Patent TW-499439-B (TW)
Title: Underfill encapsulants prepared from allylated amide compounds
Inventor: SCHULTZ ROSE ANN
IPC: H01L23/29
Filed: 1999-07-01
Granted: 2002-08-21
Abstract: Underfill encapsulants are prepared from allylated amide compounds and a curing initiator. An underfill encapsulant comprising an allylated amide compound; a curing initiator selected from the group consisting of a free-radical initiator, a photoinitiator, and a combination of those; optionally, one or more fillers; optionally, one or more adhesion promoters; the allylated amide compound having the formula in which m is 0 or 1, n is 1 to 6, and (a) R9 is H, an alkyl group having 1 to 18 carbon atoms, an alkyleneoxy group having 1 to 18 carbon atoms, an allyl group, an aryl group, or a substituted aryl group having the structure in which R10, R11, and R12 are independently H or an alkyl or alkyleneoxy group having 1 to 18 carbon atoms; (b) X is an aromatic group selected from the group of aromatic groups having the structures: (c) Q is a linear or branched chain alkyl, alkyloxy, alkyl amine, alkyl sulfide, alkylene, alkyleneoxy, alkylene amine, alkylene sulfide, aryl, aryloxy, or aryl sulfide species having up to about 100 atoms in the chain, which may contain saturated or unsaturated cyclic or heterocyclic substituents pendant from the chain or as part of the chain, and in which any heteroatom present may or may not be directly attached to X; or (d) Q is a urethane having the structure: in which each R2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; X is O, S, N, or P; and v is 0 to 50; or (e) Q is a siloxane having the structure (CR<SP>1</SP>2)e-[SiR<SP>4</SP>2-O]f-SiR<SP>4</SP>2-(CR<SP>1</SP>2)g- in which the R1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, the R4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, e and g are independently 1 to 10, and f is 1 to 50; (f) Q is an ester having the structure: in which R is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or (g) Q is an ester having the structure: in which p is 1 to 100, each R3 can independently be an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents, or a siloxane having the structure -(CR<SP>1</SP>2)e-[SiR<SP>4</SP>2-O]f-SiR<SP>4</SP>2-(CR<SP>1</SP>2)g- in which the R1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, the R4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, e and g are independently 1 to 10, and f is 1 to 50; or (h) Q is an ester having the structure: in which p is 1 to 100, each R3 can independently be an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents, or a siloxane having the structure -(CR<SP>1</SP>2)e-[SiR<SP>4</SP>2-O]f-SiR<SP>4</SP>2-(CR<SP>1</SP>2)g- in which the R1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, the R4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, e and g are independently 1 to 10, and f is 1 to 50.