Die and glass material for forming glass substrate, method for manufacturing glass substrate, and magnetic disk glass substrate
A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the upper and the lower die, and then heated, softened, and molded by pressure into a glass substrate in the shape of a parallel plate. The amoun...
Saved in:
Main Authors | , , , , |
---|---|
Format | Patent |
Language | English |
Published |
13.04.2004
|
Edition | 7 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Abstract | A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the upper and the lower die, and then heated, softened, and molded by pressure into a glass substrate in the shape of a parallel plate. The amount of thermal contraction of the control member is smaller than that of the glass material. Therefore, the glass substrate is released from the die when cooled after molding. The present invention can provide a glass substrate that is excellent in smoothness and form accuracy of the surface, and that is suitable for recording media such as magnetic disks that are inexpensive and suitable for mass production. |
---|---|
AbstractList | A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the upper and the lower die, and then heated, softened, and molded by pressure into a glass substrate in the shape of a parallel plate. The amount of thermal contraction of the control member is smaller than that of the glass material. Therefore, the glass substrate is released from the die when cooled after molding. The present invention can provide a glass substrate that is excellent in smoothness and form accuracy of the surface, and that is suitable for recording media such as magnetic disks that are inexpensive and suitable for mass production. |
Author | TOKUNAGA TOMOKAZU OKUYAMA FUJIO ONODA MINORU TAKAGI KAZUAKI HIBINO KUNIO |
Author_xml | – fullname: TAKAGI KAZUAKI – fullname: ONODA MINORU – fullname: OKUYAMA FUJIO – fullname: TOKUNAGA TOMOKAZU – fullname: HIBINO KUNIO |
BookMark | eNrjYmDJy89L5WSod8lMVUjMS1FIz0ksLlbITSxJLcpMzFFIyy8C4dzMvHSoVHFpUnFJEVBeRyE3tSQjPwWsJjcxrzQtMbmktAirSpDJuYnpeaklmckKKZnF2ehKeBhY0xJzilN5oTQ3g4Kba4izh25qQX58anFBYnIqUHN8aLCZuaGFuaWlk5ExEUoA1_tKug |
ContentType | Patent |
DBID | EVB |
DatabaseName | esp@cenet |
DatabaseTitleList | |
Database_xml | – sequence: 1 dbid: EVB name: esp@cenet url: http://worldwide.espacenet.com/singleLineSearch?locale=en_EP sourceTypes: Open Access Repository |
DeliveryMethod | fulltext_linktorsrc |
Discipline | Medicine Chemistry Sciences |
Edition | 7 |
ExternalDocumentID | US6718799B2 |
GroupedDBID | EVB |
ID | FETCH-epo_espacenet_US6718799B23 |
IEDL.DBID | EVB |
IngestDate | Fri Jul 19 11:47:09 EDT 2024 |
IsOpenAccess | true |
IsPeerReviewed | false |
IsScholarly | false |
Language | English |
LinkModel | DirectLink |
MergedId | FETCHMERGED-epo_espacenet_US6718799B23 |
Notes | Application Number: US20030358468 |
OpenAccessLink | https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20040413&DB=EPODOC&CC=US&NR=6718799B2 |
ParticipantIDs | epo_espacenet_US6718799B2 |
PublicationCentury | 2000 |
PublicationDate | 20040413 |
PublicationDateYYYYMMDD | 2004-04-13 |
PublicationDate_xml | – month: 04 year: 2004 text: 20040413 day: 13 |
PublicationDecade | 2000 |
PublicationYear | 2004 |
RelatedCompanies | MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
RelatedCompanies_xml | – name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
Score | 2.597692 |
Snippet | A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the... |
SourceID | epo |
SourceType | Open Access Repository |
SubjectTerms | CHEMISTRY GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL |
Title | Die and glass material for forming glass substrate, method for manufacturing glass substrate, and magnetic disk glass substrate |
URI | https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20040413&DB=EPODOC&locale=&CC=US&NR=6718799B2 |
hasFullText | 1 |
inHoldings | 1 |
isFullTextHit | |
isPrint | |
link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV3dS8MwED_GFPVNp-L8Ig_SJ4uuTbv2oQhrN4awD9wmextJm40izYbt8NF_3Utcpyj6UAjNcZCQ390vH3cHcMN4I1bVA8x503JM2kh8k3HPNYXHYm5bTUb10UWv73Yn9HHqTCuQlrEwOk_om06OiIiKEe-Ftterr0OsSL-tzO94ir-WD51xEBnl7pjeo1E2olbQHg6iQWiEYTAZGf2nwG2qstp-C631jmLRKs1--7mlglJW3z1K5xB2h6hMFkdQEbIG-2FZeK0Ge73NfTc2N9DLj-E9SgXBbT_RfJcg0dRrhyDpVF-GLmjTlaMt0Dlnb8lnfWgtkzG5VlEMOizxt6TSnLGFVDGNJEnzl58iJ0A67XHYNXEks-2szSaj7ZjtU6jKpRRnQPy5LRB0rsOdhCLa_XlsxRajIkGu4LmsDvU_1Zz_03cBB-WbloZ9CdXidS2u0F0X_FpP9AdDQJ10 |
link.rule.ids | 230,309,786,891,25594,76903 |
linkProvider | European Patent Office |
linkToHtml | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LS8NAEB5KFetNq2J97kFyMmjzbA5BaNJQtUmLTaW3skm2JUjTYlI8-tedXZsqih4CITsM7JJvHrv7zQBc0agZ8-4B8tRUdFlrJpZMo5YhsxaNI1UxqSa2LvzA6I60h7E-rkBacmFEndA3URwRERUj3gthr5dfm1iuuFuZ30QpflrceaHtSmV2rN2iUZbctt0Z9N2-IzmOPRpKwZNtmLytttVGa71lYkYoMqXnNielLL97FG8PtgeoLCv2ocKyOtScsvFaHXb89Xk3vq6hlx_Au5sygmk_EfEuwUBT_DsEg07-zNEFrYdytAWi5uw1-ewPLWTmNFtxFoOgJf6W5JrndJZxTiNJ0vzlp8ghEK8TOl0ZZzLZrNpkNNzMWT2CarbI2DEQa6oyBJ2hR3qiIdqtaazECtVYgrFCy6ANaPyp5uSfsUuodUO_N-ndB4-nsFveb2mqZ1AtXlfsHF13EV2IRf8Axg2gXg |
openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.title=Die+and+glass+material+for+forming+glass+substrate%2C+method+for+manufacturing+glass+substrate%2C+and+magnetic+disk+glass+substrate&rft.inventor=TAKAGI+KAZUAKI&rft.inventor=ONODA+MINORU&rft.inventor=OKUYAMA+FUJIO&rft.inventor=TOKUNAGA+TOMOKAZU&rft.inventor=HIBINO+KUNIO&rft.date=2004-04-13&rft.externalDBID=B2&rft.externalDocID=US6718799B2 |