives (USPats. #6.957,379 and #6,966,225)

• Invented the standard P2 masking of P1 for the track trimming process (USPat. #5,267,112)

• Chaired the $12,000,000 NSIC ATP10Gb/in2 Heads Project during the proposal phase

• Conceived of rotational flux conduction without wall motion (TFHs work at high frequency [34])

• Conceived of and proved the  flux beaming phenomena in uniaxial magnetic materials [33]

• Led the Thin Film Head theory group

• Was Program Committee member & Session Chair for the 1986 & 1988 Intermag Conferences

• Led the effort to identify the source and eliminate magnetic erasure in the R82 disk drive

 

Senior Research Engineer, Magnetic Corporation of America, Waltham, Ma., 1978 to 1980  

• Designed superconductive and conventional magnets for:  Magneto Hydro Dynamic power generation; Magnetic Resonance Imaging; Magnetic Separation; Energy Storage;  and Free Electron Lasers

• Wrote an accepted DOE proposal for a 5 ton/hr Magnetic Separator to reduce sulfur in coal

• Conducted experiments in magnetic separation of coal, copper, gold, and kaolin clay

• Invented an inexpensive magnetite based ferrofluid activated by AC magnetic fields

• Invented an inductive particle separator for recycling nonmagnetic metals

• Invented a high discharge rate superconducting magnetic energy storage system

 

Assistant Professor, Northeastern University Physics Department, Boston, Ma., 1974 to 1978

• Wrote and used code for Montecarlo simulations supporting the Fermi Lab proposal for experiments 439 which found early evidence for the 5th quark and analyzed the data

• Built a 300 ton solid iron magnets for experiments 365 and 439

• Taught courses in electronics and wave/resonance phenomena

 

Research Associate, Rutherford High Energy Research Laboratory, Oxfordshire, U.K., 1972 to 1974

• Designed shielding for a large magnetic spectrometer.

• Designed the optical systems for the spark chambers of a CERN experiment

• Wrote pattern recognition software in 3D for analyzing digitization of spark chamber images.