Composition for curable resin, cured product of said composition, production method for said composition and said cured product, and semiconductor device

1. A curable resin composition containing:

(A) a multifunctional benzoxazine compound having at least two benzoxazine rings, the compound being at least one multifunctional benzoxazine compound selected from a multifunctional benzoxazine compound having a structural unit of formula (1) and a multifunctional benzoxazine compound represented by a structure of formula (2),

(B) an epoxy compound having at least one norbornane structure and at least two epoxy groups, wherein the epoxy compound (B) has at least one moiety selected from

(C) a biphenyl epoxy compound, and

(D) a curing agent;

wherein formula (1) is

wherein in the formula (1), R represents a linear alkyl group having 1 to 12 carbon atoms, a cyclic alkyl group having 3 to 8 carbon atoms, or an aryl group having 6 to 14 carbon atoms, where the aryl group optionally has halogen or a linear alkyl group having 1 to 12 carbon atoms, as a substituent; and each Z represents hydrogen, a hydrocarbon group having 1 to 8 carbon atoms and/or a linking group and is optionally the same or different, at least one Z represents a linking group, and benzoxazine rings are linked by the linking group; and

formula (2) is

wherein in the formula (2), L represents a divalent organic group having 1 to 5 aromatic rings or an alkylene group having 2 to 10 carbon atoms, and the organic group and the alkylene group optionally comprise oxygen and/or sulfur.

2. The curable resin composition according to claim 1 , wherein (C) the biphenyl epoxy compound is an epoxy compound represented by a structure of formula (3-1) or (3-2):

wherein in the formula (3-1), each substituent R a represents an alkyl group having 1 to 4 carbon atoms, optionally being the same or different; m represents the number of the substituent(s) R a and is an integer of 0 to 4; and n represents an average value and is 1 to 10;

wherein in the formula (3-2), R 1 to R 8 represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms, and are each optionally the same or different.

3. The curable resin composition according to claim 2 , further containing (E) an inorganic filler.

4. The curable resin composition according to claim 2 , further containing (F) a curing accelerator.

5. A cured product obtained by curing the curable resin composition according to claim 2 .

6. A semiconductor device, wherein a semiconductor element is disposed in a cured product obtained by curing the curable resin composition according to claim 2 .

7. The curable resin composition according to claim 1 , further containing (E) an inorganic filler.

8. The curable resin composition according to claim 7 , further containing (F) a curing accelerator.

9. A cured product obtained by curing the curable resin composition according to claim 7 .

10. A semiconductor device, wherein a semiconductor element is disposed in a cured product obtained by curing the curable resin composition according to claim 7 .

11. The curable resin composition according to claim 1 , further containing (F) a curing accelerator.

12. A cured product obtained by curing the curable resin composition according to claim 11 .

13. A semiconductor device, wherein a semiconductor element is disposed in a cured product obtained by curing the curable resin composition according to claim 11 .

14. A cured product obtained by curing the curable resin composition according to claim 1 .

15. A semiconductor device, wherein a semiconductor element is disposed in a cured product obtained by curing the curable resin composition according to claim 1 .

16. A method of producing a curable resin composition, the method comprising the steps of:

mixing

(A) a multifunctional benzoxazine compound having at least two benzoxazine rings, the compound being at least one multifunctional benzoxazine compound selected from a multifunctional benzoxazine compound having a structural unit of formula (1) and a multifunctional benzoxazine compound represented by a structure of formula (2),

(B) an epoxy compound having at least one norbornane structure and at least two epoxy groups, wherein the epoxy compound (B) has at least one moiety selected from

(C) a biphenyl epoxy compound, and

(D) a curing agent,

to obtain a mixture; and

processing the mixture into a powdery, pelletized, or granular curable resin composition;

wherein formula (1) is

wherein in the formula (1), R represents a linear alkyl group having 1 to 12 carbon atoms, a cyclic alkyl group having 3 to 8 carbon atoms, or an aryl group having 6 to 14 carbon atoms, where the aryl group optionally has halogen or a linear alkyl group having 1 to 12 carbon atoms, as a substituent; and each Z represents hydrogen, a hydrocarbon group having 1 to 8 carbon atoms and/or a linking group and is optionally the same or different, at least one Z represents a linking group, and benzoxazine rings are linked by the linking group; and

wherein formula (2) is

wherein in the formula (2), L represents a divalent organic group having 1 to 5 aromatic rings or an alkylene group having 2 to 10 carbon atoms, and the organic group and the alkylene group optionally comprise oxygen and/or sulfur.

17. The production method according to claim 16 , wherein (C) the biphenyl epoxy compound is an epoxy compound represented by formula (3-1) or (3-2):

wherein in the formula (3-1), each substituent R a represents an alkyl group having 1 to 4 carbon atoms, optionally being the same or different; m represents the number of the substituent(s) R a and is an integer of 0 to 4; and n represents an average value and is 1 to 10;

wherein in the formula (3-2), R 1 to R 8 represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms, and are each optionally the same or different.

18. The production method according to claim 17 , wherein the step of obtaining a mixture comprises further mixing (E) an inorganic filler and/or (F) a curing accelerator to obtain a mixture.

19. The production method according to claim 16 , wherein the step of obtaining a mixture comprises further mixing (E) an inorganic filler and/or (F) a curing accelerator to obtain a mixture.

20. A method of producing a cured product, the method comprising a step of heating the curable resin composition produced by the method according to claim 16 , at 150 to 300° C. for 20 seconds to 1 hour for curing.