Abstract: A high-density magneto-optical recording medium having excellent jitter properties is provided. A pattern-dependent shift of the length of a recorded mark does not occur even when a minute mark has increased sensitivity to a recording magnetic field. A magneto-optical recording medium has at least a displacement layer, a memory layer, and an auxiliary memory layer. A mark with a length up to the diffraction-limit of the optical system is recorded and read out. The magneto-optical recording medium includes an in-plane magnetization-inducing layer principally made of cobalt on the auxiliary memory layer.

Abstract: A domain-wall-displacement-type magnetooptical recording medium is provided in which a floating magnetic field from a surrounding portion that operates on a recording/reproducing portion is suppressed. The recording medium includes a displacement layer having a composition such that rare-earth-element sub-lattice magnetization is dominant at room temperature, a switching layer, a memory layer, and a magnetization compensation layer in which iron-family-element sub-lattice magnetization is dominant at room temperature, for suppressing generation of a stray magnetic field at a temperature near room temperature.

Abstract: Provided is an optical disk including: a substrate; a reflective layer laminated on the substrate; a recording layer laminated on the reflective layer; and a buffer layer formed between the substrate and the reflective layer, the buffer layer having a thermal conductivity lower than that of the reflective layer. The optical disk suppresses the deformation of the substrate due to heat or a stress caused upon film formation or by, for example, repeated recording and reproduction operations, and which is excellent in long-term stability.

Abstract: An increase in variation in resistance value resulting from a reduction in thickness of heaters is dealt with without increasing the manufacture costs of the print head, by allowing smaller ink droplets to be efficiently ejected. A setting for a pulse voltage is essentially varied depending on the ejection threshold energy of the head is employed so that optimum drive power conditions can be reasonably set over a range of varying resistance values resulting from differences among manufactured print heads. This provides a print head and a printing apparatus which can deal with an increase in differences among manufactured heads by allowing smaller ink droplets to be efficiently ejected without reducing the yield of manufactured print heads.

Abstract: An increase in variation in resistance value resulting from a reduction in thickness of heaters is dealt with without increasing the manufacture costs of the print head, by allowing smaller ink droplets to be efficiently ejected. A setting for a pulse voltage essentially varied depending on the ejection threshold energy of the head is employed so that optimum drive power conditions can be reasonably set over a range of varying resistance values resulting from differences among manufactured print heads. This provides a print head and a printing apparatus which can deal with an increase in differences among manufactured heads by allowing smaller ink droplets to be efficiently ejected without reducing the yield of manufactured print heads.

Abstract: A high-density magneto-optical recording medium having excellent jitter properties is provided. A pattern-dependent shift of the length of a recorded mark does not occur even when a minute mark has increased sensitivity to a recording magnetic field. A magneto-optical recording medium has at least a displacement layer, a memory layer, and an auxiliary memory layer. A mark with a length up to the diffraction-limit of the optical system is recorded and read out. The magneto-optical recording medium includes an in-plane magnetization-inducing layer principally made of cobalt on the auxiliary memory layer.

Abstract: An optimum drive energy for a print head is supplied over an extended period of time to provide consistently good image quality without troublesome operation by the user. Temperature of the print head is monitored while varying the drive energy. A threshold value of drive energy required for ink ejection is judged using the drive energy and temperature data. An optimum drive condition is determined on the basis of the threshold value and, when the determined drive condition is different from drive condition information stored in the ink jet print head, the drive energy supplied to the ink jet print head is changed.

Abstract: A domain-wall-displacement-type magnetooptical recording medium is provided in which a floating magnetic field from a surrounding portion that operates on a recording/reproducing portion is suppressed. The recording medium includes a displacement layer having a composition such that rare-earth-element sub-lattice magnetization is dominant at room temperature, a switching layer, a memory layer, and a magnetization compensation layer in which iron-family-element sub-lattice magnetization is dominant at room temperature, for suppressing generation of a stray magnetic field at a temperature near room temperature.

Abstract: A substrate for use of an ink jet recording head is provided with a plurality of heat generating members for generating thermal energy to be utilized for discharging ink. The heat generating members are structured by thin film formed by material represented by Tax Siy Rz, which has specific resistance value of 4000 &mgr;&OHgr;·cm or less, where R is one or more kinds of elements selected from among C, O, N, and x+y+z=100. With the structure thus arranged, the heat generating members make it possible to maintain the change of resistance values within a small amount even when used continuously for a long time, and provide recorded images in high quality with long life and reliability.

Abstract: Disadvantages relating to ink refill specific to an increase in a number of ink ejection openings in an ink jet print head is eliminated to provide a particularly excellent fast-response capability and ejection performance. More specifically, when an ink is supplied to a liquid chamber via an ink supply path and an ink supply opening formed in a support member and a print element substrate in a print head, and is then ejected from ejection openings, a pressure of an ink effected upon the ejection is transmitted to the ink supply path. This pressure, however, can be absorbed by air chambers via communication paths to reduce adverse effects of the pressure on ink refill in the liquid path after the ejection. In this case, since the air chambers and other components are structured to be closed with respect to the atmosphere, problems such as an increase in viscosity which are associated with communication of the air chambers and other components with the atmosphere can be prevented.

Abstract: A circuit board for an ink-jet recording head which ejects ink includes a plurality of electrothermal transducers for generating thermal energy which is used for ejecting ink; and a plurality of wiring electrodes for supplying electric power to the plurality of electrothermal transducers, the plurality of wiring electrodes each having a thickness of one of at least two values according to the length of each wiring electrode, whereby the resistance of the wiring electrodes are made uniform between each wiring electrode without significantly increasing the width of the wiring electrodes.

Abstract: At least a reproduction layer of a magneto-optical recording medium is formed by sputtering using a processing gas comprising Kr or Xe as a main component. Hence, it is possible to reduce the dependence of saturation magnetization MS on temperature, thereby decreasing the influence of a demagnetizing field and a floating magnetic field over a wide range of temperature.

Abstract: There is provided a magneto-optic recording medium which suits the DWDD readout method and enables stable formation of domains even when ultramicromarks are recorded. The magneto-optic recording medium has a memory layer and a switching layer as magnetic films and, when produced, conditions for forming the magnetic films are so surveyed that the product of saturation magnetization Ms and coercive force Hc, MsHc, is maximized. An MsHc (106 erg/cc) of the memory layer is 15.8 (T/Tc−1) or more where temperature is represented by T (K) and Curie temperature of the memory layer by Tc (K).

Abstract: A substrate for use in an ink jet recording head includes a plurality of heat generating resistive members formed on the substrate, a wiring pattern formed to be electrically connected with the heat generating resistive members, and a protection film formed on the heat generating resistive members and the wiring pattern to protect them from ink, and then, a vertically turn-up wiring structure is formed with an insulation film formed on the substrate, and one side of the wiring connected with the heat generating resistive members is arranged immediately below the heat generating resistive members in a width and a length larger than that of heat generating resistive members with the insulation film between them. For this substrate, the heat generating resistive members and the wiring positioned immediately below them are formed by polysilicon having impurities in different densities.

Abstract: A substrate for use of an ink jet recording head is provided with a plurality of heat generating members for generating thermal energy to be utilized for discharging ink. The heat generating members are structured by thin film formed by material represented by Tax Siy Rz, which has specific resistance value of 4000 &mgr;&OHgr;·cm or less, where R is one or more kinds of elements selected from among C, O, N, and x+y+z=100. With the structure thus arranged, the heat generating members make it possible to maintain the change of resistance values within a small amount even when used continuously for a long time, and provide recorded images in high quality with long life and reliability.

Abstract: Disadvantages relating to ink refill specific to an increase in a number of ink ejection openings in an ink jet print head is eliminated to provide a particularly excellent fast-response capability and ejection performance. More specifically, when an ink is supplied to a liquid chamber via an ink supply path and an ink supply opening formed in a support member and a print element substrate in a print head, and is then ejected from ejection openings, a pressure of an ink effected upon the ejection is transmitted to the ink supply path. This pressure, however, can be absorbed by air chambers via communication paths to reduce adverse effects of the pressure on ink refill in the liquid path after the ejection. In this case, since the air chambers and other components are structured to be closed with respect to the atmosphere, problems such as an increase in viscosity which are associated with communication of the air chambers and other components with the atmosphere can be prevented.

Abstract: A substrate for use of an ink jet recording head comprises a plurality of heat generating resistive members formed on the substrate, a wiring pattern formed to be electrically connected with the heat generating resistive members, and a protection film formed on the heat generating resistive members and the wiring pattern to protect them from ink, and then, a vertically turn-up wiring structure is formed with an insulation film formed on the substrate, and one side of wiring connected with the heat generating resistive members is arranged immediately below the heat generating resistive members in a width and a length larger than those of heat generating resistive members with the insulation film between them. For this substrate, the heat generating resistive members and the wiring positioned immediately below them are formed by polysilicon having impurities in different densities.

Abstract: A substrate for use in an ink jet recording head is provided with a plurality of heat generating members for generating thermal energy to be utilized for discharging ink. The heat generating members are structured by a thin film formed by material represented by Tax Siy Rz, which has a specific resistance value of 4000 &mgr;&OHgr;·cm or less, where R is one or more kinds of elements selected from/among C, O, N, and x+y+z=100. With the structure thus arranged, the heat generating members make it possible to maintain the change of resistance values within a small amount even when used continuously for a long time, and provide recorded images of high quality with long life and reliability.

Abstract: Disadvantages relating to ink refill specific to an increase in a number of ink ejection openings in an ink jet print head is eliminated to provide a particularly excellent fast-response capability and ejection performance. More specifically, when an ink is supplied to a liquid chamber via an ink supply path and an ink supply opening formed in a support member and a print element substrate in a print head, and is then ejected from ejection openings, a pressure of an ink effected upon the ejection is transmitted to the ink supply path. This pressure, however, can be absorbed by air chambers via communication paths to reduce adverse effects of the pressure on ink refill in the liquid path after the ejection. In this case, since the air chambers and other components are structured to be closed with respect to the atmosphere, problems such as an increase in viscosity which are associated with communication of the air chambers and other components with the atmosphere can be prevented.

Abstract: In the present invention, a processing liquid and an ink are ejected so that ejected regions of the processing liquid ejected in each scan by a printing head and image regions printed by black (Bk) ink printed in each scan are mutually shifted in an auxiliary scanning direction. By this, when ejection of the processing liquid is to be performed in each scan, the image region of the Bk ink ejected on the processing liquid in the preceding scan is offset from a boundary of the region, to which the processing liquid is to be ejected. Therefore, overlapping of the processing liquid on the portion where the Bk ink and the processing liquid are overlapped in the preceding scan, can be avoided. Accordingly, when printing is performed by ejecting the ink and the processing liquid which makes a coloring agent in the ink insoluble, drop-out or deterioration of color due to overlap of the processing liquid in the joint portion of the image formed in each scan by the printing head can be eliminated.