WO1998044507A1 - Systeme de memoire a disques et procede permettant de produire un tel systeme - Google Patents

Systeme de memoire a disques et procede permettant de produire un tel systeme Download PDF

Info

Publication number
WO1998044507A1
WO1998044507A1 PCT/EP1997/001631 EP9701631W WO9844507A1 WO 1998044507 A1 WO1998044507 A1 WO 1998044507A1 EP 9701631 W EP9701631 W EP 9701631W WO 9844507 A1 WO9844507 A1 WO 9844507A1
Authority
WO
WIPO (PCT)
Prior art keywords
disk
device chassis
chassis
hub
disk storage
Prior art date
Application number
PCT/EP1997/001631
Other languages
German (de)
English (en)
Inventor
Georg F. Papst
Original Assignee
Papst Licensing Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Papst Licensing Gmbh filed Critical Papst Licensing Gmbh
Priority to PCT/EP1997/001631 priority Critical patent/WO1998044507A1/fr
Publication of WO1998044507A1 publication Critical patent/WO1998044507A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs

Definitions

  • the present invention relates to a disk storage device according to the preamble of claim 1 and a method for producing such a disk storage device.
  • the invention relates to disk storage devices with one or more disk-like information carriers which are fastened or can be fastened to a rotatable disk carrier hub and are accommodated in an operating space of a device housing which is closed off from the environment and from which or onto which optical or magnetic writing devices can be moved by means of the information carriers. / Read heads data can be recorded or read.
  • a one-piece device chassis or a base plate made of cast metal or aluminum or die-casting is provided, in or in which the bores or functional surfaces or bearing seats for the bearings and drives of the information carriers and the writing / Read heads are machined.
  • Cast components offer the advantage that the formation of projections, flanges and hubs is relatively simple by appropriate shaping and casting-appropriate design of the molds and tools.
  • both the information carriers and read / write heads with drive devices as well as a flat or bowl-shaped device housing cover made of formed sheet metal are mounted on the device chassis, which the individual components for forming the operating room with reduced contamination, especially with hard disks (HDD) with as possible of great purity.
  • HDD hard disks
  • EP-0 184 159 Another generic disk storage device, as based on the present invention, is described in EP-0 184 159.
  • This device is initially shown schematically and in an embodiment in Figures 1 and 2 each in section. The following description explains, by way of example, the technical components and features of this device which may also be present in exemplary embodiments of the device according to the invention and therefore are not explained again in detail within the scope of the detailed description of the invention.
  • HDD hard disk storage device
  • Cast metal device chassis 1 has a vertically cast bearing journal 2 from this outstanding with a bearing bore 3. With dash-dotted lines are the outer contour of a device cover 4, a rotatable hub 5, which is one or more concentric
  • Guide slots 8 are machined together with the bearing bore 3 for the axis of rotation of the disk hub in a clamping of the device chassis 1, in order thereby to achieve the required accuracy with regard to the positional relationship and dimensional accuracy.
  • the storage disks and the read / write heads are accommodated in an operating room which serves as a so-called clean room 19 and which is formed during the manufacture of the device with great cleanliness by finally sealing the device chassis 1 and device cover 4 from the environment.
  • the scanning heads and their drive can also be mounted on a fixed journal of the device chassis or in a bearing bore in the device chassis for their movement relative to the surface of the storage disks.
  • the one-piece device chassis 1 which is designed as a cast part, is at least a carrier for all drive devices and bearings, the mutual arrangement, alignment and movement of which are essential for the function of the most exacting operations during the operation of the disk storage device, and that all are related with the storage and the drive of the disk storage and the scanning heads, standing storage and functional surfaces can be processed in a common clamping of the device chassis.
  • Fig. 2 shows another, more detailed embodiment of a disk storage device, the storage disks, scanning heads and associated drive and device cover and other details are omitted for simplicity in the illustration, because their
  • FIG. 1 Design is known per se and can be chosen arbitrarily within the scope of the invention, for example as in FIG. 1.
  • This example also shows a spindle motor arranged in the hub, in which the shaft rotates together with the hub and is mounted in the device chassis.
  • the shaft can also be fixed in a bore in the device chassis as a fixed axle journal and the bearing can be provided in the hub.
  • Bearing guide pin 2 for the storage plates in the device chassis 1 made of cast aluminum deepened like a tub. This recess both increases the rigidity of the device chassis and reduces the overall height of the device.
  • a steel sleeve 10 is pressed or glued into the bearing bore 3 of the bearing guide pin, in which the roller bearings 11 are used for mounting the shaft 12 for the bell-shaped hub 5 for holding the storage disks and are clamped, for example, with a spring 13.
  • the shaft 12 is fitted into the hub 5 with high precision, the cylindrical outer surface of the hub also being highly precise coaxial with the axis of rotation 14.
  • grooves in the shaft act as inner races for the roller bearings 11.
  • Other bearings are of course also possible.
  • a rounding 15 is provided which is able to discharge electrostatic charge via a point bearing surface of a plastic block 16 via a resilient metal cap 17 inserted into the steel sleeve.
  • the motor is supplied with the necessary control signals via flat cables 18. Due to the demands in this technical area for further miniaturization of the disk storage devices while reducing the material and manufacturing costs and increasing the performance (storage capacity, access time, data transfer rate, etc.), the object of the present invention is to specify a disk storage device and a method for its production, which enables further cost reductions and miniaturization.
  • this object is achieved by creating a disk storage device with one or more information carrier disks fastened or fastened to a rotatable disk carrier hub and rotatable in an operating space by means of the disk carrier hub for storing data and one or more optical or magnetic read / write heads that can be moved relative to surfaces of the information carrier disks for recording and / or reading out the data on or from the surfaces of the information carrier disks, wherein the disk carrier hub and the read / write heads are mounted with their drive units on an integral device chassis and a device cover is provided which is fastened to the device chassis and wherein Storage and mounting surfaces for the disk carrier hub and for the read / write heads as well as for their drive units on the device chassis in one
  • the device chassis being formed by a sheet metal part produced by means of stamping and forming or embossing.
  • the device chassis As a punching and forming
  • Sheet metal part the production of this important part of the device and thus the entire device can be carried out in fewer sub-steps and overall less expensively and, for example, automation can be carried out much more easily than with the castings previously used. This is all the more important since the bearing and functional surfaces of the device chassis have to be machined in one setup.
  • By choosing one suitably alloyed starting sheets can also be easily adjusted long-term and strength properties of the device chassis.
  • the strength or rigidity of the device chassis can be increased in a manner known per se by simple bead-shaped configurations without having to increase the material thickness of the sheet or the weight.
  • the long-term accuracy or dimensional accuracy of the device chassis and thus the functional and storage areas provided can be easily improved by suitable thermal treatment.
  • the manufacturing and processing costs for sheet metal parts are lower than for cast parts.
  • pipe sections or bearing journals are used to form bearing sections for the
  • Information carrier plate hub and / or the read / write heads are welded to the device chassis, preferably by means of the capacitor pulse welding or electron beam welding known per se.
  • This configuration makes it possible to provide storage positions for a wide variety of functional elements in a cost-effective manner, which are then processed in a common setting.
  • the choice of capacitor pulse welding or electron beam welding as connection types without significant temperature development and heating of the device chassis outside the welding points allows the generation of stresses and thus also long-term deformations of the sheet metal part to be largely restricted.
  • internal stresses that are still present can be eliminated in a manner known per se by suitable thermal aftertreatment prior to machining, for example by heating.
  • the pipe section on the end face, with which it is placed on the device chassis is chamfered towards the outer circumference to reduce the contact area.
  • the pipe sections or bearing journals for forming the bearing sections can also be riveted to the base plate forming the device chassis in a manner known per se.
  • an attachment is provided on the underside of the pipe sections or bearing journals, which extends through a hole or recess in the base plate and is riveted on the opposite side. After riveting the pipe sections or bearing journals, they are machined as part of the finishing process on the inner and / or outer circumferential surfaces in order to ensure the accuracy of the functional surfaces.
  • bead-like formations for increasing the rigidity of the device chassis and / or for forming a gap seal can be formed with the drive unit of the information carrier plates, in particular the plate carrier hub, in the sheet metal molded part forming the device chassis, the bead-like formations forming a gap seal for the shaft of the Disc carrier hub concentric circumferential
  • the configuration according to the invention as a molded sheet metal part enables the use of steel sheet or an aluminum sheet, pipe sections and axle journals to be welded being made of a material which can be welded to it.
  • the treatment methods suitable for this material are also to be used to avoid or eliminate stresses that arise during forming and welding - for example, by warming up as a so-called intermediate annealing before forming.
  • Information carrier plates rigid plates attached to the hub and the operating room in which the
  • Rotating information carrier plates is a room of the highest purity, which is formed by the device chassis and the device cover attached to it.
  • Such a device is thus a hard disk storage device or so-called hard disk drive.
  • the information carrier disks are rigid or flexible storage disks which are arranged in an exchangeable cassette which forms the operating area of increased purity, the storage disks with the exchangeable cassette being insertable into the device and after being inserted by means of a device the disk carrier hub are attachable.
  • a method for producing a disk storage device with one or more information carrier disks fastened or fastened to a rotatable disk carrier hub and rotatable in an operating space by means of the disk carrier hub for storing data and one or more optical disks movable relative to surfaces of the information carrier disks or magnetic read / write heads for recording and / or reading out the data on or from the surfaces of the information carrier disks, the disk carrier hub and the read / write heads with their drive units being mounted on a one-piece device chassis and one
  • Device cover is provided, which is attached to the device chassis and the bearing and mounting surfaces for the disk carrier hub and for the read / write heads and for their drive units are machined on the device chassis in one setting, the device chassis being formed by stamping and shaping or embossing a sheet metal part.
  • FIGS. 3A to 3D some exemplary embodiments of the device chassis made of a sheet metal stamping-shaped part used in a disk storage device according to the invention are explained with reference to FIGS. 3A to 3D, the further functional elements being no longer described, since they are known per se and in any way as in the prior art (For example, as shown in Figures 1 and 2 and explained in this context) can be formed.
  • FIGS. 3A to 3D each show a sheet metal part serving as a device chassis, in which the formations or depressions 27 and edge sections for attaching other housing parts by embossing, which are required for accommodating the functional units such as storage disks and read / write heads, as well as their drives and bearings or hub or forming are formed.
  • Bearing support tubes 21 can either be pressed into the cutouts of the sheet metal part 1 produced by drilling or punching, glued or welded by means of condenser pulse welding or can be fastened directly to a surface in the same way.
  • Figures 3A to 3D show different combinations of journals 20 and Bearing support tubes 21 and different variants of the mounting of the bearing pins on the sheet metal part.
  • the tube sections 21 serving as bearing support tubes have a phase or bevel 22 on the front side, with which they are placed on the sheet metal part 1 serving as the device chassis.
  • This bevel reduces the contact area between the pipe section and the contact area. This results in a more precisely defined welding and a higher energy density at the welding point in the case of capacitor pulse welding due to the smaller contact area and a smaller heating zone around the actual welding point.
  • the fusion or welding takes place at the area of the tip of the
  • a smaller contact surface also ensures that contact is ensured over the entire circumference if possible.
  • the bevel ensures that the welding zone is not in the area of the final diameter of the bearing bore.
  • the pipe sections are each arranged concentrically with a recess 23 in the sheet metal part.
  • the inner diameter of the pipe sections 21 and the concentric recess 23 in the sheet metal part is somewhat smaller than the final diameter 2 required for receiving the shaft or bearing.
  • the inner diameter of the pipe section is machined together with the inner diameter of the recess, so that the highest possible accuracy is achieved.
  • the material removal on the pipe section and on the inner circumference of the recess should be chosen to be as small as possible to avoid excessive heating and tension.
  • the axle journals or tubular sections are machined with respect to their functional surfaces in a clamping of the device chassis in order to achieve the required ' accuracy achieve.
  • the tubular sections can either be prepared on the inner circumference if the bearing is to be inserted into the tubular section or on the outer circumference if the bearing is to be mounted on the outside.
  • the upper end faces of the tubular sections and journals as well as functional surfaces and mounting holes on the base plate forming the device chassis can be machined in a simple manner.
  • Formations 25, 26 serve, among other things, to increase the rigidity of the device chassis, whereby the long-term accuracy of the device chassis can also be increased in a targeted manner by reducing or absorbing or compensating for stresses caused by mechanical or thermal influences without permanent deformations and thus changes the positional relationship of the functional and storage areas. If, for example, there are rolling defects in the base material of the device chassis in the area of the bearing support surfaces, this could have a very disadvantageous effect on the long-term accuracy or dimensional accuracy of the device chassis. For steel, therefore, stress relief annealing should be carried out before the first deformation.
  • the bead-like formations 25 have an annular groove which extends concentrically around the bearing axis of the storage disk hub 5 and a bump ring which, in cooperation with a correspondingly shaped projection (schematically shown) of the disk carrier hub 5 or of the motor 28, which in the Ring groove engages, form a so-called gap seal.
  • the arrangement of the known motor 28 within the hub and the storage disks 6 on correspondingly designed receiving areas of the disk carrier hub 5, which can be driven by the motor 28 and is mounted on the bearing journal by means of the bearing 29, is shown schematically.
  • 3D serve, for example, for fastening the (only schematically and partially indicated) trough-like or shell-like device cover 4, which is inserted into the peripheral bead and welded to the base plate in this area, screwed together or is glued or sealed. If necessary, an additional seal can be provided at this connection point.
  • the clean room or high-purity operating room 19 is formed by the base plate or the device chassis 1 and the device cover 4.
  • the sheet metal part is tub-like, for example by deep-drawing the
  • the device cover 4 (also shown only schematically and partially) can be designed as a relatively flat cover.
  • the device chassis is manufactured from the starting material by the following steps: punching, if necessary thermal pretreatment (stress relieving), embossing (sheet metal forming), if necessary temperature treatment (depending on the modulus of elasticity and time / temperature behavior of the material), welding of bearing bolts and / or bearing support tubes, thermal post-treatment (tempering) and / or post-embossing, fine finishing of the bearing and reference surfaces in one clamping if possible.
  • the processing of the sheet metal part by stamping is preferred.
  • other methods can also be used that cause little or no internal stress in the components, such as ablation methods in a non-mechanical way (chemical Ablation, electron or laser beam machining, plasma beam machining, electroerosive ablation, etc.).
  • the thermal treatment for relieving the internal stresses is carried out before the first embossing or forming and before, but possibly also after
  • Capacitor pulse welding is a suitable welding method because it only exerts very little thermal influence on the areas outside the welding zone and therefore minimizes the risk or the extent of deformation.
  • Other welding or joining processes that meet these requirements can also be used.
  • adhesive or soldering processes can also be used.
  • the disk storage device has been described with reference to a hard disk storage device or HDD, in which the storage disks are rigidly attached to the rotatable hub as rigid magnetic disks and constantly together with the magnetic read / write heads in the through tightly connected device chassis and device cover formed operating room are as high as possible cleanliness (clean room).
  • HDD hard disk storage device
  • the disk storage device according to the invention and the method can also be a so-called
  • Storage device a floppy storage device, a CD-ROM device or a DVD device, in which the storage disks are flexible or rigid magnetic or optical disks, which are either arranged in a removable cassette and are inserted with this or directly into the device and can only be fixed on the rotatable disc carrier hub after insertion into the device or clamped onto the disc carrier hub by means of a suitable device (mechanical or magnetic clamping device).
  • a suitable device mechanical or magnetic clamping device

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

L'invention concerne un système de mémoire à disques comportant au moins un support de données sous forme de disques, fixés ou pouvant être fixés sur le moyeu d'un support de disques et montés dans l'espace de fonctionnement délimité par l'environnement, du boîtier d'un système, et grâce auxquels ou sur lesquels peuvent être enregistrées ou lues des données à l'aide de têtes d'écriture/lecture optiques ou magnétiques, déplaçables par l'intermédiaire des supports de données. Le moyeu de support de disques et les têtes d'écriture/lecture conjointement avec leurs unités d'entraînement sont montés sur un châssis de système monobloc. Les surfaces d'appui et de montage prévues pour le moyeu des disques supports de données et pour les têtes d'écriture/lecture, ainsi que pour leurs unités d'entraînement sont travaillées sur le châssis du système en vue d'un serrage. Le châssis du système est formé par une pièce de tôle obtenue par poinçonnage et déformation ou estampage. Le fait que le châssis du système se présente sous forme de pièce de tôle poinçonnée et déformée permet de réaliser le système en moins d'étapes intermédiaires, de manière globalement plus économique et de façon automatisée sensiblement plus simple qu'avec les pièces en fonte utilisées jusqu'à présent pour réaliser des châssis de ce type. L'invention concerne en outre un procédé permettant de produire un système de mémoire à disques de ce type.
PCT/EP1997/001631 1997-04-01 1997-04-01 Systeme de memoire a disques et procede permettant de produire un tel systeme WO1998044507A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP1997/001631 WO1998044507A1 (fr) 1997-04-01 1997-04-01 Systeme de memoire a disques et procede permettant de produire un tel systeme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1997/001631 WO1998044507A1 (fr) 1997-04-01 1997-04-01 Systeme de memoire a disques et procede permettant de produire un tel systeme

Publications (1)

Publication Number Publication Date
WO1998044507A1 true WO1998044507A1 (fr) 1998-10-08

Family

ID=8166568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/001631 WO1998044507A1 (fr) 1997-04-01 1997-04-01 Systeme de memoire a disques et procede permettant de produire un tel systeme

Country Status (1)

Country Link
WO (1) WO1998044507A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004068479A1 (fr) * 2003-01-09 2004-08-12 Infinite Data Storage Limited Ensemble mecanique optique monobloc pour moteurs de stockage de donnees optiques
CN107060097A (zh) * 2017-06-28 2017-08-18 五冶集团上海有限公司 一种“y”型钢结构底座

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184159A2 (fr) * 1984-11-29 1986-06-11 PAPST-MOTOREN GmbH & Co. KG Système d'entraînement intégré pour mémoire à disque dur
EP0569593A1 (fr) * 1991-11-22 1993-11-18 Fujitsu Limited Dispositif a disque
WO1994009487A1 (fr) * 1992-10-14 1994-04-28 Maxtor Corporation Facteur de forme de 10 millimetres pour une unite d'entrainement de disquettes de 2,5 pouces
US5414574A (en) * 1993-07-29 1995-05-09 International Business Machines Corporation Hybrid base for ultrathin disk drives
US5473507A (en) * 1991-12-11 1995-12-05 Hewlett-Packard Company Chassis of a device
EP0715309A2 (fr) * 1994-11-28 1996-06-05 Minebea Kabushiki-Kaisha Bas de boîtier pour dispositif d'entraînement de disque dur et sa méthode de fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184159A2 (fr) * 1984-11-29 1986-06-11 PAPST-MOTOREN GmbH & Co. KG Système d'entraînement intégré pour mémoire à disque dur
EP0569593A1 (fr) * 1991-11-22 1993-11-18 Fujitsu Limited Dispositif a disque
US5473507A (en) * 1991-12-11 1995-12-05 Hewlett-Packard Company Chassis of a device
WO1994009487A1 (fr) * 1992-10-14 1994-04-28 Maxtor Corporation Facteur de forme de 10 millimetres pour une unite d'entrainement de disquettes de 2,5 pouces
US5414574A (en) * 1993-07-29 1995-05-09 International Business Machines Corporation Hybrid base for ultrathin disk drives
EP0715309A2 (fr) * 1994-11-28 1996-06-05 Minebea Kabushiki-Kaisha Bas de boîtier pour dispositif d'entraînement de disque dur et sa méthode de fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004068479A1 (fr) * 2003-01-09 2004-08-12 Infinite Data Storage Limited Ensemble mecanique optique monobloc pour moteurs de stockage de donnees optiques
CN107060097A (zh) * 2017-06-28 2017-08-18 五冶集团上海有限公司 一种“y”型钢结构底座
CN107060097B (zh) * 2017-06-28 2024-03-15 五冶集团上海有限公司 一种“y”型钢结构底座

Similar Documents

Publication Publication Date Title
EP0153461B1 (fr) Mémoire magnétique à disques avec dispositif d'empilement des disques placé de part et d'autre
DE69625569T2 (de) Hydrodynamisches Lager mit einer Gegenscheibe die auf einer Seite mit Rillen versehen ist
EP0830228B1 (fr) Procede d'usinage par enlevement de copeaux de contours cylindriques, dispositif de mise en uvre du procede et plaquette de coupe associee
DE3780973T2 (de) Informationsverarbeitungsgeraet.
DE68923372T2 (de) Verfahren zum zusammensetzen eines festen magnetplattengerätes.
EP0291053A1 (fr) Pile de disques avec compensation de la dilatation due aux variations de température
DE69108950T2 (de) Drehendes Lagegerät in Plattenspeicheranordnung.
CH628474A5 (de) Rotoranordnung fuer schrittschaltmotoren.
WO1998044507A1 (fr) Systeme de memoire a disques et procede permettant de produire un tel systeme
DE69318916T2 (de) Verfahren zur Herstellung eines dynamischen Rillenlagers; Verfahren zur Herstellung einer Datenspeichereinheit versehen mit einem derartigen Rillenlager; Verfahren zur Herstellung einer drehbaren Abtasteinheit versehen mit einem derartigen Rillenlager ; und Verfahren zur Herstellung eines Magnetbandgerätes versehen mit einer derartigen Abtasteinheit
EP0869503B1 (fr) Appareil à mémoire à disques et procédé de fabrication d'un appareil à mémoire à disques
DE1909485C3 (fr)
DE3734685C2 (fr)
DE69132858T2 (de) Positionierungsvorrichtung mit statischen Flüssigkeitslagern
DE2924858A1 (de) Magnetischer wandlerkern und verfahren zu seiner herstellung
DE2440123C2 (de) Maschine zum Fertigschleifen der Kolbengehäuse von Drehkolbenmotoren oder dergleichen
DE29705739U1 (de) Plattenspeichergerät
DE1909485B2 (de) Nabenanordnung zur halterung einer magnetplatte eines plattenspeichers
DE4216489C2 (de) Plattenantriebsmotor
DE3003972A1 (de) Drehbares traegerteil zur halterung von magnetkoepfen
DE60026630T2 (de) Spindelmotor
DE2017339C3 (fr)
DE60131035T2 (de) Datenspeicherplattenträger
EP0184159B1 (fr) Système d'entraînement intégré pour mémoire à disque dur
DE69126216T2 (de) Rotierendes ringförminges Schneidewerkzeug

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CN HU JP KR RU SG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: CA

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998541079

Format of ref document f/p: F