Michael Mallary

In June 2019, Mallary was interviewed by Grant Saviers and Tom Yamashita as part of the Computer History Museum Oral History Series.

In 2013, Mallary received the IEEE Magnetics Society Achievement Award for "sustained contributions to thin film magnetic recording write head designs; most notably for the invention of the shielded write head structure for perpendicular recording".

In 2009, Mallary joined Western Digital in San Jose working on advanced recording technologies including Heat-Assisted Magnetic Recording (HAMR) and Microwave Assisted Magnetic Recording (MAMR).

In 2009, Mallary was selected as a Magnetics Society Distinguished Lecturer and gave presentations worldwide with the title "The Evolution and Revolutions in Disk Drive Recording".

In 2007, Mallary was elevated to IEEE Fellow for "for contributions to recording devices".

Mallary is the author of a book and a video on cosmology and evolution entitled “Our Improbable Universe: A Physicist Considers How We Got Here” first published in 2004 with a second edition in 2018. The book details how highly tuned (and hence improbable?) are the various constants that determine our physical universe. The book then goes on to examine evolution and society from a similar perspective.

Mallary wrote the chapter that details the operation and design of magnetic recording heads in The Physics of Ultra High Density Magnetic Recording, a book edited by M. Plumer, J. van Ek, and D. Weller published in 2001.

From the early 1990s to 2008, Mallary worked for a succession of HDD companies including Rocky Mountain Magnetics, MKE, Quantum, Maxtor, and Seagate working mainly on head design but also on manufacturing aspects such as servowriting. It was during this period that he became involved with the International Storage Industry Consortium (INSIC) on the Extra High Density Recording (EHDR) project working with Mason Williams, Mark Kryder, Dave Thompson and others. The need for continued increases in areal data density led to an intense focus on perpendicular recording which offered the potential of areal-densities up to 1 Terabit per square inch. Earlier at DEC, Mallary had invented the trailing shield (or shielded-pole) write head for perpendicular recording. This design is able to reach higher recording areal-densities because it provides higher field gradients and more advantageous field angles than a conventional monopole head (see diagram). Perpendicular recording technology is presently used in all hard disk drives and Mallary's trailing-shield head design is ubiquitous.

In 1980, Mallary joined Digital Equipment Corporation (DEC) in Shrewsbury, Massachusetts as a head modeler and designer to support their effort to produce thin film heads for the RA90 disk drive. Bob Rottmayer was the head of the group. At DEC Mallary came up with the idea of the so-called "Diamond Head". This novel approach basically wrapped the yoke around the coil twice - effectively doubling the number of turns. (Maximizing readback voltage is always of paramount importance. This inductive head design was widely deployed, but it was eventually upstaged by the advent of magnetoresistive heads).

In 1974, Mallary joined the Magnetic Corporation of America in Waltham, Massachusetts designing large superconducting magnets intended for nuclear fusion, high energy physics, magnetic separation, power generation, etc.

From 1972-1974, Mallary was a post doctoral fellow at Rutherford Laboratory.

Mallary received the S.B. degree in physics from the Massachusetts Institute of Technology, Cambridge, in 1966 working under John King. He received his Ph.D. degree from the California Institute of Technology in 1971 writing a thesis on high-energy physics under the direction of Prof Frank J. Sciulli.