US Patent No: 8,164,858

Number of patents in Portfolio can not be more than 2000

Read head having conductive filler in insulated hole through substrate




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A novel read head includes a substrate having a trailing face and a leading face opposite the trailing face. The substrate includes a first hole therethrough that extends continuously from the trailing face to the leading face. The read head also includes a read transducer disposed on the trailing face, and a first plurality of electrically conductive trailing connection pads disposed on the trailing face. A first insulative layer is disposed on an inner surface of the first hole. A first electrically conductive filler is disposed in the first hole but is insulated from the substrate by the first insulative layer. A first electrically conductive leading connection pad is disposed on the leading face and is electrically connected to the first conductive filler.

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Patent Owner(s)

Patent OwnerAddressTotal Patents

International Classification(s)

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Inventor Name Address # of filed Patents Total Citations
I, Gusti Made Subrata Bangkok, TH 2 62
Moravec, Mark D Gilroy, US 18 522
Pumkrachang, Santi Bangkok, TH 2 62

Cited Art Landscape

Patent Info (Count) # Cites Year
Other [Check patent profile for assignment information] (1)
5,200,869 Flying type thin film magnetic head having a transducing element 17 1991
7,006,330 Head stack assembly including a ground conductive pad for grounding a slider to a gimbal 51 2003
7,027,264 Slider with a slider ground pad electrically connected to write head poles and read head shields 40 2003
7,535,676 Slider with bonding pads opposite the air bearing surface 6 2004
2006/0181,808 Compact thin-film magnetic head and magnetic disk drive using the same 3 2006
2007/0047,144 Magnetic head slider and suspension for magnetic head 5 2006
6,757,135 Leading edge bond pads 9 2001
7,254,885 Wafer-level fabrication method for top or side slider bond pads 3 2002
* 7,929,248 Top bond pad for transducing head interconnect 16 2006
6,349,017 Magnetic head suspension assembly using bonding pads of a slider to an attachment surface of a flexure 78 1997
* 5,896,248 Bond pads for metal welding of flexure to air bearing slider and grounding configuration thereof 45 1997
6,125,014 Via-less connection using interconnect traces between bond pads and a transducer coil of a magnetic head slider 41 1998
6,796,018 Method of forming a slider/suspension assembly 51 2001
6,947,258 UV curable and electrically conductive adhesive for bonding magnetic disk drive components 128 2002
5,530,604 Electrical connection and slider-suspension assembly having an improved electrical connection 54 1994
7,307,816 Flexure design and assembly process for attachment of slider using solder and laser reflow 37 2001
5,068,759 Thin film magnetic head of small size capable of certainly and stably connecting lead wires 24 1990
* 5,124,864 Magnetic head supporting device including a flexible member of polymeric resinous material 40 1990
* 5,126,901 Thin film magnetic head having a narrow upper surface 16 1990
* 5,384,432 Two-layered tape lead wire for magnetic head 26 1993
* 4,761,699 Slider-suspension assembly and method for attaching a slider to a suspension in a data recording disk file 170 1986
4,789,914 Thin film magnetic read-write head/arm assemblies 95 1986
Hutchinson Technology Incorporated (1)
* 5,914,834 Head suspension assembly with electrical interconnect by slider bond pads and gimbal bonding zones 41 1997
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
9,343,084 Systems and methods for correcting slider parallelism error using compensation lapping 0 2012
9,387,568 Systems and methods for correcting fabrication error in magnetic recording heads using magnetic write width measurements 0 2013
9,242,340 Method to stress relieve a magnetic recording head transducer utilizing ultrasonic cavitation 0 2013
9,093,102 Systems and methods for tuning seed layer hardness in components of magnetic recording systems 1 2013
8,929,180 Energy-assisted magnetic recording device having laser driving signal and magnetic write signal sharing same electrical conductor 0 2013
8,976,491 Disk drive head suspension distal non-op shock limiter with branched arms 0 2013
8,797,691 Disk drive head suspension with a single piezoelectric element adhered to rotary-actuated and non-actuated portions of a structural layer of a tongue of a laminated flexure 30 2013
9,315,008 Method and apparatus for aligning an illumination unit to a slider for a magnetic recording device 0 2013
9,070,387 Integrated heat-assisted magnetic recording head/laser assembly 1 2013
9,293,157 Automated active feedback slice and view milling of magnetic head cross-sections 0 2013
9,135,935 Customized head gimbal assembly bonding skew angle for adjusting two-dimensional magnetic recording reader alignment 0 2013
8,934,199 Disk drive head suspension tail with bond pad edge alignment features 3 2014
9,064,513 Disk drive suspension assembly with flexure having dual conductive layers with staggered traces 1 2014
9,105,282 Head gimbal assembly carrier with adjustable protective bar 0 2014
9,230,580 Suspension assembly having a microactuator grounded to a flexure 0 2014
9,449,631 Slider for magnetic recording system 0 2015
9,171,561 Assemblies and methods for slider electrical connection containing through circuit electrical connections 0 2014
Western Digitatl (Fremont), LLC (1)
9,431,037 Systems and methods for monitoring the power of a light source utilized in energy-assisted magnetic recording 0 2013
8,756,795 Method for manufacturing a read head having conductive filler in insulated hole through substrate 29 2012
8,988,830 Air bearing design to mitigate lube waterfall effect 0 2013
9,099,145 High contrast alignment marker 0 2014
9,361,916 Electrical lapping guide for dimensional control of back side of heat assisted magnetic recording device 0 2014
9,431,044 Slider having shock and particle resistance 0 2014
9,372,078 Detecting thickness variation and quantitative depth utilizing scanning electron microscopy with a surface profiler 0 2014
9,165,579 Air bearing area configuration for reducing flying height hump across a stroke 0 2014
9,042,048 Laser-ignited reactive HAMR bonding 1 2014
9,257,138 Slider assembly and method of manufacturing same 0 2014
9,183,859 HAMR writer pole length characterization 0 2014
9,190,089 Air bearing area configuration for contaminating particle removal 0 2014
9,190,090 Multi step lube blocking air bearing area configuration 0 2014
9,202,478 Method and structure for soldering a laser submount to a mounting face of a slider 0 2015
9,171,562 Patterned metal layer to control solder connection between laser and submount in a magnetic head 0 2015
9,368,139 Slider back side etching to increase shear strength between suspension and slider 0 2015
* Cited By Examiner

Maintenance Fees

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7.5 Year Payment $3600.00 $1800.00 $900.00 Oct 24, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 Oct 24, 2023
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Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00