Browse Prior Art Database

Ta-W Alloys for MR Conductor Leads

IP.com Disclosure Number: IPCOM000103509D
Original Publication Date: 1990-Dec-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 24K

Publishing Venue

IBM

Related People

Howard, JK: AUTHOR [+2]

Abstract

In the conventional magnetoresistive (MR) sensor design, the current-carrying conductors are often exposed to the environment during operation. This exposure has put stringent requirements on the mechanical strength and corrosion resistance of the lead materials.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Ta-W Alloys for MR Conductor Leads

      In the conventional magnetoresistive (MR) sensor design, the
current-carrying conductors are often exposed to the environment
during operation.  This exposure has put stringent requirements on
the mechanical strength and corrosion resistance of the lead
materials.

      Ta-W alloy films with composition of 50% to 80% Ta have been
shown to have adequate properties for this application. The
electrical resistivity is in the range of 28-32 micro-ohm-cm, the
mechanical hardness is about 22-25 GPa, and the corrosion resistance
is similar to that of Ta. These alloy films have completely solid
solution, single phase BCC structure, which is stable against thermal
annealing at 250oC up to 100 hours.

      Disclosed anonymously.