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| Number | Title | Issue Date |
| 7408634 | Automated imaging with phosphorescent imaging targets The present invention discloses a system and method for providing an automated imaging system comprising an illumination source, a phosphorescent imaging target, and an optical imaging sensor for receiving luminance information emitted from the phosphorescent imagin... | 08/05/2008 |
| 7262067 | Method for conductive film quality evaluation A method for monitoring copper film quality and for evaluating the annealing efficiency of a copper annealing process includes measuring hardness of a copper film formed on a substrate before and after annealing and comparing the hardness measurement results. The me... | 08/28/2007 |
| 5285439 | High density ced data storage M-ary angle modulation is used to record digital data at high density on a disk. In one embodiment, data symbols are encoded by assigning each data symbol a phase representation in terms of a carrier signal, the disk is physically altered in such a manner... | 02/08/1994 |
| 4918678 | Disc reproducing system for compensating mechanical imperfections Means for reducing the effects of vertical perturbations of a phonograph disc surface resulting from disc and/or playback system mechanical imperfections. Such imperfections are compensated by closed loop and/or open loop means wherein the deviations of t... | 04/17/1990 |
| 4881217 | Method of making optically recorded information medium by exposure to ultraviolet light The present invention relates to a method of making an optically recorded information medium which permits the reduction of the number of the processing steps and the reproduction of the recorded medium at a reasonable cost and in large quantities. The me... | 11/14/1989 |
| 4821250 | Process and apparatus for the recording of an information signal A process and an apparatus are specified for recording a digital signal onto a recording carrier (4), in particular a signal for recording in compact disc data format, in which an engraving or cutting stylus (2) is pressed substantially by dead weight alo... | 04/11/1989 |
| 4802156 | Cutting machine for pits on CD master A cutting machine for cutting pits on a laser disc master comprising a disc signal source with a RAM and a series of shift registers; a machine unit having a servo-rotary shaft for mounting a master disc; a servo-horizontally moving shaft perpendicular to... | 01/31/1989 |
| 4663753 | Recording medium and method of making the same A method is disclosed for recording information wherein an information-containing surface relief image is mechanically micromachined into a recording medium formed of a copper/oxygen amalgam containing 8 to 11 atomic weight percentage of oxygen and having... | 05/05/1987 |
| 4525827 | Apparatus for removing a cut chip by suction A device for removing a chip produced during cutting of information into a record carrier, particularly a metallic record carrier, wherein the cut chip is removed by means of suction air and the magnitude or pressure of this suction air is controlled in d... | 06/25/1985 |
| 4488282 | Damping material A cured multi-component epoxy composition made from a high molecular weight diglycidyl ether of bisphenol A, a second diglycidyl ether, a high molecular weight polyamide-amine curing agent, and an accelerator, is an excellent damping material and can be u... | 12/11/1984 |
| 4488283 | Epoxy resin An epoxy composition derived from tetraglycidated methylene dianiline cured with a methylated maleic acid adduct of phthalic anhydride has a high glass-transition temperature and a low curing temperature and when cured has very high bond strength. This ep... | 12/11/1984 |
| 4484320 | Apparatus and method for cutting information into a metallic record carrier Apparatus for recording an information signal on a metallic record carrier. The information is impressed on the carrier by cutting a groove therein by means of a stylus, the groove being characterized at each point by a slope or modulation pitch angle. Th... | 11/20/1984 |
| 4477892 | Surface acoustic wave device having a pyramid shaped tip for recording video information on a substrate A surface acoustic wave recording device is constructed for use in recording video signals in the surface of a master substrate. The device includes a pyramidal-shaped tip having a plurality of transducer electrodes for launching surface acoustic waves on... | 10/16/1984 |
| 4453242 | Surface acoustic wave cutterhead for disc recording having a circular transducer A surface acoustic wave record stylus is constructed from a support having a surface for propagating surface acoustic waves. A circular-shaped interdigital transducer launches the surface acoustic waves onto the support surface. The shape of the interdigi... | 06/05/1984 |
| 4434481 | Traveling wave surface acoustic wave transducer A multi-electrode array deposited on a piezoelectric substrate is driven by a traveling-wave voltage generated from a wave delay generating device, such as a tapped coaxial cable. Suitably delayed and phased voltages are fed to each electrode in the array... | 02/28/1984 |
| 4402072 | Video disc mastering using gimballed air puck A gimballed air puck is used in a video disc mastering system for controlling the depth to which an electromechanical stylus cuts into a metal substrate surface. Air is directed through the air puck toward the substrate surface to maintain the cutting sty... | 08/30/1983 |
| 4359768 | Vertical tracking angle meter Measuring instrument which extracts and directly displays the vertical tracking angle of a phonograph pickup during playback of a known test record signal, and which also has the capability of measuring and directly displaying tracing distortion.... | 11/16/1982 |
| 4357633 | Engraving apparatus and method An engraving head incorporates a shaft which is supported for high frequency oscillation by axially spaced metal spring elements, and the shaft is acted upon by improved dampening means to minimize undesirable transverse and transient vibrations. A diamon... | 11/02/1982 |
| 4349902 | Piezoelectric transducer for recording video information A cutterhead assembly suitable for forming a topographic signal representative pattern in a recording media, such as a disc substrate, is constructed having a base member, a piezoelectric element and a cutting stylus. The piezoelectric element in this str... | 09/14/1982 |
| 4348754 | Digital delay for high quality audio use A disk mastering preview system utilizes an original audio signal from an audio source for previewing signals to be recorded by a disk lathe. Delayed audio signals corresponding to the original audio signals are produced for recording by the disk lathe a ... | 09/07/1982 |
| 4317192 | Head suspension velocity control apparatus for electromechanical recorder A diamond stylus for electromechanically recording short wavelength video signal information in a metal disc master is supported in a cutterhead suspension apparatus. A set of parallel spring steel suspension members are used to mount a cutting stylus ass... | 02/23/1982 |
| 4310915 | Dual parallelogram cutterhead suspension apparatus A cutting stylus assembly for electromechanically recording short wavelength video signal information in a metal master is supported in a cutterhead suspension apparatus. In the suspension head apparatus the cutting stylus assembly is supported by an air ... | 01/12/1982 |
| 4295216 | Apparatus for measuring the characteristics of a wideband electromechanical recording system having a transformer A monitoring circuit for monitoring and measuring the mechanical characteristics of a piezoelectric video disc recording cutterhead takes the form of a bridge network. The motional charge or motional current, which are related to the mechanical characteri... | 10/13/1981 |
| 4281407 | Surface acoustic wave pickup and recording device A surface acoustic wave (SAW) pickup and record stylus is constructed from an elongated substrate which supports the propagation of SAW. The substrate is tapered to a tip at one end and a fan-shaped interdigital electrode structure having curved fingers i... | 07/28/1981 |
| 3946149 | Apparatus for embossing information on a disc An apparatus for receiving electronic signals and embossing modulated grooves on a carrier medium as a function of the received signals, includes a support for supporting an embossing assembly and a carrier medium in spaced relationship therewith, as well... | 03/23/1976 |
| 3938810 | Center hole formation in an information storing disc A video disc having signal information stored in a spiral groove, has a center hole formed by creating a closed convolution of predetermined diameter concentrically to said spiral groove and removing the disc material within this closed convolution.... | 02/17/1976 |
