EP0387450A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for making an IC Socket
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1989-12-19
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Granted: —
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Expires: 2009-12-19
Abstract
Abstract IC sockets for use in a burn-in test are disclosed. The IC sockets are produced by injection molding of a specific polyimide having an inherent viscosity of 0.35 to 0.65 dl/g and essentially consisting of recurring units represented by the formula (I): <CHEM> wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon having from 1 to 10 carbon atoms, hexafluorinated isopropylidene etc. and R is a tetravalent radical selected from the group consisting of an aliphatic radical having two or more carbon atoms, cycloaliphatic radical, monoaromatic radical etc.
Inventors
- 👤 Toshihiko Tsutsumi
- 👤 Taizo Nagahiro
- 👤 Toshiyuki Nakakura
- 👤 Shuithi Morikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/2851; G01R31/2855; G01R31/286; G01R31/2863; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; C08G73/1057; C08G73/1064; C08G73/1067; C08G73/1071; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01R; H01R43/00; H01R43/20; H01R43/24; H10; H10P; H10P72/00; H10P72/70; H10P72/74
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
An IC socket comprising a polyimide consisting essentially of recurring units represented by the formula (I): wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon having from 1 to 10 carbon atoms, hexafluorinated isopropylidene, carbonyl, thio, or sulfonyl, and R is a tetravalent radical selected from the group consisting of an aliphatic radical having two or more carbon atoms, cycloaliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function.
Claim 2
Dependent Claim
90 words
An IC socket comprising a polyimide consisting essentially of recurring units represented by the formula (I): wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon having from 1 to 10 carbon atoms, hexafluorinated isopropylidene, carbonyl, thio, or sulfonyl, and R is a tetravalent radical selected from the group consisting of an aliphatic radical having two or more carbon atoms, cycloaliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function.
Claim 3
Dependent Claim
19 words
The IC socket of claim 1 wherein said polyimide has an inherent viscosity of from 0.35 to 0.65 dl/g.
Claim 4
Dependent Claim
19 words
The IC socket of claim 1 wherein said polyimide has an inherent viscosity of from 0.40 to 0.60 dl/g.
Claim 5
Dependent Claim
82 words
The IC socket of claim 1 wherein said polyimide is obtained by reacting an etherdiamine represented by the formula (II): wherein X is the same as above as defined in claim 1, with one or more of tetracarboxylic acid dianhydride represented by the formula (III): wherein R is the same as above as defined in claim 1, and said etherdiamine is a compound or a mixture thereof selected from the group consisting of 4,4′-bis[4-(3-aminophenoxy)phenyl] sulfide, 4,4′-bis[4-(3-aminophenoxy)phenyl] sulfone, 4,4′-bis(3-aminophenoxy)benzophenone, 4,4′-bis(3-aminophenoxy)biphenyl, 2,2-bis[4-(3-aminophenoxy)phenyl]propane and 2,2-bis[4-(3-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane.
Claim 6
Dependent Claim
35 words
The IC socket of claim 4 wherein said tetracarboxylic acid dianhydride is a compound or a mixture thereof selected from the group consisting of pyromellitic dianhydride, 3,3′,4,4′-biphenyltetracarboxylic dianhydride, 3,3′,4,4′-benzophenonetetracarboxylic dianhydride, 3,3′,4,4′-diphenylethertetracarboxylic dianhydride and p-phenyleneoxydi(4-phthalic) dianhydride.
Claim 7
Dependent Claim
33 words
The IC socket of claim 1 wherein amount of glass fiber added to said polyimide is 40% by weight or less per weight of a composition containing said polyimide and the glass fiber.
Claim 8
Dependent Claim
28 words
The IC socket of claim 6 wherein the composition contains a colorant, filler excluding the glass fiber, extender, stabilizer and a lubricant in addition to said glass fiber.
Claim 9
Dependent Claim
38 words
The IC socket of claim 1 wherein powder or pellet of said polyimide is fused,kneaded and pelletized in the presence or absence of glass fiber and/or other auxiliary agents, and the resulting pellet is subjected to injection molding.
Claim 10
Dependent Claim
39 words
The IC socket of claim 8 wherein said injection molding is carried out at a cylinder temperature of from 300 to 450°C, mold temperature of from 150 to 230°C, and the injection pressure of from 500 to 1500 kg/cm².
References Cited (Backward Citations)
No citation records indexed.
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