| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360323000 | Electrostatic Discharge (ESD) protection | 12 |
| 20080259506 | ESD, cross talk and noise pickup minimizing scheme for CPP and TMR devices - A slider mounted CPP GMR or TMR read head sensor is protected from electrostatic discharge (ESD) damage and from noise and cross-talk from an adjacent write head by means of a balanced resistive/capacitative shunt. The shunt includes highly resistive interconnections between upper and lower shields of the read head and a grounded slider substrate and a low resistance interconnection between the lower pole piece of the write head and the substrate. The capacitances between the pole piece and the upper shield, the upper shield and the lower shield and the lower shield and the substrate are made equal by either forming the shields and pole piece with equal surface areas and separating them with dielectrics of equal thicknesses, or by keeping the ratio of area to insulator thicknesses equal. | 10-23-2008 |
| 20080273278 | MULTI-PORT CABLE FOR REMOVABLE ESD/EOD PROTECTION FOR ELECTRONIC DEVICES - A protective device for protecting an electronic device, e.g., MR head, from ESD/EOS damage includes a cable having leads coupled to the electronic device and a first port providing access to the leads. A second port with one-to-one electrical connection to each lead in the cable provides a second electrical access to the all leads. A shorting device is coupled to one of the ports thereby creating a short between both the leads of the extension and the leads of the cable. The other port is available for coupling to an external device, e.g., tester or end device while the short provides ESD/EOS protection. | 11-06-2008 |
| 20080310055 | REPEATABLE SHORTING AND UNSHORTING OF MICRO-ELECTRICAL CIRCUITS - The present invention provides methods and systems for repeatably creating and severing a short circuit to protect an electronic component from ESD. A short circuit may be formed between read sensor pads of a read sensor by depositing a shorting material on a magnetic head using a Laser Induced Forward Transfer (LIFT) process. The short circuit may be unshorted using a laser scan configured to sever the shorting material. In one embodiment, a shorting station may be provided to prevent spreading of the shorting material to undesired areas of the electronic component. | 12-18-2008 |
| 20090059440 | DATA INTEGRITY MANAGEMENT RESPONSIVE TO AN ELECTROSTATIC EVENT - The disclosure is related to detecting an electrostatic charge at a data storage device. The electrostatic charge can be detected and a data integrity management process can be implemented. In a particular embodiment, a method includes monitoring an electronic device having a data storage medium for an electrostatic event. The method also includes selectively performing a data integrity management process on the data storage medium when the electrostatic event is detected. | 03-05-2009 |
| 20090086382 | System and method for changing resonant frequency in hard disk drive components - A post manufacturing inventory system to improve disk drive inventory after manufacturing are disclosed. One embodiment provides a computer system having serial number scanning capabilities to scan manufactured disk drive during a post manufacturing inventory count to reconcile with a drive count during manufacturing. In addition, a count verifier is coupled to the scanning unit to enable the inventory control system to verify real-time information read from the disk drives during inventory with pre-stored information pertaining to each drive. | 04-02-2009 |
| 20090154031 | DIODE SHUNTING FOR ELECTROSTATIC DISCHARGE PROTECTION IN A HARD DISK DRIVE MAGNETIC HEAD - The present invention provides a electrostatic discharge protection device for protecting giant magnetoresistive devices in hard disk drive from being damaged by transient current generated as a result of electrostatic discharge. Embodiments of the invention include pair of surface mount diodes that are connected back-to-back and connected to the shunting pads of a head gimbal assembly in parallel to the giant magnetoresistive device protect the giant magnetoresistive device from transient current generated by the electrostatic discharge. | 06-18-2009 |
| 20090168262 | Magnetic head design having reduced susceptibility to electrostatic discharge from media surfaces - Methods and structures for the fabrication of a thin film, longitudinal and perpendicular recording heads are disclosed. The heads comprise a plurality of embedded static dissipative layers that extend a few nanometers from the air bearing surface. These extended layers are first to contact the magnetic media surface and drain any electric charge buildup before a damaging discharge occurs with read or write head components. The embedded static dissipative layers are particularly useful for use in heads utilizing thermal fly height control systems, which tend to increase the probability of damaging electrical discharge through critical head components. | 07-02-2009 |
| 20090180216 | SHUNT FOR MAGNETORESISTIVE TRANSDUCER HEADS FOR ELECTROSTATIC DISCHARGE PROTECTION - A magnetoresistive transducer head assembly includes a reader element, a writer element and a high impedance shunt electrically connecting the reader element and the writer element. The high impedance shunt provides a high impedance conductive path for maintaining electrostatic charge equipotential between the reader element and the writer element. | 07-16-2009 |
| 20120033332 | LOW VISCOSITY ELECTROSTATIC DISCHARGE (ESD) DISSIPATING ADHESIVE - In one embodiment, a system includes a cable comprising a plurality of leads and an ESD dissipating adhesive coupled to the plurality of leads in a coverage area for providing ESD protection to an element of an electronic device. The ESD adhesive comprises a mixture of a polymeric thin film and electrically conductive fillers dispersed in the film, and the ESD adhesive has a resistivity from about 50 to 100 MΩ. In another embodiment, a method for providing ESD protection to an element of an electronic device includes applying an ESD adhesive across exposed leads of a cable and evaporating the solvent from the ESD adhesive. At least some of the leads are coupled to an element of an electronic device. The ESD adhesive comprises a polymeric thin film, electrically conductive fillers dispersed in the polymeric thin film, and a solvent for controlling a viscosity of the ESD adhesive. | 02-09-2012 |
| 20140347766 | PROTECTION OF DEVICE FROM ELECTROSTATIC DISCHARGE (ESD) DAMAGE - Embodiments of the invention relate to electrostatic discharge (ESD) protection. One embodiment includes a first dissipative adhesive (DA) connected to at least a portion of multiple leads in a first plane of a flexible cable in a coverage area for providing ESD protection to at least one element of an electronic device. A common bus bar is connected to the leads in a second plane of the flexible cable. Conductivity of the common bus bar is greater than conductivity of the first DA and the first plane and the second plane are different planes of the flexible cable. | 11-27-2014 |
| 20160140987 | FLEXIBLE CIRCUIT WITH PARTIAL GROUND PATH - A head assembly for a magnetic tape storage device includes a head and a flexible circuit connected to the head. The flexible circuit includes a gripping portion, an end including electrical contacts for the head, conductors extending from the electrical contacts, and ink patterned onto the electrical contacts and gripping portion to form electrical paths therebetween. The ink conducts electrostatic charge from the electrical contacts and conductors to a grounded user in response to skin of the user contacting the ink. | 05-19-2016 |
| 20160148628 | ELECTROSTATIC DISCHARGE PROTECTION FOR A MAGNETORESISTIVE SENSOR - A magneto-resistive (MR) sensor protection circuit is disclosed, for the protection of an MR sensor. The MR sensor may have a safe operating voltage range, a normal operating voltage range within the safe operating voltage range, and two terminals coupled to a read channel circuit, including a positive terminal and a negative terminal. The MR sensor protection circuit may have positive and negative protection threshold voltage ranges. The MR sensor protection circuit may also have a plurality of N-channel field-effect transistors (NFETs) that are coupled to the positive terminal and to the negative terminal, and configured to, in response to a voltage between the two terminals being within either the positive or the negative protection threshold voltage range, limit the voltage between the terminals by shunting current between the positive terminal and the negative terminal. | 05-26-2016 |
