Eric S Li

US Patent:

6537668, Mar 25, 2003

Filed:

Oct 2, 1998

Appl. No.:

09/165513

Inventors:

Veerasamy Vijayen - Farmington Hills MN
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA

Assignee:

United Module Corporation, Inc. - San Francisco CA

International Classification:

G11B 572

US Classification:

428408, 428694 TC

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the sp carbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or âquasi-staticâ) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

6544627, Apr 8, 2003

Filed:

Aug 25, 2000

Appl. No.:

09/648341

Inventors:

Veerasamy Vijayen - Farmington Hills MN
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA

Assignee:

United Modular Corporation - Los Altos CA

International Classification:

B32B 900

US Classification:

428141, 428408, 428336

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the sp carbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or âquasi-staticâ) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

6740384, May 25, 2004

Filed:

Jan 29, 2003

Appl. No.:

10/354336

Inventors:

Vijayen Veerasamy - San Jose CA 95133
Manfred Weiler - D-018833 Elbersdorf, DE
Eric Li - Palo Alto CA 94306

International Classification:

G11B 572

US Classification:

428 655, 428408, 428336, 428694 TC, 360 9701, 360135

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the sp carbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or âquasi-staticâ) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

6805891, Oct 19, 2004

Filed:

Jan 23, 2003

Appl. No.:

10/350498

Inventors:

Veerasamy Vijayen - San Jose CA
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA

Assignee:

United Mobile Corporation - Los Altos CA

International Classification:

G11B 572

US Classification:

426336, 428408, 428694 TC

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the sp carbonâcarbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or âquasi-staticâ) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

7402350, Jul 22, 2008

Filed:

Aug 9, 2006

Appl. No.:

11/463575

Inventors:

Vijayen Veerasamy - San Jose CA, US
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA, US

Assignee:

Stormedia Texas, LLC - Tyler TX

International Classification:

G11B 5/706

US Classification:

4288475, 428800, 428846

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the spcarbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or “quasi-static”) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

7513215, Apr 7, 2009

Filed:

Aug 9, 2006

Appl. No.:

11/463577

Inventors:

Veerasamy Vijayen - Farmington Hills MN, US
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA, US

Assignee:

Stormedia Texas, LLC - Tyler TX

International Classification:

C23C 16/00

US Classification:

118723AN, 118723 FI

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the spcarbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or “quasi-static”) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

7544397, Jun 9, 2009

Filed:

Feb 6, 2004

Appl. No.:

10/773796

Inventors:

Vijayen Veerasamy - San Jose CA, US
Manfred Weiler - Elbersdorf, DE
Eric Li - Palo Alto CA, US

Assignee:

Stormedia Texas, LLC - Tyler TX

International Classification:

C23C 14/06
C23C 14/22
C23C 16/26
C23C 16/50
H05H 1/16
H05H 1/24
C23C 14/48
C23C 14/46
C23C 16/27

US Classification:

427525, 427562, 427577, 427571, 250424

Abstract:

The invention provides systems and methods for the deposition of an improved diamond-like carbon material, particularly for the production of magnetic recording media. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the spcarbon-carbon bonds which are found within a diamond crystal lattice. The material is also amorphous, providing a combination of short-range order with long-range disorder, and can be deposited as films which are ultrasmooth and continuous at thicknesses substantially lower than known amorphous carbon coating materials. The carbon protective coatings of the present invention will often be hydrogenated. In a preferred method for depositing of these materials, capacitive coupling forms a highly uniform, selectively energized stream of ions from a dense, inductively ionized plasma. Such inductive ionization is enhanced by a relatively slow moving (or “quasi-static”) magnetic field, which promotes resonant ionization and ion beam homogenization.

US Patent:

7570568, Aug 4, 2009

Filed:

Jan 13, 2005

Appl. No.:

10/585399

Inventors:

Eric Li - Milpitas CA, US

Assignee:

Silicon Core Technology, Inc. - Milpitas CA

International Classification:

G11B 7/00

US Classification:

369116, 369 5326

Abstract:

A writing current circuit () supplies a controlled electrical current to a laser diode () for recording data swiftly onto a DVD (). A plurality of thermometer code registers () respectively store numerical values. A current control register () receives a numerical value from one of the thermometer code registers (). Serial data specifies a sequence in which individual thermometer code registers () supply values to the current control register () thereby causing the writing current circuit () to supply a particular electrical current waveform to the laser diode (). A plurality of current sources () respectively receive a single output signal from the current control register () which activates or deactivates individual current sources () for supplying a particular quantity of current to the laser diode ().