Abstract: Systems and methods for storing waveform data and outputting data to a waveform viewer are disclosed. A waveform is segmented into a plurality of segments, and data describing each segment is stored at several levels of resolution. When a user wishes to view a portion of the waveform, the appropriate segments of the waveform are identified, and the appropriate levels of resolution are selected. The data describing the appropriate segments at the appropriate levels of resolution are output to a waveform viewer. An index may be provided to aid in selection of the appropriate data. Various methods for compression of the data are also supported.

Abstract: An extension to a simulator (801) that allows the user to specify real numbers, voltages, and currents (808) on ports of an electrical net is presented. The computer using the analog wire functionality routines (805), the routines for determining nets (804), the net manager (803), and the pin manager (802) resolves unspecified values on said electrical nets. The user may specify at least one value on said port and may specify whether said port is driven. The extension includes additional math functions (1901).

Abstract: A design specifications-driven platform (100) for analog, mixed-signal and radio frequency verification with one embodiment comprising a client (160) and server (150) is presented. The server comprises an analog verification database (110), a code and document generator (1020), a design to specifications consistency checker (103), a symbol generator (104), a coverage analyzer (105), a server interface (106), a web server (111), and an analog verification server application (101). The client comprises a web browser (130), generated datasheets and reports (120), generated models, regression tests, netlists, connect modules, and symbols (121), generated simulation scripts (122), a client interface (124), design data (131), simulators (132), and a design data extractor (123).

Abstract: Write head coils for magnetic disk systems are commonly formed through electroplating onto a seed layer in the presence of a photoresist mask. It is then necessary to remove the seed layer everywhere except under the coil itself. The present invention achieves this through etching in a solution of ammonium persulfate to which has been added the complexing agent 1,4,8,11 tetraazundecane. This suppresses the reduction of Cu++ to Cu, thereby increasing the dissolution rate of copper while decreasing that of nickel-iron. Two ways of implementing this are described—adding the complexing agent directly to the ammonium persulfate and introducing the 1,4,8,11 tetraazundecane through a dipping process that precedes conventional etching in the ammonium persulfate.

Abstract: A read track width defining layer is employed for defining first and second side edges of a read sensor. The read track width defining layer preferably remains in the head to planarize the read head at first and second hard bias and lead layers so as to overcome a problem of write gap curvature in an accompanying write head. The read track width defining layer is defined by a subtractive process about a bilayer photoresist layer. The subtractive process is selective to the read track width defining layer over a read sensor material layer therebelow. Ion milling is then employed for defining first and second side edges of a read sensor layer employing the read track width defining layer as a mask. First and second hard bias and lead layers are then deposited which make contiguous junctions with the first and second side edges of each of the read sensor and read track width defining layers. The photoresist is then removed and the remainder of the read head is completed.

Abstract: Write head coils for magnetic disk systems are commonly formed through electroplating onto a seed layer in the presence of a photoresist mask. It is then necessary to remove the seed layer everywhere except under the coil itself. The present invention achieves this through etching in a solution of ammonium persulfate to which has been added the complexing agent 1,4,8,11 tetraazundecane. This suppresses the reduction of Cu++ to Cu, thereby increasing the dissolution rate of copper while decreasing that of nickel-iron. Two ways of implementing this are described—adding the complexing agent directly to the ammonium persulfate and introducing the 1,4,8,11 tetraazundecane through a dipping process that precedes conventional etching in the ammonium persulfate.

Abstract: A method of making a magnetic head that has a read head with a track width includes the steps of depositing a read track width defining material layer on a read sensor material layer; forming a bi-layer photoresist mask on the read track width defining material layer that masks a read track width defining layer portion of the read track width defining material layer; removing by reactive ion etching (RIE) a portion of the read track width defining material layer not masked by the photoresist mask to form the read track width defining layer portion with exposed first and second side edges that are spaced apart a distance equal to the track width; removing by ion milling a first portion of the read sensor material layer not masked by the read track width defining layer portion to form a second portion of the read sensor material layer with exposed first and second side edges that have a width equal to the track width; depositing hard bias and lead material layers on the photoresist mask in contact with the firs

Abstract: Write head coils for magnetic disk systems are commonly formed through electroplating onto a seed layer in the presence of a photoresist mask. It is then necessary to remove the seed layer everywhere except under the coil itself. The present invention achieves this through etching in a solution of ammonium persulfate to which has been added the complexing agent 1,4,8,11 tetraazundecane. This suppresses the reduction of Cu++ to Cu, thereby increasing the dissolution rate of copper while decreasing that of nickel-iron. Two ways of implementing this are described—adding the complexing agent directly to the ammonium persulfate and introducing the 1,4,8,11 tetraazundecane through a dipping process that precedes conventional etching in the ammonium persulfate.

Abstract: A read track width defining layer is employed for defining first and second side edges of a read sensor. The read track width defining layer preferably remains in the head to planarize the read head at first and second hard bias and lead layers so as to overcome a problem of write gap curvature in an accompanying write head. The read track width defining layer is defined by a subtractive process about a bilayer photoresist layer. The subtractive process is selective to the read track width defining layer over a read sensor material layer therebelow. Ion milling is then employed for defining first and second side edges of a read sensor layer employing the read track width defining layer as a mask. First and second hard bias and lead layers are then deposited which make contiguous junctions with the first and second side edges of each of the read sensor and read track width defining layers. The photoresist is then removed and the remainder of the read head is completed.

Abstract: Described are chemical compositions comprising a fluorinated solvent and a nonionic, poly-fluoroalkyl, hydroxy-substituted surfactant.

Abstract: A method for making a magnetic head slider having a protective coating on the rails thereof, the protective coating containing a thin adhesion layer, a thin layer of amorphous hydrogenated carbon, and a thin masking layer. The protective coating is deposited on the air bearing surface of the slider after the thin film magnetic heads are lapped to a chosen dimension, but before the pattern of rails is produced on the air bearing surface. The protective coating protects the magnetic head during the rail fabrication process and in usage in a magnetic recording system protects the magnetic head from wear and corrosion damage.

Abstract: A magnetic head slider having a protective coating on the rails thereof, the protective coating comprising a thin adhesion layer, a thin layer of amorphous hydrogenated carbon, and a thin masking layer. The protective coating is deposited on the air bearing surface of the slider after the thin film magnetic heads are lapped to a chosen dimension, but before the pattern of rails is produced on the air bearing surface. The protective coating protects the magnetic head during the rail fabrication process and in usage in a magnetic recording system protects the magnetic head from wear and corrosion damage.

Abstract: A back rest is movably supported on a wall behind a toilet in a manner whereby in one position the back rest is above the toilet and free therefrom and rests against the wall and in another position the back rest is over the raised toilet lid in juxtaposition therewith and supports the back of a user of the toilet.