The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2010
Filed:
Jan. 11, 2005
Michael Andrew Parker, Fremont, CA (US);
Mustafa Pinarbasi, Morgan Hill, CA (US);
Robert Otto Schwenker, San Jose, CA (US);
Michael Andrew Parker, Fremont, CA (US);
Mustafa Pinarbasi, Morgan Hill, CA (US);
Robert Otto Schwenker, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
The present invention is directed towards increasing the conductivity of the electrical lead material in the read head portion of a magnetic head, such that thinner electrical leads can be fabricated while the current carrying capacity of the leads is maintained. This increase in electrical lead conductivity is accomplished by fabricating the electrical lead upon an epitaxially matched seed layer, such that the crystalline microstructure of the electrical lead material has fewer grain boundaries, whereby the electrical conductivity of the lead material is increased. In a preferred embodiment, the electrical lead material is comprised of Rh, which has an FCC crystal structure, and the seed layer is comprised of a metal, or metal alloy having a BCC crystal structure with unit cell lattice constant dimensions that satisfy the relationship that ais approximately equal to 0.816a. In various embodiments, the seed layer is comprised of VMo or VW.