US6057381A
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US
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Method of making an electronic component using reworkable underfill encapsulants
Assignee: Henkel IP and Holding GmbH
•
Filing: 1998-07-02
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Granted: 2000-05-02
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Expires: 2018-07-02
Abstract
Abstract A method is disclosed for preparing an electronic assembly using a reworkable underfill encapsulant in which the encapsulant is cured in situ from a curable composition comprising one or more mono-functional maleimide compounds, or one or more mono-functional vinyl compounds other than maleimide compounds, or a combination of maleimide and vinyl compounds, a curing initiator and optionally, one or more fillers or adhesion promoters.
Inventors
- 👤 Bodan Ma
- 👤 Quinn K. Tong
- 👤 Chaodong Xiao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/285; C08G18/2875; H; H10; H10W; H10W95/00; C08F; C08F283/00; C08F283/006; C08F283/12; C08F290/00; C08F290/08; C08F290/14; C08F290/147; C08F290/148; C08F299/00; C08F299/02; H10W72/00; H10W72/071; H10W72/30; H10W74/00; H10W74/01; H10W74/012; H10W74/10; H10W74/15; H10W74/40; H10W74/47; H10W72/851; H10W72/853; H10W72/856; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49146; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
99 words
A method for making an electronic assembly, the electronic assembly comprising an electronic component connected to a substrate, and a cured reworkable thermoplastic composition disposed between the electronic component and the substrate, the method comprising; (a) providing a curable composition comprising (i) one or more mono-functional maleimide compounds, or a combination of mono-function maleimide compounds and mono-functional vinyl compounds; (ii) a curing initiator selected from the group consisting of a free-radical initiator, a photoinitiator, and a combination of those; (b) disposing the curable composition between the electronic component and the substrate; and (c) curing the curable composition in situ.
Claim 2
Independent Claim
99 words
A method for making an electronic assembly, the electronic assembly comprising an electronic component connected to a substrate, and a cured reworkable thermoplastic composition disposed between the electronic component and the substrate, the method comprising; (a) providing a curable composition comprising (i) one or more mono-functional maleimide compounds, or a combination of mono-function maleimide compounds and mono-functional vinyl compounds; (ii) a curing initiator selected from the group consisting of a free-radical initiator, a photoinitiator, and a combination of those; (b) disposing the curable composition between the electronic component and the substrate; and (c) curing the curable composition in situ.
Claim 3
Dependent Claim
300 words
The method according to claim 1 in which the maleimide compound has the formula ##STR20## in which (a) R 1 is H or an alkyl group having 1 to 5 carbon atoms; (b) Ar is an aromatic group selected from the aromatic groups having the structures: ##STR21## (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 Ar; or Q is a urethane having the structure: ##STR22## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Q is an ester having the structure: ##STR23## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or Q is a siloxane having the structure: --(CR 1 2 ) e -(SiR 4 2 --O) f --SiR 4 2 --(CR 1 2 ) g -- in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10 and f is 1 to 50.
Claim 4
Dependent Claim
12 words
The method according to claim 2 in which Q is the urethane.
Claim 5
Dependent Claim
209 words
The method according to claim 1 in which the maleimide compound has the formula: ##STR24## in which (a) R 1 is H or an alkyl group having 1 to 5 carbon atoms; (b) Ar is an aromatic group selected from the aromatic groups having the structures: ##STR25## (c) Q is a linear or branched chain alkyl amine, alkyl sulfide, 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 Ar; or Q is a urethane having the structure: ##STR26## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms: R 3 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 Q is an ester having the structure: ##STR27## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents.
Claim 6
Dependent Claim
12 words
The method according to claim 4 in which 0 is the urethane.
Claim 7
Dependent Claim
12 words
The method according to claim 4 in which Q is the ester.
Claim 8
Dependent Claim
128 words
The method according to claim 1 in which the maleimide compound has the formula: ##STR28## Q is a linear or branched chain alkyl amine, alkyl sulfide, 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; or Q is a urethane having the structure: ##STR29## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 1 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.
Claim 9
Dependent Claim
12 words
The method according to claim 7 in which Q is the urethane.
Claim 10
Dependent Claim
471 words
The method according to claim 1 in which the maleimide compound has the formula ##STR30## in which (a) R 1 is H or an alkyl having 1 to 5 carbon atoms; (b) Z is a linear or branched chain alkyl amine, alkyl sulfide, 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 Ar; or Z is a urethane having the structure: ##STR31## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Z is a siloxane having the structure: --(CR 1 2 ) e --[SiR 4 2 O] f --SiR 4 2 --(CR 1 2 ) g -- in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10, and f is 1 to 50; or Z is an ester having the structure: ##STR32## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chains which chain may contain aryl substituents; (c) Ar is an aromatic group selected from group of aromatic groups having the structures: ##STR33## in which p is 1 to 100; R 5 , R 6 , and R 7 are 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 backbone in the chain, and in which any heteroartom present may or may not be directly attached to the aromatic ring; or R 5 , R 6 and R 7 are a siloxane having the structure (CR 1 2 ) e --[SiR 4 2 --O] f --R 4 2 --(CH 3 ) g -- in which the R 1 substituent is H or an alkyl group having 1 to 5 carbon atoms and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e is 1 to 10 and f is 0 to 50.
Claim 11
Dependent Claim
12 words
The method according to claim 9 in which Z is the urethane.
Claim 12
Dependent Claim
12 words
The method according to claim 9 in which Z is the siloxane.
Claim 13
Dependent Claim
12 words
The method according to claim 9 in which Z is the ester.
Claim 14
Independent Claim
16 words
The method according to any one of claims 9 to 12 in which Ar is ##STR34##
Claim 15
Dependent Claim
221 words
The method according to claim 1 in which the maleimide compound has the formula in which (a) R 1 is H or an alkyl having 1 to 5 carbon atoms; (b) Ar is an aromatic group selected from group of aromatic groups having the structures; ##STR35## in which p is to 100; R 5 , R 6 , and R 7 are 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 backbone in the chain, and in which any heteroatom present may or may not be directly attached to the aromatic ring; or R 5 , R 6 , and R 7 are a siloxane having the structure --(CR 1 2 ) e --[SiR 4 2 --O] f --R 4 2 --(CH 3 ) g -- in which the R 1 substituent is H or an alkyl group having 1 to 5 carbon atoms and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e is 1 to 10 and f is 0 to 50.
Claim 16
Dependent Claim
11 words
The method according to claim 14 in which Ar is ##STR36##
Claim 17
Dependent Claim
345 words
The method according to claim 1 in which the vinyl compound has the formula in which (a) R 1 and R 2 are H or an alkyl group having 1 to 6 carbon atoms, or together form a 5 to 9 membered ring with the carbons forming the vinyl group; (b) B is C, S, N, O, C(O), O--C(O), C(O)--O, C(O)NH or C(O)N(R 8 ), in which R 8 is an alkyl group having 1 to 5 carbon atoms; (c) each Ar is an aromatic group selected from the group of aromatic groups having the structures: ##STR37## (d) Q is a linear or branched chain alkyl amino, alkyl sulfide, 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 Ar; or Q is a urethane having the structure: ##STR38## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Q is an ester having the structure: ##STR39## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or Q is a siloxane having the structure: --(CR 1 2 ) e --(SiR 4 2 --O) f --SiR 4 2 (CR 1 2 ) g --in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10 and f is 1 to 50.
Claim 18
Dependent Claim
12 words
The method according to claim 16 in which Q is the urethane.
Claim 19
Dependent Claim
12 words
The method according to claim 16 in which Q is the ester.
Claim 20
Dependent Claim
12 words
The method according to claim 16 in which Q is the siloxane.
Claim 21
Dependent Claim
344 words
The method according to claim 1 in which the vinyl compound has the formula ##STR40## in which (a) R 1 and R 2 are H or an alkyl group having 1 to 5 carbon atoms, or together form a 5 to 9 membered ring with the carbons forming the vinyl group; (b) B is C, S, N, C(O)NH or C(O)N(R 8 ), in which R 8 is an alkyl group having 1 to 5 carbon atoms; (c) Ar is an aromatic group selected from the aromatic groups having the structures: ##STR41## (d) 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 Ar; or Q is a urethane having the structure: ##STR42## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Q is an ester having the structure: ##STR43## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or Q is a siloxane having the structure: --(CR 1 2 ) e --(SiR 4 2 --O) f --SiR 4 2 --(CR 1 2 ) g -- in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10 and f is 1 to 50.
Claim 22
Dependent Claim
12 words
The method according to claim 20 in which Q is the urethane.
Claim 23
Dependent Claim
12 words
The method according to claim 20 in which Q is the ester.
Claim 24
Dependent Claim
12 words
The method according to claim 20 in which Q is the siloxane.
Claim 25
Dependent Claim
348 words
The method according to claim 1 in which the vinyl compound has the formula ##STR44## in which (a) R 1 and R 2 are H or an alkyl group having 1 to 5 carbon atoms, or together form a 5 to 9 membered ring with the carbons forming the vinyl group; (b) B is C, S, N, O, C(O), O--C(O), C(O)--O, C(O)NH or C(O)N(R 8 ), in which R 8 is an alkyl group having 1 to 5 carbon atoms; (c) Ar is an aromatic group selected from the aromatic groups having the structures: ##STR45## (d) Q is a linear or branched chain alkyl, alkyloxy, alkyl amine, alkyl sulfide, alkylene, alkylene oxide, 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 Ar; or Q is a urethane having the structure: ##STR46## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Q is an ester having the structure: ##STR47## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or Q is a siloxane having the structure:--(CR 1 2 ) e --(SiR 4 2 --O) f --SiR 4 2 --(CR 1 2 ) g -- in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10 and f is 1 to 50.
Claim 26
Dependent Claim
12 words
The method according to claim 24 in which Q is the urethane.
Claim 27
Dependent Claim
12 words
The method according to claim 24 in which Q is the ester.
Claim 28
Dependent Claim
12 words
The method according to claim 24 in which Q is the siloxane.
Claim 29
Dependent Claim
143 words
The method according to claim 1 in which the vinyl compound has the formula ##STR48## in which (a) R 1 and R 2 are H or an alkyl group having 1 to 5 carbon atoms, or together form a 5 to 9 membered ring with the carbons forming the vinyl group; (b) B is C, S, N, O, C(O), O--C(O), C(O)--O, C(O)NH or C(O)N(R 8 ), in which R 8 is an alkyl group having 1 to 5 carbon atoms; (c) Q is a urethane having the structure: ##STR49## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chair may contain aryl substituents; X is O, S, N, or P, and v is 0 to 50.
Claim 30
Dependent Claim
328 words
The method according to claim 1 in which the vinyl compound has the formula ##STR50## in which (a) R 1 and R 2 are H or an alkyl group having 1 to 5 carbon atoms, or together form a 5 to 9 membered ring with the carbons forming the vinyl group; (b) B is C, S, N, C(O)NH or C(O)N(R 8 ), in which R 8 is an alkyl group having 1 to 5 carbon atoms; (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 Ar; or Q is a urethane having the structure: ##STR51## in which each R 2 independently is an alkyl, aryl, or arylalkyl group having 1 to 18 carbon atoms; R 3 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 Q is an ester having the structure: ##STR52## in which R 3 is an alkyl or alkyloxy chain having up to 100 atoms in the chain, which chain may contain aryl substituents; or Q is a siloxane having the structure: --(CR 1 2 ) e --(SiR 4 2 --O) f --SiR 4 2 --(CR 1 2 ) g --in which the R 1 substituent independently for each position is H or an alkyl group having 1 to 5 carbon atoms, and the R 4 substituent independently for each position is an alkyl group having 1 to 5 carbon atoms or an aryl group, and e and g are independently 1 to 10 and f is 1 to 50.
Claim 31
Dependent Claim
12 words
The method according to claim 29 in which Q is the urethane.
Claim 32
Dependent Claim
12 words
The method according to claim 29 in which Q is the ester.
Claim 33
Dependent Claim
12 words
The method according to claim 29 in which Q is the siloxane.
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