Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
  • C07F7/1804—Compounds having Si-O-C linkages
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K3/00—Apparatus or processes for manufacturing printed circuits
  • H05K3/30—Assembling printed circuits with electric components, e.g. with resistors
  • H05K3/303—Assembling printed circuits with electric components, e.g. with resistors with surface mounted components
  • H05K3/305—Affixing by adhesive

Definitions

• This invention relates to compounds that contain both vinyl silane functionality and epoxy functionality and that can be used as adhesion promoters or curable compositions.
• Adhesive compositions are used in the fabrication and assembly of semiconductor packages and microelectronic devices, such as in the bonding of integrated circuit chips to lead frames or other substrates, and the bonding of circuit packages or assemblies to printed wire boards.
• Lead frames can be fabricated of 42Fe/58Ni alloy (Alloy 42), copper, or silver- or palladium-coated copper, and wire boards of ceramic or laminate, and adhesives that in general have good performance may be deficient when used on one or more of these substrates.
• this invention relates to compounds that contain both vinyl silane functionality and epoxy functionality.
• this invention is a curable composition, such as an adhesive, coating, or encapsulant composition, containing those compounds.
• DETAILED DESCRIPTION OF THE INVENTION [0005]
• the compounds of this invention contain at least one epoxy functionality and at least one vinyl silane functionality.
• these compounds can be prepared by the reaction of a glycidol or a glycidyl ether polyol with a vinyl silane.
• Suitable vinyl silanes include trivi ⁇ ylchlorosilane, methyl vinyl dichlorosilane, diphenyl vinyl chlorosilane and vinyl trichlorosilane.
• this invention is a curable composition, such as an adhesive, coating, encapsulant or sealant, containing the inventive compounds.
• the curable composition can be in the form of a paste prepared by standard blending or milling techniques, or can be a film prepared by film forming techniques as known in the art.
• the curable composition will include optionally a curing agent, and optionally a filler.
• the inventive epoxy/vinyl silane compounds can be the main component in the curable composition or can be added as an adhesion promoter to another curable resin.
• the amount of the epoxy/vinyl silane compound used in the curable composition will be an effective amount to promote adhesion and, in general, an effective amount will range from 0.005 to 20.0 percent by weight of the formulation.
• curable resins for use as the main component other than the inventive vinyl silanes include epoxies, electron donor resins (for example, vinyl ethers, thiol-enes, and resins that contain carbon to carbon double bonds attached to an aromatic ring and conjugated with the unsaturation in the aromatic ring, such as compounds derived from cinnamyl and styrenic starting compounds), and, electron acceptor resins (for example, fumarates, maleates, acrylates, and maleimides).
• electron donor resins for example, vinyl ethers, thiol-enes, and resins that contain carbon to carbon double bonds attached to an aromatic ring and conjugated with the unsaturation in the aromatic ring, such as compounds derived from cinnamyl and styrenic starting compounds
• electron acceptor resins for example, fumarates, maleates, acrylates, and maleimides
• Suitable curing agents are thermal initiators and photoinitiators present in an effective amount to cure the composition. In general, those amounts will range from 0.5% to 30%, preferably 1 % to 20%, by weight of the total organic material (that is, excluding any inorganic fillers) in the composition.
• Preferred thermal initiators include peroxides, such as butyl peroctoates and dicumyl peroxide, and azo compounds, such as 2,2'- azobis(2-methyl-propanenitrile) and 2,2'-azobis(2-methyl-butanenitrile).
• a preferred series of photoinitiators is one sold under the trademark Irgacure by Ciba Specialty Chemicals.
• both thermal initiation and photoinitiation may be desirable: the curing process can be started either by irradiation, followed by heat, or can be started by heat, followed by irradiation.
• the curable compositions will cure within a temperature range of 70°C to 250°C, and curing will be effected within a range of ten seconds to three hours. The actual cure profile will vary with the components and can be determined without undue experimentation by the practitioner.
• the formulations may also comprise nonconductive or thermally or electrically conductive fillers.
• Suitable conductive fillers are carbon black, graphite, gold, silver, copper, platinum, palladium, nickel, aluminum, silicon carbide, boron nitride, diamond, and alumina.
• Suitable nonconductive fillers are particles of vermiculite, mica, wollastonite, calcium carbonate, titania, sand, glass, fused silica, fumed silica, barium sulfate, and halogenated ethylene polymers, such as tetrafluoroethylene, trifluoro- ethylene, vinylidene fluoride, vinyl fluoride, vinylidene chloride, and vinyl chloride. If present, fillers generally will be in amounts of 20% to 90% by weight of the formulation.
• EXAMPLE ! General Synthetic Procedure: Reaction of alcohol with vinyl silane. One mole equivalent of alcohol and triethylamine are mixed in dry toluene at 0°C, to which is added one mole equivalent of vinyl silane dissolved in toluene. The mixture is allowed to react for four hours at room temperature, after which the solvent is evaporated to give the product.
• glycerol diglycidyl ether 14.11 g, 0.07 mole
• triethylamine 6.98 g, 0.07 mole
• toluene 50 mL
• Trivinyl chlorosilane (10.00 g, 0.07 mole) was added dropwise at 0 °C (performed in an ice bath) through a slow-add funnel. After addition was completed, the ice bath was removed and the mixture stirred at room temperature for four hours. The mixture was then filtered and the filtrate charged to a 250 mL round bottle flask. The solvent was removed under reduced pressure to give the product in 85 % yield.
• EPICLON EXA-7120 34.48 g, 0.07 mole
• triethylamine 6.98 g, 0.07 mole
• toluene 50 mL
• Trivinyl chlorosilane (10.00 g, 0.07 mole) was added dropwise at 0°C (performed in an ice bath) through a slow-add funnel. Once addition was completed, the ice bath was removed and the mixture stirred at room temperature for four hours. The mixture was filtered and the filtrate charged to a 250 mL round bottle flask. The solvent was removed under reduced pressure to give the product in 90% yield.
• This compound is prepared according to the general synthetic procedure in Example 1 by the reaction of glycidol with diphenyl vinyl chlorosilane.
• This compound is prepared according to the general synthetic procedure in Example 1 by the reaction of EPICLON EXA-7120 with methyl vinyl dichlorosilane, followed by reaction with glycidol according to the general synthetic procedure in Example 1.
• This compound is prepared according to the procedure in Example 1 by the reaction of glycidol with vi ⁇ yltrichlorosilane.
• EXAMPLE 11 Performance in curable compositions.
• a curable composition was prepared comprising a bismaleimide, a compound with styrenic functionality, an epoxy, curing agents, and 75% by weight silver. Vinyl silane/epoxy compounds from Examples 2, 3, 4, and 5 were added to this composition at 1 weight % and the individual curable compositions tested for adhesive strength as die attach adhesives.
• the adhesive was dispensed on a silver coated leadframe, a silicon die (120 X 1200 mil) was placed onto the adhesive, and the adhesive was cured on a hot plate at 200°C for 60 seconds. Ten assemblies for each adhesive were prepared. Each die was sheared from the leadframe at 90 degrees with a Dage 2400-PC Die Shear Tester at 240°C, and the results pooled and averaged and reported as Kilogram force.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Epoxy Resins (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25511434

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (4)

Citations (6)

Family Cites Families (3)

• 2001
  • 2001-09-28 US US09/966,454 patent/US6590018B2/en not_active Expired - Fee Related
• 2002
  • 2002-07-01 EP EP02752116A patent/EP1430063A1/en not_active Withdrawn
  • 2002-07-01 KR KR1020047004001A patent/KR100973777B1/ko not_active Expired - Fee Related
  • 2002-07-01 WO PCT/US2002/020613 patent/WO2003029255A1/en not_active Ceased
  • 2002-07-01 JP JP2003532503A patent/JP4309267B2/ja not_active Expired - Fee Related
  • 2002-09-27 TW TW091122782A patent/TWI303248B/zh active

Patent Citations (6)

Non-Patent Citations (6)

Also Published As

Similar Documents

Legal Events