EP3224320A1 - Encapsulation de composants electroniques dans des materiaux polymeres - Google Patents
Encapsulation de composants electroniques dans des materiaux polymeresInfo
- Publication number
- EP3224320A1 EP3224320A1 EP15798036.8A EP15798036A EP3224320A1 EP 3224320 A1 EP3224320 A1 EP 3224320A1 EP 15798036 A EP15798036 A EP 15798036A EP 3224320 A1 EP3224320 A1 EP 3224320A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyorganosiloxane
- electronic component
- bearing
- per molecule
- groups
- 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.)
- Withdrawn
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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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
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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
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W74/00—Encapsulations, e.g. protective coatings
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/01—Manufacture or treatment
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/40—Encapsulations, e.g. protective coatings characterised by their materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/40—Encapsulations, e.g. protective coatings characterised by their materials
- H10W74/47—Encapsulations, e.g. protective coatings characterised by their materials comprising organic materials, e.g. plastics or resins
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/40—Encapsulations, e.g. protective coatings characterised by their materials
- H10W74/47—Encapsulations, e.g. protective coatings characterised by their materials comprising organic materials, e.g. plastics or resins
- H10W74/476—Organic materials comprising silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/05—Polysiloxanes containing silicon bound to hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/07—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
- C08J2483/05—Polysiloxanes containing silicon bound to hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
- C08J2483/07—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/05—Polymer mixtures characterised by other features containing polymer components which can react with one another
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W76/00—Containers; Fillings or auxiliary members therefor; Seals
- H10W76/40—Fillings or auxiliary members in containers, e.g. centering rings
- H10W76/42—Fillings
- H10W76/47—Solid or gel fillings
Definitions
- the present invention relates to the use of polysiloxane-based polymer materials for encapsulating power electronics. It relates to articles comprising at least one electronic component encapsulated in a polysiloxane-based polymer material, in particular power modules for automotive and aeronautical electronics, as well as a process for their manufacture. It relates in particular to the materials obtained from a crosslinked polysiloxane resin formulated in two parts.
- Heat-cured, two-part silicone resins have been used in a variety of industrial applications because of their thermal stability, dielectric, mechanical, chemical resistance and resistance to atmospheric degradation. In the electronics industry, these resins have been used as encapsulating agents and coating compounds for electronic devices such as integrated circuits. Such applications are described in particular in EP247492, EP1295905.
- the temperature range to which these components are subjected is very wide, from -70 to 300 ° C, and it has been found that the two-part polysiloxane resins currently used for this application does not have sufficient resistance to extreme temperatures. This is manifested by the degradation of the material at high temperatures and stiffening at low temperatures.
- Another objective is to have formulations devoid of volatile compounds, such as solvents, for example.
- the material should also have good adhesion to the substrate and an elastic modulus as low as possible. Finally it is desirable that it can be prepared with a heat treatment of short duration.
- US8440312 describes thermal interface materials obtained from a cross-linked polysiloxane resin formulated in two parts. However, these materials include significant amounts of electrical thermal and insulating conductive fillers that are unsuitable for electronic component encapsulating materials. They are prepared with organic solvents which are then evaporated. The mechanical properties of these materials at very low temperatures low or very high are not studied in this document and do not correspond to the constraints of the application concerned.
- US8278408 discloses fast-curing, long-storage resins obtained from a cross-linked polysiloxane resin formulated in two parts. These resins are used in electronics applications as space filling material between two substrates. These compositions include additives such as silane coupling agents, dicarboxylic acid esters, and fillers that are unsuitable for electronic component encapsulating materials. They are prepared with organic solvents which are then evaporated. The mechanical properties of these materials at very low or very high temperatures are not studied in this document and do not correspond to the constraints of the application concerned.
- EP2581954 discloses encapsulating materials for heat generating optical devices such as LEDs. They are intended to serve as connecting material between an LED and its support. These materials are obtained from a cross-linked polysiloxane resin formulated in two parts. They include thermal conductive fillers that are unsuitable for encapsulating materials of electronic components. The thermal and mechanical stability of the materials obtained is not mentioned in this document.
- the Applicant has now discovered a compound which can be used in heat-curable, two-part silicone resins, which significantly eliminates the aforementioned problems and allows the coating of elements such as power modules for heat transfer. automotive and aeronautical electronics.
- a first object of the invention consists of an electronic component comprising at least one semiconductor chip, at least one substrate, the semiconductor chip being encapsulated in a polyorganosiloxane-based resin, characterized in that:
- the polyorganosiloxane resin results from the hardening of a composition comprising at least:
- a part (B) comprising at least one polyorganosiloxane (B1) which contains at least two hydrosilyl Si-H reactive groups per molecule,
- At least one hydrosilylation catalyst (Cl) is At least one hydrosilylation catalyst (Cl),
- the invention further relates to the use of these polyorganosiloxane resins to encapsulate a semiconductor chip of an electronic component.
- the invention also relates to a method for manufacturing an electronic component which comprises at least the preparation of a polyorganosiloxane-based resin, this preparation comprising the mixture of part (A), part (B) and catalyst (Cl). According to one embodiment of the invention, the sum of the masses of (Al) and of
- (B1) represents from 95 to 100% of the total mass of the composition.
- the polyorganosiloxane (Al) is chosen from polydimethylsiloxanes, copolymers and terpolymers based on dimethylsiloxane, methylphenylsiloxane and diphenylsiloxane, bearing unsaturated vinyl groups.
- the polyorganosiloxane (B 1) is chosen from polydimethylsiloxanes carrying dimethylhydrogen siloxane end groups, copolymers and terpolymers based on dimethylsiloxane, methylhydrogensiloxane, methylphenylsiloxane, phenylhydrogenosiloxane and diphenylsiloxane bearing trimethylsiloxane or dimethylhydrogensiloxane end groups.
- the polyorganosiloxane (B 1) is chosen from polydimethylsiloxanes bearing dimethylhydrogensiloxane end groups.
- the polyorganosiloxane (B1) comprises:
- the catalyst (Cl) is chosen from platinum-based metal and organometallic catalysts.
- the electronic component is a power module.
- the mixture of parts (A), (B) and catalyst (Cl) is followed by heating.
- the polyorganosiloxane resin used in the invention comprises at least three components:
- the polyorganosiloxane (Al) may be linear or branched, it may be a homopolymer or a copolymer.
- the unsaturated group can be a vinyl, allyl, butenyl, hexenyl group. Preferably the unsaturated group is a vinyl.
- the unsaturated groups may be placed in the terminal position and / or pendant with respect to the polyorganosiloxane chain.
- the other organic groups of the (Al) chain may be chosen in a known manner from saturated, unsaturated or aromatic monovalent organic groups.
- they are chosen from saturated or aromatic monovalent organic groups comprising from 1 to 20 carbon atoms.
- alkyl groups such as methyl, ethyl, propyl, pentyl, octyl, undecyl, and octadecyl
- cycloalkyls such as cyclopentyl and cyclohexyl
- aromatic compounds such as phenyl, tolyl, xylyl, benzyl, and 2-phenylethyl.
- the polyorganosiloxane (Al) is preferably chosen from polydimethylsiloxanes, copolymers and terpolymers based on dimethylsiloxane, methylphenylsiloxane and diphenylsiloxane bearing unsaturated vinyl groups.
- the polyorganosiloxane (Al) may be chosen from polydimethylsiloxanes and poly (dimethylsiloxane-co-methylphenylsiloxane) bearing dimethylvinyl siloxane end groups.
- the vinyl groups represent from 0.8 to 1.8% of the substituents of the polyorganosiloxane (Al), advantageously from 1 to 1.5% of the substituents.
- Such polymers are commercially available, they are part of a two-part product ready to mix: Sylgard 527 ® (Dow Corning) and Nusil 8250 ® (Nusil) can be mentioned.
- Part (A) may be composed of a mixture of polyorganosiloxanes (Al), the different polymers being distinguished by their molecular weight, or by the chemical structure of their repeating units.
- the portion (A) may comprise other polymers, additives, stabilizers, plasticizers, inorganic fillers conventionally used in the polymer formulations.
- Part A may also contain the catalyst (Cl). In some ready-to-mix commercial formulations, the catalyst (Cl) is present in Part A.
- Part (B) comprises at least one polyorganosiloxane (B1) which contains at least two hydrosilyl Si-H reactive groups per molecule.
- This compound (B1) makes it possible to crosslink the polymer (Al) by a hydrosilylation reaction.
- the polyorganosiloxane (B1) can be linear, branched or cyclic, it can be a homopolymer or a copolymer.
- the Si-bonded hydrogens can be placed in the terminal position and / or pendant to the polyorganosiloxane chain.
- the other organic groups in the (B1) chain may be chosen in a known manner from saturated, unsaturated or aromatic monovalent organic groups. Preferably, they are chosen from saturated or aromatic monovalent organic groups comprising from 1 to 20 carbon atoms.
- alkyl groups such as methyl, ethyl, propyl, pentyl, octyl, undecyl and octadecyl; cycloalkyls such as cyclopentyl and cyclohexyl; aromatics such as phenyl, tolyl, xylyl, benzyl and 2-phenylethyl.
- the polyorganosiloxane (B1) may be chosen from polydimethylsiloxanes carrying dimethylhydrogenosiloxane end groups, poly (dimethylsiloxane-co-methylhydrogensiloxane) bearing trimethylsiloxane or dimethylhydrogenosiloxane end groups, and cyclic polyhydrogénométhylsiloxanes. These polymers may also contain phenyl groups, which are very interesting in the context of the low temperature application.
- Advantageously (B1) is chosen from polydimethylsiloxanes carrying end groups dimethylhydrogen siloxane, copolymers and terpolymers based on dimethylsiloxane, methylhydrogensiloxane, methylphenylsiloxane, phenylhydrogensiloxane and diphenylsiloxane bearing end groups trimethylsiloxane or dimethylhydrogensiloxane.
- the SiH groups represent from 3 to 35% of the substituents of the polyorganosiloxane (B1), advantageously from 4 to 30% of the substituents.
- the number-average molecular mass (Mn) of (B1) is advantageously
- (B) can be composed of a mixture of polyorganosiloxanes (B1), the different polymers being distinguished by their molecular weight, or by the chemical structure of their repeating units.
- Advantageously (B1) comprises at least two polyorganosiloxanes carrying at least two hydrosilyl Si-H reactive groups per molecule, which differ in their molecular weight.
- Si-H per molecule and number average molecular weight (Mn) ranging from 10,000 to 50000 g / mol are commercially available and are part of a two-part ready-to-mix product: Sylgard 527 ® (Dow Corning) and Nusil 8250 ® (Nusil).
- the composition (B) additionally comprises a polyorganosiloxane bearing vinyl reactive groups belonging to category (A). Part of the polyorganosiloxane carrying vinyl reactive groups (A) can thus be premixed with the polyorganosiloxane bearing Si-H groups.
- Polyorganosiloxanes carrying at least two hydrosilyl Si-H reactive groups per molecule and number-average molecular weight (Mn) ranging from 200 to 5000 g / mol are commercially available, in particular D 4 H ® and HMS products. -151 ® and DMS-H11 ® marketed by the company Gelest.
- composition (B) may comprise other polymers, additives, stabilizers, plasticizers, inorganic fillers conventionally used in the polymer compositions.
- the component (Cl) is a hydrosilylation catalyst.
- (Cl) is preferably chosen from metal and organometallic catalysts. It is chosen for example from a platinum group metal such as: platinum, rhodium, ruthenium, palladium, osmium or metal iridium or an organometallic compound thereof, or a mixture of such compounds. Examples include chloroplatinic acid, chloroplatinic acid hexahydrate, platinum dichloride, and complexes of these compounds with low molecular weight organopolysiloxanes or platinum microencapsulated platinum compounds.
- Ingredient (Cl) is added to the composition in an amount ranging from 0.1 ppm to 5000 ppm, preferably from 1 to 1000 ppm, advantageously from 5 to 500 ppm by weight of platinum group metals relative to the mass of the curable composition.
- the resin composition comprises inorganic fillers
- these may represent up to 70% by weight of the mass of the resin.
- these represent at most 10% by weight of the mass of the resin.
- the sum of the masses of (Al) and (Bl) represents from 95 to 100% by weight of the total mass of the composition, preferably from 98 to 100%, and still more preferably from 99 to 100% by weight. 100%.
- the resulting non-crosslinked composition is poured onto the substrate on which the electronic chip (s) is placed, in the housing of the power module allowing to avoid the flow of the composition.
- a heat treatment is applied at a temperature which makes it possible to increase the kinetics of the hydrosilylation reaction.
- Figure 1 Schematic representation of a power module 1
- Figure 2 graph representing the% by weight of soluble fraction (ordinate) as a function of% by mass of polyorganosiloxane HMS-151 ® (abscissa) added in portions (B) of Nusil 8250 gels (Gl) and Sylgard 527 (G2)
- FIG. 3 graph showing the storage modulus (ordinate) as a function of temperature (abscissa) for the Nusil 8250 ® Gel (G0) and for the gels obtained by adding in the Nusil 8250 ® Gel: 3.5 weight percent ( G3) and 6.1 weight percent (G4) of polyorganosiloxane HMS-151 ®
- the power module 1 comprises a substrate 6, on which are placed two electronic chips 4.
- Metal connectors 5 are placed between the chips 4 and the substrate 6.
- the chips 4 and the connectors 5 are encapsulated in a gel 3 and placed in a housing 2.
- the substrate 6 is separated from a cold plate 8 by an interface material 7 such that a thermal grease.
- the housing may optionally be closed by a cover (not shown).
- the precursors of commercial two-component silicone gel GEL 8250 from Nusil and Sylgard 527 from Dow Corning were used.
- the precursors of GEL 8250 are poly (diphenylsiloxane-co-dimethylsiloxane) copolymers, in which 5% of the substituents are phenyl groups, whereas the precursors of Sylgard 527 are polydimethylsiloxane (PDMS) without phenyl group.
- PDMS polydimethylsiloxane
- crosslinking is carried out by a hydrosilylation reaction between hydrogenosilane (Si-H) functional groups and vinyl functional groups in the presence of a platinum-based catalyst (Scheme 1).
- Part A contains the vinyl functional precursors and the platinum catalyst, and the other Part B contains precursors bearing vinyl and Si-H functions.
- Table 1 Number and weight average molar masses, polydispersity indices and viscosity of the precursors of commercial silicone gels
- HMS-151 A poly (dimethylsiloxane-co-methylhydrogensiloxane) copolymer (HMS-151):
- this crosslinker is 2 and its molecular weight determined by 1H NMR of 1135 g / mol. 6.5% of the substituents are Si-H.
- this crosslinking agent is 4 and its molar mass is 240.5 g / mol.
- New gels were therefore prepared by mixing as previously parts A and B of GEL 8250 or Sylgard 527 in equimassic ratio 50/50, and adding the selected crosslinking agent in different proportions.
- the proportions of crosslinking agent are expressed in weight of crosslinking agent relative to the mass of the precursors of GEL 8250 or Sylgard 527 gels. After degassing, the mixture is molded as described above and then placed in the oven for 30 min at 150 ° C. The formation rate of the networks as well as the mechanical properties of the gels obtained were then analyzed.
- compositions prepared have an Si-H / Si-vinyl molar ratio ranging from 0.3 to 1.2.
- FIG. 1 illustrates the mass percentage of soluble fraction as a function of the weight percentage of added HMS-151®.
- the soluble fractions were measured on GEL 8250 (G1) and Sylgard 527 (G2) gels synthesized by adding HMS-151® in a ratio such that the Si-H / Si-vinyl ratio varies between 0.5 and 1.2. (ie between 1 and 5 m of HMS-151). The results presented in FIG.
- HMS-151 ® makes it possible to switch stoichiometry on both sides.
- increasing the Si-H / Si-vinyl ratio causes a decrease of up to a factor of 3 in the freezing time.
- the conservation module G ' increases very significantly since it is multiplied by 125 when this ratio increases from 0.31 to 1.17. This increase in the storage modulus is accompanied by a loss of tackiness of the material.
- HMS-151 ® provides the missing hydrogen silane functions to react with the excess vinyl functions in the GEL 8250 ® prepared in equimassic proportions. This results in an increase in the number of crosslinking nodes, and therefore in the crosslinking density, and therefore in the storage modulus.
- the resistance to temperature was compared by comparing the TGA profiles of the gel
- polysiloxanes containing functional Si-H functions makes it possible to improve various properties of the polyorganosiloxane gels. These polysiloxanes containing Si-H functions do not change the good high temperature withstand properties of these polymers.
- This technique is adaptable to all crosslinkable polyorganosiloxanes by hydrosilylation.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Silicon Polymers (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1461594A FR3029205B1 (fr) | 2014-11-27 | 2014-11-27 | Encapsulation de composants electroniques dans des materiaux polymeres |
| PCT/EP2015/077056 WO2016083224A1 (fr) | 2014-11-27 | 2015-11-19 | Encapsulation de composants electroniques dans des materiaux polymeres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3224320A1 true EP3224320A1 (fr) | 2017-10-04 |
Family
ID=52423940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15798036.8A Withdrawn EP3224320A1 (fr) | 2014-11-27 | 2015-11-19 | Encapsulation de composants electroniques dans des materiaux polymeres |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10242925B2 (fr) |
| EP (1) | EP3224320A1 (fr) |
| CN (1) | CN107109062B (fr) |
| FR (1) | FR3029205B1 (fr) |
| WO (1) | WO2016083224A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102824159B1 (ko) * | 2019-07-15 | 2025-06-25 | 노비니움, 엘엘씨 | 장기간 전력용 케이블 성능을 연장하기 위한 실란 기능 안정제 |
| WO2021087452A1 (fr) * | 2019-10-31 | 2021-05-06 | President And Fellows Of Harvard College | Encapsulation par infusion de fluides de matériaux sensibles à l'eau ayant un caractère hydrofuge à échelle multiple et renouvelable |
| CN114848922B (zh) * | 2022-04-19 | 2023-01-10 | 浙江大学 | 一种掺杂力致发光材料的复合导管材料及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247492A2 (fr) * | 1986-05-21 | 1987-12-02 | AT&T Corp. | Objets encapsulés en silicone |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4114037B2 (ja) | 2001-09-25 | 2008-07-09 | 信越化学工業株式会社 | 電気・電子部品の硫化防止又は遅延用シリコーンゴム封止・シール材及び硫化防止又は遅延方法 |
| WO2010010841A1 (fr) | 2008-07-22 | 2010-01-28 | 電気化学工業株式会社 | Composition de résine |
| CN102341459B (zh) | 2009-03-12 | 2014-01-01 | 道康宁公司 | 热界面材料和它们的制备与使用方法 |
| CN101608068B (zh) * | 2009-07-10 | 2011-09-07 | 茂名市信翼化工有限公司 | 一种功率型led封装用的有机硅材料及其合成方法 |
| KR101265913B1 (ko) | 2010-06-08 | 2013-05-20 | 세키스이가가쿠 고교가부시키가이샤 | 광 반도체 장치용 다이본드재 및 이를 이용한 광 반도체 장치 |
| JP5522111B2 (ja) * | 2011-04-08 | 2014-06-18 | 信越化学工業株式会社 | シリコーン樹脂組成物及び当該組成物を使用した光半導体装置 |
| JP5794836B2 (ja) * | 2011-06-02 | 2015-10-14 | 日東電工株式会社 | シリコーン樹脂組成物、シリコーン樹脂シート、光半導体素子装置、および、シリコーン樹脂シートの製造方法。 |
| JP2013095809A (ja) * | 2011-10-31 | 2013-05-20 | Nitto Denko Corp | シリコーン樹脂組成物、シリコーン樹脂シート、光半導体素子装置、および、シリコーン樹脂シートの製造方法。 |
| CN104619780B (zh) * | 2012-09-14 | 2017-07-07 | 横滨橡胶株式会社 | 固化性树脂组合物 |
| JP5819866B2 (ja) * | 2013-01-10 | 2015-11-24 | 信越化学工業株式会社 | 付加硬化型シリコーン組成物、光学素子封止材および光学素子 |
| CN103045159B (zh) * | 2013-01-31 | 2014-07-30 | 株洲时代新材料科技股份有限公司 | 一种大功率igbt封装用双组份有机硅凝胶及其制备方法 |
| JP5843368B2 (ja) * | 2013-05-07 | 2016-01-13 | 信越化学工業株式会社 | 熱伝導性シリコーン組成物及びその硬化物 |
| EP3133105B1 (fr) * | 2015-07-31 | 2020-12-09 | Shin-Etsu Chemical Co., Ltd. | Organopolysiloxane contenant de l'hydrosilyl, son procédé de fabrication, composition de silicone durcissable par addition et boîtier de semi-conducteur |
-
2014
- 2014-11-27 FR FR1461594A patent/FR3029205B1/fr active Active
-
2015
- 2015-11-19 EP EP15798036.8A patent/EP3224320A1/fr not_active Withdrawn
- 2015-11-19 US US15/527,944 patent/US10242925B2/en active Active
- 2015-11-19 CN CN201580064529.2A patent/CN107109062B/zh active Active
- 2015-11-19 WO PCT/EP2015/077056 patent/WO2016083224A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247492A2 (fr) * | 1986-05-21 | 1987-12-02 | AT&T Corp. | Objets encapsulés en silicone |
Non-Patent Citations (2)
| Title |
|---|
| "Silicones", 15 April 2003, ENCYCLOPEDIA OF POLYMER SCIENCE AND TECHNOLOGY, WILEY, US, PAGE(S) 765 - 841, XP007918236 * |
| See also references of WO2016083224A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20180312640A1 (en) | 2018-11-01 |
| WO2016083224A1 (fr) | 2016-06-02 |
| CN107109062B (zh) | 2021-09-07 |
| CN107109062A (zh) | 2017-08-29 |
| FR3029205A1 (fr) | 2016-06-03 |
| FR3029205B1 (fr) | 2018-05-25 |
| US10242925B2 (en) | 2019-03-26 |
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