Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Adhesives and Rubbers

Edge-strengthened-substrate-of-a-data-storage-disk-and-method-for-fabricating-same

Thermoplastic polymer blends comprising EPDM and EP

The thermoplastic polymer blends of this invention comprise a physical mixture of two polymer ...

Viscosity index improver and method for producing the same

OF THE INVENTION The olefinic polymers to be used in this invention as component (1) are generally ...

Alkyd resins and coating compositions therefrom based on copolymers of allyl alcohol propoxylates and vinyl aromatic monomers

OF THE INVENTION The copolymers of the invention have recurring units of a vinyl aromatic monomer ...

Method for making free flowing coated rubber pellets

It has surprisingly been found that a rubber pellet composition comprising an elastomer and plastic ...

Films of LLDPE, PP and EPR having improved stiffness, tear and impact strength

OF THE INVENTION The thermoplastic blends of this invention generally comprise 60 to 95 weight ...

Process for making polyvinyl chloride compositions having high heat distortion temperatures

According to the present invention, there is now provided a process for the manufacture of a ...

Coating composition for steel containing zinc metal, zinc oxide, molybdenum sulfide, a resin and a solvent

I claim: 1. A solid lubricant and corrosion inhibiting composition comprising 5 to 20 parts by ...

Sulfonated asphalt

What is claimed is: 1. A well working fluid comprising a fluid medium and a sulfonated blend of ...

Asphalt containing gilsonite, reactive oil and elastomer

OF THE INVENTION It has been discovered that an asphalt cement can be toughened with gilsonite and ...

Liquid coating composition for use in forming photoresist coating films and photoresist material using said composition

An object of the invention is to provide a liquid coating composition suitable for use in forming a ...

Edge strengthened substrate of a data storage disk and method for fabricating same

Details

Inventors: Starcke, Steven Francis; Amundson, John David; Piltingsrud, Douglas Howard;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Evans; Elizabeth
Assistant Examiner:
Attorney, Agent or Firm: Hollingsowrth; Mark A., Bussan; Matthew J.

An edge strengthened substrate of a data storage disk and a method for fabricating same is disclosed. A strengthening agent is preferably applied to selected portions of a disk-shaped glass substrate to increase the overall strength of the glass substrate. In one embodiment, a strengthening agent is preferably applied along an inner diameter portion of a disk-shaped glass substrate. A binder is preferably mixed with the strengthening agent to limit the mobility of the strengthening agent to the selected inner diameter portion of the substrate during the strengthening process. The glass substrate is then heated to a diffusion temperature for a sufficient duration of time to permit diffusion of the strengthening agent into the glass substrate. Selective application of a strengthening agent to an outer diameter portion of the glass substrate may be performed to further strengthen the glass substrate. Further application of a strengthening agent to an intermediate diameter surface portion of the glass substrate defined substantially between the inner and outer diameter portions may be performed to further increase the strength of the glass substrate.

DETAILED DESCRIPTION The present invention is an edge strengthened substrate of a data storage disk and a method for fabricating same.
A strengthening agent is preferably applied to selected portions of a disk-shaped glass substrate to increase the overall strength of the glass substrate.
In one embodiment, a strengthening agent is preferably applied along an inner diameter portion of a disk-shaped glass substrate.
A binder is preferably mixed with the strengthening agent to limit the mobility of the agent to the selected inner diameter portion of the substrate during the strengthening process.
The glass substrate is then heated to a diffusion temperature for a sufficient duration of time to permit diffusion of the strengthening agent into the glass substrate.
Selective application of a strengthening agent to an outer diameter portion of the glass substrate may be performed to further strengthen the glass substrate.
Further application of a strengthening agent to an intermediate diameter surface portion of the glass substrate defined substantially between the inner and outer diameter portions may be performed to further increase the strength of the glass substrate.

Related patents

	Thermoplastic olefin resin composition and laminated film or sheet thereof What we claim is: 1. A thermoplastic olefin resin composition composed of a blend of (i) 5 to 95% by weight, based on the weight of the blend, of a random copolymer ...
	Blends of a propylene/.alpha.-olefin copolymer with isotactic prolypropylene According to this invention there is provided a composition consisting essentially of a blend of an elastomeric copolymer of 45-90 mole percent of propylene and 10-55 ...
	Acrylic multilayer polymer powder In light of these circumstances, the present inventors studied the structures of coagulated powders of relatively rigid acrylic multilayer polymers, and with a melt-...
	Process for extrusion We claim: 1. A process for the co-extrusion of an inner layer around a conductive medium and an outer layer around the inner layer comprising: (i) introducing into an ...
	Ethylene-.alpha.-olefin copolymer and composition, and film, laminate and electrical insulating material comprising same An object of the present invention to provide an ethylene-.alpha.-olefin copolymer excellent in various properties such as mechanical strength, moldability, thermal ...
	Thermoplastic elastomeric blend of monoolefin copolymer rubber, amorphous polypropylene resin and crystalline polyolefin resin I claim: 1. A thermoplastic elastomer which is a blend of: A. a monoolefin copolymer rubber which is a copolymer of ethylene and an alpha-monoolefin of the formula CH....
	Olefine thermoplastic elastomer sheet OF THE INVENTION The present invention is described in more detail. First, the olefin thermoplastic elastomer sheet of the present invention is described below. The ...
	Odor free polylactic acid modified aqueous emulsion paints free of volatile coalescing organic solvent OF THE INVENTION The air dry emulsion latex paint of this invention comprises a film forming matrix polymer of aqueous emulsion copolymerized ethylenically unsaturated ...
	Coextruded chewing gum containing a soft non-SBR gum core portion What is claimed is: 1. A coextruded chewing gum having a soft gum center portion, comprising an extruded soft gum core portion formed of chewing gum containing at least ...
	Aqueous dispersion of polymer composition We claim: 1. An aqueous dispersion of a polymer composition comprising (A) a copolymer which comprises (a.sub.1) a unit derived from a vinyl monomer having a ...

0.004
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved