公开(公告)号：DE69032479T2

公开(公告)日：1999-01-28

申请号：DE69032479

申请日：1990-11-30

Applicant: XEROX CORP

Inventor： CHIANG ANNE ,  HUANG TIAO-YUAN ,  ELROD SCOTT A ,  OKI TAKAMASA JOHN ,  HADIMIOGLU BABUR ,  WU I-WEI

IPC: H01L21/822 ,  H01L27/04 ,  H01L29/93 ,  H01L29/94

Abstract: A semiconductor varactor, such as a thin film poly-Si varactor, has larger effective gate areas in accumulation than in depletion, together with a capacitive switching ratio which is essentially determined by the ratio of its effective gate area in accumulation to its effective gate area in depletion. To that end, such a varactor has a fully depletable active semiconductor layer (42), such as a thin poly-Si film, and is constructed so that at least a part of its active layer is sandwiched between a relatively thin dielectric layer (44) and a relatively thick dielectric layer (43). The thin dielectric layer (44), in turn, is sandwiched between the active semiconductor layer (42) and a gate electrode (46). Furthermore, one or more ground electrodes (45) are electrically coupled to laterally offset portions of the active semiconductor layer (42) in partial overlapping alignment with the gate electrode. In keeping with this invention, the capacitance per unit surface area of the thin dielectric layer (44) is so much greater than the capacitance per unit surface area of the thick dielectric layer (43) that the series capacitance of the depleted active semiconductor layer (42) and the thick dielectric layer (43) negligibly contribute to the capacitance of the varactor when it is operating in its depletion mode.

公开(公告)号：DE60031607T2

公开(公告)日：2007-02-08

申请号：DE60031607

申请日：2000-07-13

Applicant: XEROX CORP

Inventor： ROY JOY ,  HADIMIOGLU BABUR ,  ELLSON RICHARD N ,  SPRAGUE ROBERT ,  KRUGER JAMES B ,  LENNON JOHN

IPC: B41J2/01 ,  B41J11/00

Abstract: An apparatus 30 for ink-jet printing on a recording medium 34 is provided which includes the steps of jetting aqueous ink drops 40 on the recording medium 34 (paper) in the form of an image. The aqueous ink used is a slow-drying (high-surface tension) ink 20 which does not penetrate the paper/paper fibers 34 for a relatively long time. Prior to penetration of the paper/paper fibers 34, the water in the droplet is quickly evaporated from the ink while still resident on the paper surface. The evaporation process is substantially completed prior to an additional liquid ink 20 being jetted 40 onto the same or adjoining location of the recording medium. The evaporation is rapid enough to prevent the resident ink from substantially migrating/wicking to any adjacent location or into the recording medium. Further drying energy (52, 54) is transferred to the resident ink spots from the same direction as the printheads ensuring less energy requirement.

公开(公告)号：DE69029964D1

公开(公告)日：1997-03-27

申请号：DE69029964

申请日：1990-10-31

Applicant: XEROX CORP

Inventor： QUATE CALVIN F ,  HADIMIOGLU BABUR ,  RAWSON ERIC G

IPC: B41J2/015 ,  B41J2/14 ,  B41J2/385 ,  G10K11/30 ,  H04R1/34 ,  B41J2/04 ,  G10K11/34

Abstract: Acoustic radiators which are focused diffractively by multi-discrete-phase binary Fresnel lenses are provided for applications, such as acoustic ink printing. Standard semiconductor integrated circuit techniques are available for fabricating such lenses in compliance with design specifications having relatively tight tolerances, including specifications for integrated lens arrays demanding substantial precision in the relative spatial positioning of several lenses. The diffractive performance of these lenses simulate concave refractive lenses, even though the lenses preferably have generally flat geometries. To that end, the lenses advantageously are defined by patterning acoustically flat surfaces, such as an acoustically flat face of a substrate or, better yet, an acoustically flat face of a layer of etchable material which is grown or otherwise deposited on an acoustically flat surface of an etch resistant substrate.

公开(公告)号：DE69032479D1

公开(公告)日：1998-08-20

申请号：DE69032479

申请日：1990-11-30

Applicant: XEROX CORP

Inventor： CHIANG ANNE ,  HUANG TIAO-YUAN ,  ELROD SCOTT A ,  OKI TAKAMASA JOHN ,  HADIMIOGLU BABUR ,  WU I-WEI

IPC: H01L21/822 ,  H01L27/04 ,  H01L29/93 ,  H01L29/94

Abstract: A semiconductor varactor, such as a thin film poly-Si varactor, has larger effective gate areas in accumulation than in depletion, together with a capacitive switching ratio which is essentially determined by the ratio of its effective gate area in accumulation to its effective gate area in depletion. To that end, such a varactor has a fully depletable active semiconductor layer (42), such as a thin poly-Si film, and is constructed so that at least a part of its active layer is sandwiched between a relatively thin dielectric layer (44) and a relatively thick dielectric layer (43). The thin dielectric layer (44), in turn, is sandwiched between the active semiconductor layer (42) and a gate electrode (46). Furthermore, one or more ground electrodes (45) are electrically coupled to laterally offset portions of the active semiconductor layer (42) in partial overlapping alignment with the gate electrode. In keeping with this invention, the capacitance per unit surface area of the thin dielectric layer (44) is so much greater than the capacitance per unit surface area of the thick dielectric layer (43) that the series capacitance of the depleted active semiconductor layer (42) and the thick dielectric layer (43) negligibly contribute to the capacitance of the varactor when it is operating in its depletion mode.

公开(公告)号：DE69029964T2

公开(公告)日：1997-05-28

申请号：DE69029964

申请日：1990-10-31

Applicant: XEROX CORP

Inventor： QUATE CALVIN F ,  HADIMIOGLU BABUR ,  RAWSON ERIC G

IPC: B41J2/015 ,  B41J2/14 ,  B41J2/385 ,  G10K11/30 ,  H04R1/34 ,  B41J2/04 ,  G10K11/34

Abstract: Acoustic radiators which are focused diffractively by multi-discrete-phase binary Fresnel lenses are provided for applications, such as acoustic ink printing. Standard semiconductor integrated circuit techniques are available for fabricating such lenses in compliance with design specifications having relatively tight tolerances, including specifications for integrated lens arrays demanding substantial precision in the relative spatial positioning of several lenses. The diffractive performance of these lenses simulate concave refractive lenses, even though the lenses preferably have generally flat geometries. To that end, the lenses advantageously are defined by patterning acoustically flat surfaces, such as an acoustically flat face of a substrate or, better yet, an acoustically flat face of a layer of etchable material which is grown or otherwise deposited on an acoustically flat surface of an etch resistant substrate.

公开(公告)号：DE60040318D1

公开(公告)日：2008-11-06

申请号：DE60040318

申请日：2000-07-14

Applicant: XEROX CORP

Inventor： ROY JOY ,  WEISBERG MICHAEL C ,  ELKIN JERRY ,  HADIMIOGLU BABUR

IPC: B41J2/04 ,  B41J2/175 ,  B41J2/015 ,  B41J2/045 ,  B41J2/055 ,  B41J2/14

公开(公告)号：DE60031607D1

公开(公告)日：2006-12-14

申请号：DE60031607

申请日：2000-07-13

Applicant: XEROX CORP

Inventor： ROY JOY ,  HADIMIOGLU BABUR ,  ELLSON RICHARD N ,  SPRAGUE ROBERT ,  KRUGER JAMES B ,  LENNON JOHN

IPC: B41J2/01 ,  B41J11/00

Abstract: An apparatus 30 for ink-jet printing on a recording medium 34 is provided which includes the steps of jetting aqueous ink drops 40 on the recording medium 34 (paper) in the form of an image. The aqueous ink used is a slow-drying (high-surface tension) ink 20 which does not penetrate the paper/paper fibers 34 for a relatively long time. Prior to penetration of the paper/paper fibers 34, the water in the droplet is quickly evaporated from the ink while still resident on the paper surface. The evaporation process is substantially completed prior to an additional liquid ink 20 being jetted 40 onto the same or adjoining location of the recording medium. The evaporation is rapid enough to prevent the resident ink from substantially migrating/wicking to any adjacent location or into the recording medium. Further drying energy (52, 54) is transferred to the resident ink spots from the same direction as the printheads ensuring less energy requirement.

公开(公告)号：JP2001030475A

公开(公告)日：2001-02-06

申请号：JP2000210782

申请日：2000-07-12

Applicant: XEROX CORP

Inventor： ROY JOY ,  HADIMIOGLU BABUR ,  ELLSON RICHARD N ,  SPRAGUE ROBERT ,  KRUGER JAMES B ,  LENNON JOHN

IPC: B41J2/01 ,  B41J11/00

Abstract: PROBLEM TO BE SOLVED: To prevent an optical density of printed matters from decreasing and prevent papers from being seen through too much when seen from a non print side which is caused by letting a quick drying ink permeate into papers. SOLUTION: An apparatus 30 for executing ink jet printing to a recording medium 34 is provided. The recording includes printing heads 40, 42, 44 and 46 for emitting aqueous ink liquid drops in the shape of images onto the recording medium 34 (paper). Aqueous ink to be used is a slow drying (high surface tension) ink which will not permeate in the paper/paper fiber 34 for a relatively long time. Moisture in the liquid drops are rapidly evaporated by dryers 52 and 54 while the ink is present at a surface of the paper before permeating into the paper/paper fiber 34.