Patents by Inventor Stefan Seifried

Stefan Seifried has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Conductive stud for magnetic recording devices and method of making the same
    Patent number: 7336445
    Abstract: A magnetic recording device makes use of an “anchored” conductive stud which is securely attached within its surrounding insulator materials. The conductive stud is formed over a conductive layer which is coupled to or part of a read or a write head element of the magnetic recording device. The conductive stud has a top stud portion and a bottom undercut portion formed over the conductive layer. In one illustrated embodiment, the bottom undercut portion has a width that is greater than the width of the top stud portion. Since an insulator is formed around the conductive stud and over its bottom undercut portion, a secure coupling between the conductive stud and the conductive layer is provided. Preferably, the conductive layer is made of copper (Cu), the conductive stud is made of gold (Au), and the insulator is alumina (Al2O3). A seed layer may be formed between the conductive stud and the conductive layer. A method of making the conductive stud using a photolithography process is also disclosed.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: February 26, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Rainer Klaus Krause, Jan Marien, Johannes Thomas Paul, Gunther Wilhelm Sandmann, Gerhard Anton Scherb, Hubert Erwin Schuy, Stefan Seifried
  • Conductive stud for magnetic recording devices and method of making the same
    Publication number: 20060114610
    Abstract: A magnetic recording device makes use of an “anchored” conductive stud which is securely attached within its surrounding insulator materials. The conductive stud is formed over a conductive layer which is coupled to or part of a read or a write head element of the magnetic recording device. The conductive stud has a top stud portion and a bottom undercut portion formed over the conductive layer. In one illustrated embodiment, the bottom undercut portion has a width that is greater than the width of the top stud portion. Since an insulator is formed around the conductive stud and over its bottom undercut portion, a secure coupling between the conductive stud and the conductive layer is provided. Preferably, the conductive layer is made of copper (Cu), the conductive stud is made of gold (Au), and the insulator is alumina (Al2O3). A seed layer may be formed between the conductive stud and the conductive layer. A method of making the conductive stud using a photolithography process is also disclosed.
    Type: Application
    Filed: January 4, 2006
    Publication date: June 1, 2006
    Inventors: Rainer Krause, Jan Marien, Johannes Paul, Gunther Sandmann, Gerhard Scherb, Hubert Schuy, Stefan Seifried
  • Method of making conductive stud for magnetic recording devices
    Patent number: 7020959
    Abstract: Methods of making a magnetic recording device with an “anchored” conductive stud which is securely attached within its surrounding insulator materials. The conductive stud is formed over a conductive layer which is coupled to or part of a read or a write head element of the magnetic recording device. The conductive stud has a top stud portion and a bottom undercut portion formed over the conductive layer. In one illustrated embodiment, the bottom undercut portion has a width that is greater than the width of the top stud portion. Since an insulator is formed around the conductive stud and over its bottom undercut portion, a secure coupling between the conductive stud and the conductive layer is provided. Preferably, the conductive layer is made of copper (Cu), the conductive stud is made of gold (Au), and the insulator is alumina (Al2O3). A seed layer may be formed between the conductive stud and the conductive layer.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: April 4, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Rainer Klaus Krause, Jan Marien, Johannes Thomas Paul, Gunther Wilhelm Sandmann, Gerhard Anton Scherb, Hubert Erwin Schuy, Stefan Seifried
  • Single slider air bearing process using polymer brush formation
    Patent number: 6844144
    Abstract: A method of constructing an air bearing on a single slider used as a support for a magnetic recording head is described. A recessed surface of the air bearing is constructed by: applying a polymerization initiator (preferably azomonochlorsilane), forming a pattern in the initiator, forming a polymer brush, and ion milling. The application of the polymerization initiator may be from solution or by stamping.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: January 18, 2005
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Rainer Klaus Krause, Markus Schmidt, Stefan Seifried, Wolfgang Egert, Eva Urlaub, Ashok Lahiri
  • Conductive stud for magnetic recording devices and method of making the same
    Publication number: 20040109258
    Abstract: A magnetic recording device makes use of an “anchored” conductive stud which is securely attached within its surrounding insulator materials. The conductive stud is formed over a conductive layer which is coupled to or part of a read or a write head element of the magnetic recording device. The conductive stud has a top stud portion and a bottom undercut portion formed over the conductive layer. In one illustrated embodiment, the bottom undercut portion has a width that is greater than the width of the top stud portion. Since an insulator is formed around the conductive stud and over its bottom undercut portion, a secure coupling between the conductive stud and the conductive layer is provided. Preferably, the conductive layer is made of copper (Cu), the conductive stud is made of gold (Au), and the insulator is alumina (Al2O3). A seed layer may be formed between the conductive stud and the conductive layer. A method of making the conductive stud using a photolithography process is also disclosed.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Inventors: Rainer Klaus Krause, Jan Marien, Johannes Thomas Paul, Gunther Wilhelm Sandmann, Gerhard Anton Scherb, Hubert Erwin Schuy, Stefan Seifried
  • Single slider air bearing process using polymer brush formation
    Publication number: 20040043335
    Abstract: A method of constructing an air bearing on a single slider used as a support for a magnetic recording head is described. A recessed surface of the air bearing is constructed by: applying a polymerization initiator (preferably azomonochlorsilane), forming a pattern in the initiator, forming a polymer brush, and ion milling. The application of the polymerization initiator may be from solution or by stamping.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 4, 2004
    Inventors: Rainer Klaus Krause, Markus Schmidt, Stefan Seifried, Wolfgang Egert, Eva Urlaub, Ashok Lahiri
  • Write head for magnetic recording having a corrosion resistant high aspect coil and a method of manufacture
    Publication number: 20030218831
    Abstract: The present invention provides for a write head used in magnetic recording. The write head has at least one coil and the turns in the coil may have a high aspect ratio allowing the head to be used in high density, high data rate applications. Voids in the spaces between turns are avoided by partially removing a photoresist layer before a protective layer overcoat is applied.
    Type: Application
    Filed: May 21, 2002
    Publication date: November 27, 2003
    Inventors: Rainer Klaus Krause, Marion Hejny, Stefan Seifried, Markus Schmidt, Manfred Ebert