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WO2012111641A1 - Substrat de del - Google Patents

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Publication number
WO2012111641A1
WO2012111641A1 PCT/JP2012/053325 JP2012053325W WO2012111641A1 WO 2012111641 A1 WO2012111641 A1 WO 2012111641A1 JP 2012053325 W JP2012053325 W JP 2012053325W WO 2012111641 A1 WO2012111641 A1 WO 2012111641A1
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WO
WIPO (PCT)
Prior art keywords
group
repeating unit
liquid crystal
crystal polyester
led substrate
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/053325
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English (en)
Japanese (ja)
Inventor
細田　朋也
光男 前田
岡本　敏
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Publication of WO2012111641A1 publication Critical patent/WO2012111641A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/852—Encapsulations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/007—Methods for continuous mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B29B7/726—Measuring properties of mixture, e.g. temperature or density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/60—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
    • C08G63/605—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds the hydroxy and carboxylic groups being bound to aromatic rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/852—Encapsulations
    • H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
    • H10W90/724—

Definitions

  • the present invention relates to an LED substrate having an insulating layer made of liquid crystal polyester.
  • the present invention also relates to an LED package using the LED substrate.
  • the insulating layer of the LED (light-emitting diode) substrate is required to have high heat resistance so that it can withstand the high temperatures when the LED element is mounted by soldering or during LED emission, and the dimensions change even at high temperatures.
  • the coefficient of linear expansion is required to be low, and further, the heat conductivity is required to be high so that heat can be easily radiated.
  • Patent Document 1 discloses a predetermined aromatic hydroxy as the material for the insulating layer of the LED substrate.
  • the insulating layer As disclosed in Patent Document 1, if liquid crystal polyester is used as the material of the insulating layer of the LED substrate, the insulating layer has high heat resistance, low linear expansion coefficient, and high thermal conductivity. From the viewpoint of improving reliability, in addition to these performances, water vapor barrier properties are required. Then, the objective of this invention is providing the board
  • the present invention comprises a repeating unit represented by the following formula (1), a repeating unit represented by the following formula (2), and a repeating unit represented by the following formula (3).
  • the content of the repeating unit containing 2,6-naphthylene group is 40 mol% or more with respect to the total amount of all repeating units on at least one surface of the insulating layer composed of the liquid crystal polyester, An LED substrate provided with a conductor layer is provided.
  • Ar 1 represents a 2,6-naphthylene group, a 1,4-phenylene group or a 4,4′-biphenylylene group.
  • Ar 2 and Ar 3 are each independently a 2,6-naphthylene group, 1,4 Represents a -phenylene group, a 1,3-phenylene group or a 4,4′-biphenylylene group, wherein the hydrogen atoms in the group represented by Ar 1 , Ar 2 or Ar 3 are each independently a halogen atom or an alkyl group; Alternatively, it may be substituted with an aryl group.
  • the present invention is composed of liquid crystal polyester, on at least one surface of an insulating layer having a water vapor permeability measured at a temperature of 40 ° C. and a relative humidity of 90% of 0.005 g / m 2 ⁇ 24 h or less, An LED substrate provided with a conductor layer is provided.
  • the present invention relates to an insulation composed of a liquid crystal polyester having a water vapor permeability of 0.005 g / m 2 ⁇ 24 h or less measured at a temperature of 40 ° C. and a relative humidity of 90% when a film having a thickness of 50 ⁇ m is formed.
  • an LED substrate in which a conductor layer is provided on at least one surface of the layer.
  • the present invention provides an LED package in which an LED element is disposed on the conductor layer of any one of the LED substrates.
  • the LED substrate of the present invention has an insulating layer excellent in water vapor barrier properties, and by using this, a highly reliable LED package can be obtained.
  • the liquid crystalline polyester constituting the insulating layer of the LED substrate of the present invention is a polyester that exhibits optical anisotropy when melted, and is preferably a repeating unit represented by the following formula (1) (hereinafter referred to as repeating unit (1 ), A repeating unit represented by the following formula (2) (hereinafter sometimes referred to as repeating unit (2)), and a repeating unit represented by the following formula (3) (hereinafter referred to as repeating unit). (3)).
  • Ar 1 represents a 2,6-naphthylene group, a 1,4-phenylene group or a 4,4′-biphenylylene group.
  • Ar 2 and Ar 3 are each independently a 2,6-naphthylene group, 1,4 -Represents a phenylene group, a 1,3-phenylene group or a 4,4′-biphenylylene group, wherein the hydrogen atom in the group represented by Ar 1 , Ar 2 or Ar 3 is independently a halogen atom or a carbon number (It may be substituted with an alkyl group of 1 to 10 or an aryl group of 6 to 20 carbon atoms.)
  • halogen atom a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom are mentioned.
  • alkyl group examples include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, n-hexyl group, 2-ethylhexyl group, Examples thereof include an n-octyl group and an n-decyl group, and the carbon number thereof is usually 1 to 10.
  • aryl group examples include a phenyl group, an o-tolyl group, an m-tolyl group, a p-tolyl group, a 1-naphthyl group, and a 2-naphthyl group, and the number of carbon atoms is usually 6-20.
  • the hydrogen atom is substituted with these groups, the number is usually 2 or less for each group represented by Ar 1 , Ar 2 or Ar 3 , and preferably 1 It is as follows.
  • the repeating unit (1) is a repeating unit derived from a predetermined aromatic hydroxycarboxylic acid.
  • the repeating unit (1) those in which Ar 1 is a 2,6-naphthylene group, that is, a repeating unit derived from 6-hydroxy-2-naphthoic acid is preferable.
  • the repeating unit (2) is a repeating unit derived from a predetermined aromatic dicarboxylic acid.
  • Ar 2 is a 2,6-naphthylene group, that is, a repeating unit derived from 2,6-naphthalenedicarboxylic acid, and Ar 2 is a 1,4-phenylene group, Repeating units derived from terephthalic acid are preferred.
  • the repeating unit (3) is a repeating unit derived from a predetermined aromatic diol.
  • Ar 3 is a 1,4-phenylene group, that is, a repeating unit derived from hydroquinone, and Ar 3 is a 4,4′-biphenylylene group, that is, 4,4′-. Repeating units derived from dihydroxybiphenyl are preferred.
  • repeating unit containing 2,6-naphthylene group in liquid crystal polyester that is, repeating unit (1) in which Ar 1 is 2,6-naphthylene group, repeating unit in which Ar 2 is 2,6-naphthylene group (2) and the total content of the repeating unit (3) in which Ar 3 is a 2,6-naphthylene group is the total amount of all repeating units (the mass of each repeating unit constituting the liquid crystal polyester is expressed by the formula of each repeating unit) By dividing by the amount, the substance amount equivalent amount (mole) of each repeating unit is obtained, and the sum thereof is 40 mol% or more.
  • a liquid crystal polyester film having excellent water vapor barrier properties By forming a liquid crystal polyester having such a predetermined repeating unit composition into a film, a liquid crystal polyester film having excellent water vapor barrier properties can be obtained.
  • the content of 2,6-naphthylene groups is preferably 50 mol% or more, more preferably 60 mol% or more, and further preferably 70 mol% or more.
  • the content of the repeating unit (1) is preferably 30 to 80 mol%, more preferably 40 to 70 mol%, still more preferably 45 to 65 mol, based on the total amount of all repeating units.
  • the content of the repeating unit (2) is preferably 10 to 35 mol%, more preferably 15 to 30 mol%, still more preferably 17.5 to 27.27%, based on the total amount of all repeating units.
  • the content of the repeating unit (3) is preferably from 10 to 35 mol%, more preferably from 15 to 30 mol%, still more preferably from 17.5 to mol based on the total amount of all repeating units. 27.5 mol%.
  • the liquid crystal polyester having such a predetermined repeating unit composition has an excellent balance between heat resistance and moldability.
  • the liquid crystalline polyester may have a repeating unit other than the repeating units (1) to (3) as necessary, but the content thereof is usually 10 moles relative to the total amount of all the repeating units. % Or less, preferably 5 mol% or less.
  • a typical example of a liquid crystalline polyester having high heat resistance and high melt tension is a repeating unit (1) in which Ar 1 is a 2,6-naphthylene group, that is, 6-hydroxy-2- with respect to the total amount of all repeating units.
  • the repeating unit derived from naphthoic acid is preferably 40 to 74.8 mol%, more preferably 40 to 64.5 mol%, still more preferably 50 to 58 mol%, and Ar 2 is a 2,6-naphthylene group.
  • the repeating unit (2) that is, the repeating unit derived from 2,6-naphthalenedicarboxylic acid is preferably 12.5 to 30 mol%, more preferably 17.5 to 30 mol%, and still more preferably 20 to 25 mol%.
  • repeating units Ar 2 is 1,4-phenylene group (2), i.e., repeating units derived from terephthalic acid, preferably 0.2 to 15 mol%, more preferably 0. To 12 mol%, more preferably having 2 to 10 mol%, the repeating units Ar 3 is 1,4-phenylene group (3), i.e., a repeating unit derived from hydroquinone, preferably 12.5 to 30 mol %, more preferably 17.5 to 30 mol%, more preferably having 20-25 mol%, and the content of the repeating unit (2) Ar 2 is 2,6-naphthylene group, Ar 2 is The total content of the repeating unit (2) which is a 2,6-naphthylene group and the repeating unit (2) wherein Ar 2 is a 1,4-phenylene group is preferably 0.5 mol times or more, more preferably It is 0.6 mol times or more.
  • the liquid crystalline polyester is a monomer that gives a repeating unit (1), that is, a predetermined aromatic hydroxycarboxylic acid, a monomer that gives a repeating unit (2), that is, a monomer that gives a predetermined aromatic dicarboxylic acid, and a repeating unit (3), That is, a predetermined aromatic diol is added to a total amount of monomers having 2,6-naphthylene groups, that is, a total amount of 6-hydroxy-2-naphthoic acid, 2,6-naphthalenedicarboxylic acid and 2,6-naphthalenediol.
  • the polymer can be produced by polymerization (polycondensation) so as to be 40 mol% or more based on the total amount of all monomers.
  • the aromatic hydroxycarboxylic acid, the aromatic dicarboxylic acid, and the aromatic diol may be independently replaced by a part or all of the polymerizable derivatives thereof.
  • polymerizable derivatives of a compound having a carboxyl group such as an aromatic hydroxycarboxylic acid and an aromatic dicarboxylic acid include those obtained by converting a carboxyl group into an alkoxycarbonyl group or an aryloxycarbonyl group, and a carboxyl group as a haloformyl.
  • a group formed by converting a carboxyl group into an acyloxycarbonyl group a group formed by converting a carboxyl group into an acyloxycarbonyl group.
  • polymerizable derivatives of hydroxyl group-containing compounds such as aromatic hydroxycarboxylic acids and aromatic diols include those obtained by acylating a hydroxyl group and converting it to an acyloxyl group.
  • the liquid crystalline polyester is preferably produced by melt polymerizing monomers and solid-phase polymerizing the obtained polymer (prepolymer). Thereby, liquid crystalline polyester with high heat resistance and high melt tension can be manufactured with good operability.
  • Melt polymerization may be carried out in the presence of a catalyst.
  • this catalyst include metal compounds such as magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, potassium acetate, and antimony trioxide, Nitrogen-containing heterocyclic compounds such as N, N-dimethylaminopyridine and N-methylimidazole, and nitrogen-containing heterocyclic compounds are preferably used.
  • the liquid crystal polyester having the predetermined repeating unit composition thus obtained is excellent in water vapor barrier properties.
  • the liquid crystal polyester has a flow start temperature of preferably 280 ° C. or higher, more preferably 290 ° C. or higher, further preferably 295 ° C. or higher, and is usually 380 ° C. or lower, preferably 350 ° C. or lower.
  • a flow start temperature preferably 280 ° C. or higher, more preferably 290 ° C. or higher, further preferably 295 ° C. or higher, and is usually 380 ° C. or lower, preferably 350 ° C. or lower.
  • the flow start temperature is higher, the heat resistance and melt tension are more likely to be improved. However, if the flow start temperature is too high, a high temperature is required for melting, and thermal deterioration tends to occur during molding.
  • the flow start temperature is also called flow temperature or flow temperature, and is 4 ° C./min under a load of 9.8 MPa (100 kg / cm 2 ) using a capillary rheometer having a nozzle with an inner diameter of 1 mm and a length of 10 mm.
  • This is a temperature at which the melt viscosity shows 4800 Pa ⁇ s (48,000 poise) when the heated melt of the liquid crystal polyester is extruded from the nozzle at a temperature rising rate of 5 ° C., which is a measure of the molecular weight of the liquid crystal polyester (See Naoyuki, “Liquid Crystal Polymers—Synthesis / Molding / Applications”, CMC Corporation, June 5, 1987, p. 95).
  • the liquid crystal polyester having the predetermined repeating unit composition thus obtained is excellent in water vapor barrier properties and used as a material for the tab carrier tape of the present invention.
  • the liquid crystal polyester in the present invention preferably has a water vapor transmission rate measured at a temperature of 40 ° C. and a relative humidity of 90% when formed into a film having a thickness of 50 ⁇ m, preferably 0.05 g / m 2 ⁇ 24 h or less, More preferably, it is 0.01 g / m ⁇ 2 > * 24h or less, More preferably, it is 0.005 g / m ⁇ 2 > * 24h or less.
  • the liquid crystal polyester may be blended with other components as necessary to form a composition.
  • other components include fillers, thermoplastic resins other than liquid crystal polyesters, and additives.
  • the ratio of the liquid crystal polyester in the entire composition is preferably 80% by mass or more, and more preferably 90% by mass or more.
  • fillers include glass fibers such as milled glass fibers and chopped glass fibers, potassium titanate whiskers, alumina whiskers, aluminum borate whiskers, silicon carbide whiskers, silicon nitride whiskers, and other metal or non-metallic whiskers.
  • glass fiber, mica, talc and carbon fiber are preferably used.
  • the filler may be surface-treated as necessary, and examples of the surface treatment agent include reactivity such as a silane coupling agent, a titanate coupling agent, and a borane coupling agent.
  • examples of the surface treatment agent include reactivity such as a silane coupling agent, a titanate coupling agent, and a borane coupling agent.
  • Examples include coupling agents and lubricants such as higher fatty acids, higher fatty acid esters, higher fatty acid metal salts, and fluorocarbon surfactants.
  • thermoplastic resins other than liquid crystal polyester include polycarbonate, polyamide, polysulfone, polyphenylene sulfide, polyphenylene ether, polyether ketone, and polyetherimide resin.
  • additives include mold release improvers such as fluororesins and metal soaps, nucleating agents, antioxidants, stabilizers, plasticizers, lubricants, anti-coloring agents, coloring agents, ultraviolet absorbers, antistatic agents, Examples include lubricants and flame retardants.
  • a liquid crystal polyester film constituting the insulating layer of the LED substrate of the present invention can be obtained by forming a film of the liquid crystal polyester thus obtained or a composition thereof.
  • the film forming method include an extrusion molding method, a press molding method, a solution casting method, and an injection molding method, and the extrusion molding method is preferable.
  • the extrusion molding method include a T-die method and an inflation method. In the T-die method, uniaxial stretching or biaxial stretching may be performed.
  • the draw ratio (draft ratio) of the uniaxially stretched film is usually 1.1 to 40, preferably 10 to 40, more preferably 15 to 35.
  • the stretch ratio in the MD direction (extrusion direction) of the biaxial film is usually 1.2 to 40 times, and the stretch ratio in the TD direction (direction perpendicular to the extrusion direction) of the biaxial film is usually 1.2 to 20 times. Is double.
  • the thickness of the liquid crystal polyester film is preferably 5 to 100 ⁇ m, more preferably 10 to 75 ⁇ m, and further preferably 15 to 75 ⁇ m. If it is too thin, the strength will be insufficient, and if it is too thick, the flexibility will be insufficient.
  • the liquid crystal polyester film thus obtained has an excellent water vapor barrier property and is used as an insulating layer of the LED substrate of the present invention.
  • the liquid crystal polyester film water vapor transmission rate being measured at a temperature 40 ° C. and a relative humidity of 90%, preferably from 0.05g / m 2 ⁇ 24h or less, more preferably 0.01g / m 2 ⁇ 24h or less, further Preferably, it is 0.005 g / m 2 ⁇ 24 h or less.
  • a laminated film obtained by laminating a plurality of liquid crystal polyester films or laminating another film such as a thermoplastic resin film on the liquid crystal polyester film is also used as the insulating layer of the LED substrate of the present invention.
  • a laminated film obtained by providing a water vapor barrier layer or other functional layer is also an insulating layer of the LED substrate of the present invention.
  • the water vapor barrier layer is provided on at least one surface of the liquid crystal polyester film.
  • surface of a liquid crystal polyester film providing on the back surface (surface opposite to the surface where an LED element is arrange
  • Substances constituting the water vapor barrier layer include at least one element selected from the group consisting of aluminum, silicon, titanium, chromium, iron, cobalt, nickel, copper, zinc, silver and gold, an oxide, and a nitride And oxynitrides are preferable, and two or more of them may be used as necessary.
  • a method for forming the water vapor barrier layer for example, a vapor deposition method, a sputtering method, a PVD method such as an ion plating method, a CVD method such as a plasma CVD method, a thermal CVD method, a laser CVD method, a sol-gel method, a plating method, etc. And wet methods such as a coating method. Further, a foil prepared or obtained separately may be bonded to the liquid crystal polyester film.
  • the liquid crystal polyester film may be subjected to a surface treatment as necessary.
  • the surface treatment method include corona discharge treatment, flame treatment, sputtering treatment, solvent treatment, UV treatment, and plasma treatment.
  • an LED substrate is obtained by providing, on at least one surface thereof, a conductor layer that becomes a wiring electrically connected to the LED element after mounting the LED element.
  • a conductor layer 5 is provided on one surface of the insulating layer 4, and heat generated from the LED element 7 during the operation of the LED package 1 is efficiently externally provided on the other surface.
  • An LED substrate 2 is obtained by providing the heat dissipation layer 3 that dissipates heat.
  • the conductor layer 5 is excellent in conductivity, so that the electrode formed on the laminated film may be a transparent electrode, but it need not be transparent.
  • a conductive paste containing a conductive material such as a metal such as Al or Cu or carbon or a metal such as Al or Cu may be used.
  • the formation method of the conductor layer is not particularly limited, and a known formation method such as vapor deposition, sputtering, ion plating method, plating, coating, or printing may be used.
  • As the heat dissipation layer 3 since it is excellent in heat dissipation, a material containing copper or aluminum, that is, a metal material is preferable, and a material made of copper or a copper alloy is preferable.
  • a method of laminating the conductor layer 5 and the heat dissipation layer 3 with the insulating layer (liquid crystal polyester film) 4 for example, a method of laminating a metal foil such as a copper foil on the liquid crystal polyester film 4, The method of coating on the polyester film 4 is mentioned.
  • Examples of the method of laminating the metal foil include a method of bonding the metal foil and the liquid crystal polyester film 4 using an adhesive, and a method of heat-sealing by hot pressing.
  • an adhesive for example, an epoxy resin adhesive or an acrylic resin adhesive can be used.
  • the processing conditions for hot pressing can be optimized as appropriate depending on the scale and shape of the liquid crystal polyester film 4 to be used, the thickness and type of the metal foil to be used, etc., but it is particularly preferable to hot press under vacuum.
  • This treatment temperature is preferably determined based on the temperature condition of the solid layer polymerization performed when producing the liquid crystal polyester to be hot pressed. Specifically, the maximum temperature of the solid layer polymerization is T max [° C.]. At this time, it is preferable to perform hot pressing at a temperature exceeding T max, and it is more preferable to perform hot pressing at a temperature of T max +5 [° C.] or higher.
  • the upper limit of the temperature of the hot press is selected so as to be lower than the decomposition temperature of the liquid crystal polyester contained in the liquid crystal polyester film 4 to be used, but it is preferable that the upper limit of the temperature is 30 ° C. or lower.
  • the decomposition temperature referred to here is determined by a known means such as thermogravimetry analysis.
  • the time for hot pressing is usually 1 to 30 hours, and the pressure is usually 1 to 30 MPa.
  • Examples of the coating method of metal fine particles such as copper fine particles include a plating method, a screen printing method, and a sputtering method. Of these, the plating method is preferable, and specifically, electroless plating or electrolytic plating is preferably used.
  • the conductor layer 5 is preferably heat-treated, and the conditions for the heat treatment are also equivalent to the conditions described as the conditions for the hot press. Is adopted.
  • the operation is to laminate the conductor layer 5 and the heat dissipation layer 3 on the liquid crystal polyester film 4 using a copper foil.
  • a copper foil is advantageous in terms of economy.
  • Etching is usually used to form wiring by patterning the conductor layer 5.
  • masking is performed so that the wiring pattern becomes a predetermined pattern.
  • the latter conductor layer 5 portion is wet-processed (chemical treatment). ) Is removed by etching.
  • chemical treatment used for this etching process, ferric chloride aqueous solution is mentioned, for example.
  • a commercially available etching resist or dry film may be used.
  • the etching resist and dry film are removed from the masked conductor layer 5 with acetone or a sodium hydroxide aqueous solution. In this way, a predetermined wiring can be formed.
  • the LED element 7 is mounted on the conductor layer 5 by first applying solder on the conductor layer 5, placing the LED element 7 thereon, and then passing the reflow furnace or the like to melt the solder.
  • the LED element 7 is preferably surface-mounted, but the LED element 7 and the conductor layer 5 may be electrically connected by wire bonding.
  • transfer molding refers to a technique of press-fitting a resin into a clamped mold.
  • the LED package 1 thus obtained may be provided with a via hole that connects the conductor layer 5 and the heat dissipation layer 3. Thereby, the heat generated in the LED element 7 and the conductor layer 5 can be efficiently flowed to the heat radiating layer 3 side, so that efficient heat radiation can be performed.
  • the LED package 1 may be a chip type or a film type.
  • Production Example 2 In the same reactor as in Production Example 1, 911 g (6.6 mol) of p-hydroxybenzoic acid, 274 g (1.65 mol) of terephthalic acid, 91 g (0.55 mol) of isophthalic acid, 4,4′-dihydroxybiphenyl 409 g (2.2 mol), 1235 g of acetic anhydride (12.1 mol), and 0.17 g of 1-methylimidazole as a catalyst were added, and the gas in the reactor was replaced with nitrogen gas, followed by stirring under a nitrogen gas stream While raising the temperature from room temperature to 150 ° C. over 15 minutes, the mixture was refluxed at 150 ° C. for 1 hour.
  • the mixture was cooled to obtain a powdery liquid crystal polyester.
  • this liquid crystal polyester 60 mol% of the repeating unit (1) in which Ar 1 is a 1,4-phenylene group, 15 mol% of the repeating unit (2) in which Ar 2 is a 1,4-phenylene group, and Ar 2 is 5% by mole of the repeating unit (2) which is a 1,3-phenylene group and 20% of the repeating unit (3) whose Ar 3 is a 4,4′-biphenylylene group, and its flow initiation temperature is 327 ° C. there were.
  • Example 1 The liquid crystalline polyester obtained in Production Example 1 was granulated with a twin-screw extruder ("PCM-30" by Ikekai Co., Ltd.), pelletized, and then supplied to a single-screw extruder (screw diameter 50 mm). It was melted, extruded from a T die (lip length: 300 mm, lip clearance: 1 mm, die temperature: 350 ° C.) and cooled to obtain a liquid crystal polyester film having a thickness of 25 ⁇ m.
  • This liquid crystal polyester film has a water vapor permeability of 0.011 g / m 2 ⁇ 24 h, and is excellent in water vapor barrier properties as a liquid crystal polyester film serving as an insulating layer of an LED substrate.
  • Example 2 The liquid crystalline polyester obtained in Production Example 1 was granulated with a twin-screw extruder ("PCM-30" by Ikekai Co., Ltd.), pelletized, and then supplied to a single-screw extruder (screw diameter 50 mm). It was melted, extruded from a T-die (lip length 300 mm, lip clearance 1 mm, die temperature 350 ° C.) into a film and cooled to obtain a liquid crystal polyester having a thickness of 50 ⁇ m.
  • the liquid crystal polyester film has a water vapor permeability of 0.0030 g / m 2 ⁇ 24 h, and is excellent in water vapor barrier properties as a liquid crystal polyester film serving as an insulating layer of the LED substrate.
  • Example 3 A 200 nm thick transparent electrode (ITO film) was formed at a substrate temperature of 180 ° C. using ITO (Indium Tin Oxide) on the opposite surface of the laminated film obtained in Example 2 on which the gas barrier layer was formed by ion plating. The sheet resistance of the transparent electrode formed on this laminated film was measured and found to be 9.1 ⁇ / ⁇ .
  • ITO Indium Tin Oxide
  • Comparative Example 1 The liquid crystalline polyester obtained in Production Example 2 was granulated with a twin-screw extruder ("PCM-30" from Ikekai Co., Ltd.), pelletized, and then supplied to a single-screw extruder (screw diameter 50 mm). It was melted and extruded from a T die (lip length 300 mm, lip clearance 1 mm, die temperature 350 ° C.) into a film and cooled to obtain a liquid crystal polyester film having a thickness of 50 ⁇ m.
  • the water vapor permeability of this liquid crystal polyester film is 0.343 g / m 2 ⁇ 24 h, and the water vapor barrier property is insufficient as a liquid crystal polyester film serving as an insulating layer of the LED substrate.
  • Comparative Example 2 The powdered liquid crystalline polyester obtained in Production Example 2 was granulated with a twin screw extruder ("PCM-30" manufactured by Ikegai Co., Ltd.) and pelletized, and then a single screw extruder (screw diameter 50 mm). And melted, extruded from a T-die (lip length 300 mm, lip clearance 1 mm, die temperature 350 ° C.) and cooled to obtain a liquid crystal polyester film having a thickness of 50 ⁇ m.
  • the water vapor permeability of this liquid crystal polyester film is 0.080 g / m 2 ⁇ 24 h, and the water vapor barrier property is insufficient as a liquid crystal polyester film serving as an insulating layer of the LED substrate.
  • Comparative Example 3 About the laminated film obtained in Comparative Example 2, a transparent electrode having a thickness of 200 nm was formed on the opposite surface of the gas barrier layer formed by ion plating method using ITO (Indium Tin Oxide) at a substrate temperature of 180 ° C. When the sheet resistance of the transparent electrode formed on this laminated film was measured, it was 12.3 ⁇ / ⁇ .
  • ITO Indium Tin Oxide
  • SYMBOLS 1 ... LED package, 2 ... LED board, 3 ... Heat dissipation layer, 4 ... Insulating layer (liquid crystal polyester layer), 5 ... Conductive layer, 6 ... Sealing layer, 7 ... LED elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Led Device Packages (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

L'objet de la présente invention est de fournir un substrat de DEL présentant une couche isolante dotée d'une excellente performance de barrière à la vapeur d'eau. La présente invention concerne un substrat de DEL comprenant une couche conductrice disposée sur au moins une surface d'une couche isolante comprenant un polyester cristal liquide présentant une unité structurale représentée par la formule (1), une unité structurale représentée par la formule (2) et une unité structurale représentée par la formule (3), des unités structurales contenant des groupes de 2,6-naphthylène constituant au moins 40 mol% de toutes les unités structurales dans ledit polyester cristal liquide. (1) -O-Ar1-CO- (2) -CO-Ar2-CO- (3) -O-Ar3-O- (Ar1 représente un groupe 2,6-naphthylène, un groupe 1,4-phénylène ou un groupe 4,4'-biphénylène. Ar2 et Ar3 représentent chacun indépendamment un groupe 2,6-naphthylène, un groupe 1,4-phénylène, un groupe 1,3-phénylène, ou un 4,4'-biphénylène.)
PCT/JP2012/053325 2011-02-16 2012-02-14 Substrat de del Ceased WO2012111641A1 (fr)

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JP6451579B2 (ja) * 2015-09-30 2019-01-16 日亜化学工業株式会社 発光装置
JP6809972B2 (ja) * 2016-04-14 2021-01-06 住友化学株式会社 積層フィルム、積層フィルムの製造方法及びｌｅｄ搭載基板
JP2023515975A (ja) 2020-02-26 2023-04-17 ティコナ・エルエルシー 電子デバイス

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009262444A (ja) * 2008-04-25 2009-11-12 Dainippon Printing Co Ltd ガスバリア性シート及びその製造方法
JP2010114427A (ja) * 2008-10-08 2010-05-20 Sumitomo Chemical Co Ltd チップ型ｌｅｄパッケージ用基板
JP2010135782A (ja) * 2008-11-10 2010-06-17 Sumitomo Chemical Co Ltd 太陽電池

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009262444A (ja) * 2008-04-25 2009-11-12 Dainippon Printing Co Ltd ガスバリア性シート及びその製造方法
JP2010114427A (ja) * 2008-10-08 2010-05-20 Sumitomo Chemical Co Ltd チップ型ｌｅｄパッケージ用基板
JP2010135782A (ja) * 2008-11-10 2010-06-17 Sumitomo Chemical Co Ltd 太陽電池

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