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 Expert  717746

Expert in Magazine Record Heads, Media and Drives

Available for your Consulting and Expert Witness Needs

California (CA)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise:

Listed with other top experts in: 

A significant portion of Expert's career has been spent on hard disks and hard disk technology, including both particulate and metallic magnetic coatings. His experience includes the magnetics of disk coatings, their testing and measurement, and the head disk interface. It includes establishing magnetic disk design parameters as well as recording performance prediction. He is familiar with almost all of the processes in disk manufacturing, including spin coating, orientation, polishing, sputtering, and plating, as well as most of the mechanical measurements required (profilometry, acceleration, flying height).

computer disk


hard disk


hard-disk technology

A significant portion of Expert's career has been spent on disk drives, mostly hard disk drives. However, he is also familiar with floppy disk drives and many of their problems. Most of his experience has been with heads, disks, the head disk interface, and with read/write systems, including electronics, data codes, error rate prediction, and performance criteria. He has designed state-of-the-art disk drives, and worked on them as a R/W engineer in design, planning, and troubleshooting and "fixing" problem products. He has published several papers on drive error rate prediction and R/W concepts. For several years he has maintained predictions on disk drive markets and anticipated needs.

disk drive


disk drive design


hard disk drive

A significant portion of Expert's career has been spent working on magnetic recording heads, and most recently on thin-film heads. He has been fortunate to work with two of the most successful, thin-film head development groups and has acquired a significant amount of processing and development knowledge and experience. He is also quite familiar with the application and testing of magnetic recording heads of all types, specifically including ferrite, MIG, and thin-film. He is also knowledgeable in the magnetics of most materials used in heads of all types today. He has had experience with audio, video, digital, and flying heads in manufacturing, test, and drive design.

magnetic recording head


thin-film head

A significant portion of Expert's early career in magnetic recording was spent in magnetic recording tape research and development. The basic coating formulation materials are still the same with most of the improvements coming in new particles and thin coating techniques. Floppy disks are a hybrid between tape media and a disk application. He has kept abreast of most of the significant improvements in tape and tape recording materials, since several of his first papers were on tape and particle orientation. He also developed a digital amplitude reference tape for testing in a manufacturing environment. He also participated in a group attempting to establish archival standards for tape storage.

magnetic data storage material


magnetic recording tape


magnetic tape data storage


archival system

Magnetic recording read/write circuitry requires a significant background in magnetic recording theory and practice, high speed analog and digital circuitry (most of what would be known as electronic engineering), low noise circuitry, and specialized filters (both active and passive). A knowledge of magnetic media characteristics (signals, noise, error sources, and defects), effects of external noise sources and fields is needed, as well as their effect on drive error rate. He has worked in the R/W area in design, development, and fixed problem drives, as well as published papers on R/W theory and error rate prediction.


electronics engineering


magnetic record


magnetic recording read/write system

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: San Jose, California;  San Francisco, California;  Sacramento, California;  Oakland, California;  Stockton, California;  Fremont, California;  Modesto, California;  Salinas, California;  Santa Rosa, California;  and Hayward, California.

Year   Degree   Institution  
1968   PhD   Electrical Engineering - University of Santa Clara  
1961   MS   Electrical Engineering - University of New Mexico  
1958   BS   Electrical Engineering - Montana State University  

Work History:
Years   Employer   Title  

1989 to


(Undisclosed Consulting Company)



1987 to 1989


Unisys Corporation


Principal Engineer


1982 to 1987


Burroughs Corporation


Principal Scientist


1978 to 1982


Memorex Corporation


Principal Scientist


1967 to 1978


Memorex Corporation


Senior Staff Engineer


Career Accomplishments:

Expert is a member of the Institute of Electrical and Electronics Engineers, and also the Magnetics Society of IEEE. Expert is also a member of Tau Beta Pi, Phi Kappa Phi, and Phi Eta Sigma.

Professional Appointments

He is past Chairman of San Fransisco Magnetics Society Chapter.

Publications and Patents Summary

He is the author of 14 scientific publications and holds one U.S. patent.

Selected Publications and Publishers  
 - IEEE Transactions on Magnetics, Institute of Electrical and Electronics Engineers (IEEE)  

Consulting Services:
Recent Client Requests:
  • Expert in Wight Light Profilometer - industry applications advice is required.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.


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