Inventor
WERNER DOUGLAS JOHNSON
US25 patents
⚠️ This page may combine multiple inventors who share the name “WERNER DOUGLAS JOHNSON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
16 patentsUS6219212B1Apr 17, 2001
Magnetic tunnel junction head structure with insulating antiferromagnetic layer
IBM145 citations98
US5805391ASep 8, 1998
Write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height
IBM124 citations98
US5696656ADec 9, 1997
Highly sensitive orthogonal spin valve read head
IBM54 citations96
US6504689B1Jan 7, 2003
Tunnel junction read head with flux guide coupled to and magnetically extending a recessed free layer to an air bearing surface
IBM21 citations92
US6029339AFeb 29, 2000
Method of making write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height
IBM34 citations92
US5828530AOct 27, 1998
Orthogonal spin valve sensor with reduced net field
IBM41 citations92
US5653013AAug 5, 1997
Two terminal single stripe orthogonal MR head
IBM30 citations92
US5761013AJun 2, 1998
Apparatus for simultaneous write head planarization and lead routing
IBM17 citations89
US5894385AApr 13, 1999
Highly sensitive magnetoresistive sensor with a series flux guide
IBM13 citations74
US6570743B1May 27, 2003
Read head with high and low resistance lead layers wherein the high resistance lead layers are connected to a read sensor and extend perpendicular from an air bearing surface (abs) of the read head beyond a back recessed edge of the sensor where the high resistance lead layers are connected to the low resistance layers
IBM10 citations73
US6176005B1Jan 23, 2001
Method of making read head with improved lead layers
IBM11 citations73
US6085406AJul 11, 2000
Method of making a read head with improved lead layers at an air bearing surface
IBM14 citations73
US7204014B2Apr 17, 2007
Magnetic head with thin gap layers
IBM3 citations63
US6913870B2Jul 5, 2005
Fabrication process using a thin liftoff stencil formed by an image transfer process
IBM3 citations62
US6707647B2Mar 16, 2004
Magnetic head with thin gap layers
IBM1 citations52
US6430011B1Aug 6, 2002
Read head with improved lead layers at an air bearing surface
IBM1 citations52
HITACHI GLOBAL STORAGE TECH
5 patentsUS6861177B2Mar 1, 2005
Method of forming a read sensor using a lift-off mask having a hardmask layer and a release layer
HITACHI GLOBAL STORAGE TECH19 citations92
US7297470B2Nov 20, 2007
Image transfer process for thin film component definition
HITACHI GLOBAL STORAGE TECH6 citations68
US7555828B2Jul 7, 2009
Method for manufacturing a read sensor for a magnetoresistive head
HITACHI GLOBAL STORAGE TECH6 citations61
US7531907B2May 12, 2009
System and method for forming serial numbers on HDD wafers
HITACHI GLOBAL STORAGE TECH1 citations46
US7465532B2Dec 16, 2008
Image transfer process for thin film component definition
HITACHI GLOBAL STORAGE TECH0 citations46
HGST Netherlands BV
2 patentsUS9236069B2Jan 12, 2016
Method for making a current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with reduced-width self-aligned top electrode
HGST Netherlands BV1 citations52
US8988833B2Mar 24, 2015
Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with reduced-width top and bottom electrodes and method for making
HGST Netherlands BV0 citations41