B-stageable die attach adhesives
First Claim
Patent Images
1. A b-stage curable composition comprising:
- a. a solid component heat curable at a first temperature;
b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and
c. a heat cure catalyst for the solid curable component, wherein the liquid curable component comprises epoxies, episuldides, maleimides, nadimides, itaconimides, (meth)acrylate, vinyl ethers, vinyl esters, styrene and derivatives thereof, poly(alkenylene)s, allyl amides, norbornenyls, thiolenes, and combinations thereof.
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Accused Products
Abstract
The present invention relates to b-stageable die attach adhesives, methods of preparing such adhesives, methods of applying such adhesives to the die and other substrate surfaces, and assemblies prepared therewith for connecting microelectronic circuitry.
95 Citations
35 Claims
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1. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the liquid curable component comprises epoxies, episuldides, maleimides, nadimides, itaconimides, (meth)acrylate, vinyl ethers, vinyl esters, styrene and derivatives thereof, poly(alkenylene)s, allyl amides, norbornenyls, thiolenes, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 32, 33, 34, 35)
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15. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the heat cure catalyst is selected from the group consisting of free radical catalysts, anionic curatives, cationic curatives, and combinations thereof, wherein the tree radical catalyst is a member selected from the group consisting of peroxides, azo compounds, and combinations thereof. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, whicn is either heat curable at a second temperature or curable up on exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the cationic curative is a member selected from the group consisting of organic acids, anhydrides, Lewis acids, and combinations thereof, wherein the heat cure catalyst. is selected from the group consisting of free radical catalysts, anionic curatives, cationic curatives, and combinations thereof. - View Dependent Claims (22)
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23. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, whicn is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, further comprising a second heat cure catalyst for the liquid curable component. - View Dependent Claims (24, 25)
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26. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the solid curable component comprises one or more of a group of epoxies, episulfides, maleimides, nadimides, itaconinides, (meth)acrylate, vinyl ethers, vinyl esters, styrene and derivatives thereof, poly(alkenylene)s, allyl amides, norbornenyls, thiolenes, and combinataons thereof.
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27. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable up on exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the liquid curable component is a member selected from the group consisting of a maleimide-containing compound, a nadimide-containing compound or a itaconimide-contaning compound comprising
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28. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. A liquid componet, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the liquid curable component is a member selected from the group consisting of a maleimide-containing compound, a nadimide-contaning compound or a itaconimide-containing compound comprising structures I, II and III, wherein m=1–
6,p=0, R2 is independently selected from hydrogen or lower alkyl, and J is a monovalent or polyvalent radical selected from hydrocarbyl, substituted hydrocarbyl, heteroatom-containing hydrocarbyl, substituted heteroatom-containing hydrocarbyl, hydrocarbylene, substituted hydrocarbylene, heteroatom-containing hydrocarbylene, substituted heteroatom-containing hydrocarbylene, polysiloxane, polysiloxane-polyurethane block copolymer, and combinations of two or more thereof, optionally containing one or more linkers selected from a covalent bond, -O-, -S-, -NR-, -O-C(O)-, -O-C(O)-O-, -OC(O)-NR-, -NR-C(O)-, -NR-C(O)-O-, -NR-C(O)-NR-, -S-c(O)-, -S-C(O)-O-, -S-C(O)-NR-, -S(O)-, -S(O)2-, -O-S(O)2-, -O-S(O)2-O-, -OS(O)2-NR-, -O-S(O)-, -O-S(O)-O-, -O-S(O)-NR-, -O-NR-C(O)-, -O-NR-C(O)-O-, -O-NR-C(O)-NR-, -NR-O-C(O)-, -NR-O-C(O)-O-, -NR-O-C(O)-NR-, -NR-O-C(S)-O_, -NR-O-C(S)-NR-, -O-(S)-, -O-C(S)-O-, -O-C(S)-NR-, -NR-C(S)-, -NR-C(S)-O-, -NR-C(S)-NR-, -S-S(O)2-, -S-S(O)2-O-, -S-S(O02-NR-, -NR-O-S(O)-, -NR-O-S(O)-O-, -NR-O-S(O)-NR-O-S(O)2-, -NR-O-S(O)2-O-, -NR-O-S(O)2NR-, -O-NR-S(O)-, -O-NR-S(O)-O-, -O-NR-S(O)-NR-, -O_NR-S(O)2-O-, -O-NR-S(O)2-NR-, -O-NR-S(O)2-, -O-P(O)R2-, -S-P(O)R2-, -NR-P(O)R2-, wherein each R is independently hydrogen, alkyl or substituted alkyl, and combinations of any two or more thereof.
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29. A b-stage curable composition comprising:
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable componet, wherein the solid curable component is a maleimide-containing compound, a nadimide-containing compound or a itaconimide-contaning compound in the solid state at room temperature. - View Dependent Claims (30)
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31. A b-stage curable composition comprising;
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a. a solid component heat curable at a first temperature; b. a liquid component, which is either heat curable at a second temperature or curable upon exposure to radiation in the electromagnetic spectrum; and c. a heat cure catalyst for the solid curable component, wherein the liquid component comprises one or more of the maleimide-containing compound, the nadimide-containing compound or the itaconimide-containing compound comprises a maleimide functional group, nadimide functional group or itaconimide functional group respectiveley, attached to a monovalent radical or maleimide functional groups, nadimide functional groups or itaconimide functional groups separated by a polyvalent radical, each of the monovalent radical or the polyvalent radical having sufficient length and branching to render the maleimide-containing compound, the nadimide-containing compound or the itaconimide-containing compound respectively, a liquid.
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Specification