公开(公告)号：JPH09207171A

公开(公告)日：1997-08-12

申请号：JP1672896

申请日：1996-02-01

Applicant: SONY CORP

Inventor： TOMITA TAKASHI

IPC: B29C45/26 ,  B29L17/00

Abstract: PROBLEM TO BE SOLVED: To enable the injection molding of a plurality of molded products at the same time by operating a punch toward the central part of a molded product on the side of a movable mold in a mold clamping direction to open a hole having a predetermined diameter. SOLUTION: A second punch 37 cooperates with the circular receiving blade of an intermediate movable mold 20 while traverses a cavity Cb to circularly punch the resin of the central part of the optical disk substrate molded within the cavity Cb to form a center hole to the optical disk substrate. Further, the rear surface of a first punch 22 is pressed by the leading end part of the second punch 37 through the resin of the central part of the punched optical disk substrate and the leading end part of the first punch 22 cooperates with the circular receiving blade of a sprue core 15 while traverses a cavity Ca to clrcularly punch the resin of the central part of the optical disk substrate molded within the cavity Ca to form a center hole to the optical disk substrate.

公开(公告)号：JPH09120590A

公开(公告)日：1997-05-06

申请号：JP27452995

申请日：1995-10-23

Applicant: SONY CORP

Inventor： TOMITA TAKASHI

IPC: B29C45/70 ,  B29C45/26 ,  B29L17/00 ,  G11B7/26

Abstract: PROBLEM TO BE SOLVED: To improve the transferability of pits and grooves to a substrate by controlling the mold clamping pressure by moving the injection speed of a synthetic resin material or metal mold during the injection of the synthetic resin material forming the substrate of an optical disk into the metal mold. SOLUTION: The metal mold 5 in which a stamper for forming the pits and grooves on the substrate is set is used. The metal mold 5 is constituted by butting the upper mold 5a and the lower mold 5b against each other. The stamper is set between the upper mold 5a and the lower mold 5b and the cavity 5c to be packed with the transparent synthetic resin material, such as polycarbonate, to be the material for the substrate is formed. The molten synthetic resin material is injected and filled into the cavity 5c by an injection cylinder 4 via the nozzle part 5d disposed projectingly in the upper mold 5a. The filling rate of the synthetic resin material is controlled or the mold clamping pressure is controlled by moving the lower mold 5b of the mold 5 in the filling work, by which various characteristics of the substrate, such as transferability of the pits and grooves to the substrate and bending characteristics, are well maintained.

公开(公告)号：JPH0973663A

公开(公告)日：1997-03-18

申请号：JP22440895

申请日：1995-08-31

Applicant: SONY CORP

Inventor： TOMITA TAKASHI ,  SHIMIZU JUN

IPC: G11B7/24 ,  G11B5/66

Abstract: PROBLEM TO BE SOLVED: To make it possible to lessen the occurrence of transfer defects by sticking a first substrate and a second substrate to each other via a light transparent film. SOLUTION: This multilayered optical disk is constituted by forming a first information layer on the first substrate 1 having a thickness of 0.6mm and a second information layer 12 on the second substrate 11 having a thickness of 0.6mm and sticking these substrates via the light transparent film 4 to each other. The light transparent film 4 is preferably formed the thickness of 20 to 100μm. The sufficient sepn. of the reflected light from the first information recording layer 2 and the reflected light from the second information recording layer 12 is no longer possible and the exact detection is difficult if the thickness is too small. Spherical aberrations, etc., arise if the thickness is too large and, therefore, the light transparent film needs be set at the adequate thickness by taking these points into consideration. The light transparent film is preferably polyethylene terephthalate, polycarbonate, etc.

公开(公告)号：JPH0877628A

公开(公告)日：1996-03-22

申请号：JP20695594

申请日：1994-08-31

Applicant: SONY CORP

Inventor： TOMITA TAKASHI

IPC: G11B7/24 ,  G11B7/007 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE: To facilitate the accurate tracking servo of an optical disc on which a reflective layer and/or a recording layer are/is formed by a method wherein the servo pits of the optical disc have pit lengths with which the space frequency sensitivity in a reproducing optical system is not less than 0.4. CONSTITUTION: Tracks in which data pits corresponding to information signals are arranged are concentrically or spirally provided on the surface of a transparent substrate 1 on the side where a recording part is formed. The tracks are divided into a plurality of data areas and pairs of servo pits 8a and 8b are formed between the respective data areas. The servo pits 8a and 8b are arranged on both the sides of the center line C of the track alternately in a zigzag form and formed at positions a quarter of the track width apart from the center line C so as to have protruding or recessed shapes. The intensities of signals read from the two types of the servo pits 8a and 8b arranged in a wobbling state on the optical disc are compared with each other to perform the tracking servo of a laser spot. The pit lengths of the servo pits 8a and 8b are so selected as to have the space frequency sensitivity in a reproducing optical system not less than 0.4.

公开(公告)号：JPH07272320A

公开(公告)日：1995-10-20

申请号：JP5745994

申请日：1994-03-28

Applicant: SONY CORP

Inventor： AKIMOTO YOSHIHIRO ,  TOMITA TAKASHI

IPC: G11B7/24 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To obtain an information recording medium capable of inhibiting warpage while maintaining its laminated structure even if the substrate is thinned to increase density by regulating the thickness of a required protective layer to a prescribed value or above when the thickness of a substrate is a prescribed value or below. CONSTITUTION:A recording film 2 and a protective film 1 are laminated on the principal face of a substrate 3 to obtain an optical disk. When the thickness of the substrate 3 is reduced to =20mum thickness. The objective optical disk capable of inhibiting warpage while maintaining its laminated structure is obtd. even if the substrate is thinned to increase density.

公开(公告)号：JPH0240602A

公开(公告)日：1990-02-09

申请号：JP19154888

申请日：1988-07-29

Applicant: SONY CORP

Inventor： USUI SETSUO ,  SAMEJIMA TOSHIYUKI ,  TOMITA TAKASHI

IPC: G02B5/00

Abstract: PURPOSE:To convert light having nonuniform intensity to exit collimated beams of light having a uniform intensity distribution by dividing the incident collimated beams of light which enter the incident surface of a transparent plate on an incident side at an incident angle to plural collimated beams of light by a partial transmission mirror and total reflecting mirrors. CONSTITUTION:The transmittance of the partial transmission mirror M2 and the relative positions of the total reflecting mirrors M1, M3 and the partial transmission mirror M2 are so determined that the respective elements of the conversion matrix from the incident collimated beams of light to the exit collimated beams of light attains 1/N (where N is the number of division of the incident collimated beams of light by the mirrors M2 and M1, M3) with the transmittance as variable; in addition, equation I and equation II are satisfied. The incident collimated beams of light of the nonuniform intensity incident at an angle alpha on the incident surface of the transparent plate P1 on the incident side is divided to the plural collimated beams of light by the mirrors M2 and M1, M3 and these collimated beams of light are superposed on each other, by which the exit collimated beams of light having the uniform intensity distribution are obtd. from the exit surface of the transparent plate P3 on the exit side.

公开(公告)号：JPH0224601A

公开(公告)日：1990-01-26

申请号：JP17416288

申请日：1988-07-13

Applicant: SONY CORP

Inventor： USUI SETSUO ,  SAMEJIMA TOSHIYUKI ,  TOMITA TAKASHI

IPC: G02B5/04

Abstract: PURPOSE:To convert incident parallel light which has an irregular intensity distribution into output projection parallel light which has a uniform intensity distribution by superposing plural parallel light beams mutually and obtaining the projection parallel light which has the uniform intensity distribution. CONSTITUTION:This element is equipped with a trimetric body prism P which has a 45 deg. vertical angle and a partial transmissive mirror M which is provided in the prism in parallel to its slanting surface. Then the number of prisms P, the transmissivity and the number of mirrors M, and the position in the prisms are so determined that respective elements of a conversion matrix from the incident parallel light A to the projection parallel light B which include the transmissivity as a variable are 1/N. Then, the incident parallel light A which is incident on the incidence surface of a prism P at 45 deg. to a mirror M and has the irregular intensity distribution is split by the mirror M into plural parallel light beams, which are superposed mutually to obtain the projection parallel light B which has the uniform intensity distribution.

公开(公告)号：JPH01244415A

公开(公告)日：1989-09-28

申请号：JP28507587

申请日：1987-11-11

Applicant: SONY CORP

Inventor： USUI SETSUO ,  SAMEJIMA TOSHIYUKI ,  TOMITA TAKASHI

IPC: G02B19/00 ,  G02B27/00

Abstract: PURPOSE:To obtain an optical device which can make irradiation of uniform intensity by using a tapered rod having an emitting end face which is smaller than its incident end face and total reflection mirror and superposing plural parallel rays emitted from the emitting end face upon each other. CONSTITUTION:A tapered rod R made of a transparent material, such as glass, is provided with an incident end face Ra and emitting end face Rb which is smaller than the incident end face Ra. When parallel beams B are made incident on the incident end face Ra of the tapered rod R perpendiculary to the end face Ra, plural parallel beams are emitted from the emitting end face Rb. At the position in the middle of the emitting end face Rb and irradiated surface SIGMAa superposing optical system I composed of total reflection mirrors M1, M2, M1', and M2', etc., is provided and the parallel beams emitted from the emitting end face Rb of the tapered rod R are superposed upon each other after they are totally reflected by the mirrors. Thus irradiation of a uniform intensity distribution can be performed on the irradiated surface SIGMA.

公开(公告)号：JPS6144785A

公开(公告)日：1986-03-04

申请号：JP16619184

申请日：1984-08-08

Applicant: Sony Corp

Inventor： TOMITA TAKASHI

IPC: C30B13/06 ,  C30B1/08 ,  C30B13/00 ,  H01L21/20 ,  H01L21/208 ,  H01L21/368

Abstract: PURPOSE: To obtain a thin film of a semiconductor single crystal having high quality and resistant to the formation of crystal boundary, by applying a heat-dissipation controlling layer to form a double-humped temperature distribution selectively to a semiconductor layer interposing a reaction-prevention layer therebetween.
CONSTITUTION: A polycrystalline semiconductor layer 2 is formed in stripe form on the insulating substrate 1 made of e.g. quartz. A reaction-prevention layer 8 made of SiO
2 , etc. and having a thickness of about ≤5,000Å is applied to the substrate 1 and the polycrystalline semiconductor layer 2. A highly heat-conductive layer 9A is applied to the center of the polycrystalline semiconductor layer 2 along its longitudinal direction. A linear heating means is placed nearly perpendicularly to the longitudinal direction of the polycrystalline semiconductor layer 2, and transferred along the longitudinal direction. The polycrystalline semiconductor layer 2 just below the heater is melted and then cooled, solidified and recrystallized spontaneously. The temperature distribution along the width of the semiconductor layer 2 becomes a double-humped distribution by this process. Accordingly, the conversion to single crystal takes place from the center of the semiconductor layer 2, and proceeds gradually toward both ends. Consequently, the formation of crystal grain boundary at the center part of the semiconductor layer 2 can be prevented.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了获得具有高质量并且耐晶界的形成的半导体单晶的薄膜，通过施加散热控制层以选择性地形成双峰温度分布到插入反应预防的半导体层 层之间。 构成：多晶半导体层2以带状形式形成在由例如玻璃制成的绝缘基板1上。 石英。 将由SiO 2等制成并具有约<= 5,000Ang厚度的反应防止层8施加到基板1和多晶半导体层2上。将高导热层9A施加到多晶 半导体层2沿着其纵向方向。 线性加热装置几乎垂直于多晶半导体层2的纵向放置，并沿纵向方向转移。 将加热器正下方的多晶半导体层2熔化，然后冷却，固化并自发重结晶。 沿半导体层2的宽度的温度分布通过该处理成为双峰分布。 因此，从半导体层2的中心发生向单晶的转变，并且朝向两端逐渐进行。 因此，可以防止半导体层2的中心部分的晶界的形成。

公开(公告)号：JPS60260492A

公开(公告)日：1985-12-23

申请号：JP11479084

申请日：1984-06-05

Applicant: SONY CORP

Inventor： TOMITA TAKASHI

IPC: C30B13/34 ,  C30B1/08 ,  C30B13/00 ,  H01L21/02

Abstract: PURPOSE:To prepare recrystallized thin film having aligned crystal orientation without using a seed crystal in the titled process wherein a heat melting means is scanned on a semiconductor thin film formed on a substrate by providing a pseudo seed crystal for aligning the crystal orientation on the semiconductor thin film. CONSTITUTION:A pseudo seed crystal for aligning crystal orientation is formed, for example, by providing a hole part 3 having no deposited polycrystalline Si to an appropriate position of a polycrystalline Si thin film 2 formed on a quartz substrate 1. The shape of the hole 3 is a square having a pair of side arrnaged in parallel to the direction of the scanning L of laser beam, or a triangle, etc. Although the shape, size, and distribution, etc. of these sides may be selected optionally, square shape is most preferred, and suitable length of one side is several-10mum. The distance between holes 3 is regulated to