US4330637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated electronic devices and encapsulating compositions
Assignee: AT&T Inc
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Filing: 1981-01-05
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Granted: 1982-05-18
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Expires: 2001-01-05
Abstract
Abstract An electronic device such as an integrated circuit is encapsulated within a silicone resin formulation having a metallo-porphyrin compound contained therein. The compound is cleaved by HCl to form a porphyrin diacid chloride and a free metal having the capability of chelating chloride ions and hydroxyl groups thereby preventing corrosion and anionic attack of metallic circuit elements and development of unwanted conductive pathways.
Inventors
- 👤 Ching-Ping Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/0091
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
25 words
A method of sequestering HCl and chelating anions on an electronic device which comprises applying to the device an encapsulant containing therein a metallo-porphyrin compound.
Claim 2
Independent Claim
25 words
A method of sequestering HCl and chelating anions on an electronic device which comprises applying to the device an encapsulant containing therein a metallo-porphyrin compound.
Claim 3
Dependent Claim
13 words
The method as recited in claim 1 wherein the anions include a halogen.
Claim 4
Dependent Claim
14 words
The method as recited in claim 2 wherein the halogen is a chloride ion.
Claim 5
Dependent Claim
20 words
The method as recited in claim 1 wherein the metal is selected from the group consisting of the lanthanide series.
Claim 6
Dependent Claim
16 words
The method as recited in claim 1 wherein the metal is complexed with a β-diketone ligand.
Claim 7
Dependent Claim
16 words
The method as recited in claim 5 wherein the β-diketone is acetyl acetone and derivatives thereof.
Claim 8
Dependent Claim
49 words
The method as recited in claim 1 wherein the porphyrin ligand of the metallo-porphyrin compound has the structural formula: ##STR3## wherein R 1 , R 2 , R 3 and R 4 is a 1 to 7 carbon alkyl, a phenyl, a p-methyphenyl, a fluorophenyl or any derivative thereof.
Claim 9
Dependent Claim
15 words
The method as recited in claim 1 wherein the metallo-porphyrin compound is a lanthanide tetraphenylporphyrin.
Claim 10
Dependent Claim
36 words
The method as recited in claim 1 wherein the metallo-porphyrin is added to the encapsulant in at least a 2:1 stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 11
Dependent Claim
14 words
The method as recited in claim 1 wherein the encapsulant is a polymeric composition.
Claim 12
Dependent Claim
15 words
The method as recited in claim 10 wherein the polymeric composition is a polymeric silicone.
Claim 13
Dependent Claim
19 words
An article of manufacture comprising an electronic device and an encapsulant thereover, the encapsulant containing therein a metallo-porphyrin compound.
Claim 14
Dependent Claim
19 words
An article of manufacture comprising an electronic device and an encapsulant thereover, the encapsulant containing therein a metallo-porphyrin compound.
Claim 15
Dependent Claim
22 words
The article of manufacture as recited in claim 12 wherein the metal of the metallo-porphyrin is a member of the lanthanide series.
Claim 16
Dependent Claim
21 words
The article of manufacture as recited in claim 12 wherein the metal of the metallo-porphyrin is also complexed as a β-diketonate.
Claim 17
Dependent Claim
17 words
The article of manufacture as recited in claim 14 wherein the β-diketonate is acetylacetonate and derivatives thereof.
Claim 18
Dependent Claim
51 words
The article of manufacture as recited in claim 12 wherein the porphyrin of the metallo-porphyrin compound has the structural formula: ##STR4## wherein R 1 , R 2 , R 3 and R 4 is a 1 to 7 carbon alkyl, a phenyl , a p-methylphenyl, a fluorophenyl or any derivative thereof.
Claim 19
Dependent Claim
17 words
The article of manufacture as recited in claim 15 wherein the metallo-porphyrin compound is a lanthanide tetraphenylporphyrin.
Claim 20
Dependent Claim
39 words
The article of manufacture as recited in claim 14 wherein the metallo-porphyrin compound is present in the encapsulant in at least a 2:1 stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 21
Dependent Claim
16 words
The article of manufacture as recited in claim 12 wherein the encapsulant is a polymeric composition.
Claim 22
Dependent Claim
17 words
The article of manufacture as recited in claim 19 wherein the polymeric composition is a polymeric silicone.
Claim 23
Dependent Claim
15 words
A composition of matter comprising a polymeric silicone encapsulant having dissolved therein a metallo-porphyrin compound.
Claim 24
Dependent Claim
15 words
A composition of matter comprising a polymeric silicone encapsulant having dissolved therein a metallo-porphyrin compound.
Claim 25
Dependent Claim
25 words
A composition of matter as recited in claim 21 wherein the metal of the metallo-porphyrin is selected from the group consisting of the lanthanide series.
Claim 26
Dependent Claim
16 words
The composition of matter as recited in claim 21 wherein the metallo-porphyrin is a lanthanide tetraphenylporphyrin.
Claim 27
Dependent Claim
21 words
The composition of matter as recited in claim 21 wherein the metal of the metallo-porphyrin is also complexed as a β-diketonate.
Claim 28
Dependent Claim
23 words
The composition of matter as recited in claim 24 wherein the β-diketonate is selected from the group consisting of acetylacetonate and derivatives thereof.
Claim 29
Dependent Claim
47 words
The composition of matter as recited in claim 21 wherein the porphyrin ligand has the structural formula: ##STR5## wherein R 1 , R 2 , R 3 and R 4 is a 1 to 7 carbon alkyl, a phenyl, a p-methylpenyl, a fluorophenyl, or any derivative thereof.
Claim 30
Dependent Claim
39 words
The composition of matter as recited in claim 21 wherein the metallo-porphyrin compound is added to the encapsulant in at least a 2:1 stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 31
Dependent Claim
19 words
An article of manufacture comprising an electronic device and an encapsulant thereover, the encapsulant containing therein a porphyrin compound.
Claim 32
Dependent Claim
19 words
An article of manufacture comprising an electronic device and an encapsulant thereover, the encapsulant containing therein a porphyrin compound.
Claim 33
Dependent Claim
14 words
A composition of matter comprising a polymeric silicone encapsulant having contained therein a porphyrin.
Claim 34
Dependent Claim
14 words
A composition of matter comprising a polymeric silicone encapsulant having contained therein a porphyrin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |