US4396796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated electronic devices and encapsulating compositions
Assignee: AT&T Inc
•
Filing: 1980-10-30
•
Granted: 1983-08-02
•
Expires: 2000-10-30
Abstract
Abstract An electronic device such as an integrated circuit is encapsulated within a silicone resin formulation having a protonated heterocyclic compound contained therein. The compound complexes with free anionic contaminants to form a non-migratory, non-corrosive protonated heterocyclic compound-anion complex, thereby preventing anionic attack of metallic circuit elements.
Inventors
- 👤 Ching-Ping Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:30
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
39 words
A method of immobilizing free anions on an electronic device which comprises applying to the device a room temperature vulcanizable silicone elastomer containing therein a protonated heterocyclic compound having a charge and dimension to firmly bind said free anions.
Claim 2
Independent Claim
39 words
A method of immobilizing free anions on an electronic device which comprises applying to the device a room temperature vulcanizable silicone elastomer containing therein a protonated heterocyclic compound having a charge and dimension to firmly bind said free anions.
Claim 3
Dependent Claim
14 words
The method as recited in claim 1 wherein the free 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
26 words
The method as recited in claim 1 wherein the protonated heterocyclic compound is selected from the group consisting of protonated cryptate ethers, crown ethers and cycloamines.
Claim 6
Dependent Claim
58 words
The method as recited in claim 4 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR6## wherein n is an integer from 1 to 3, n 1 is an integer from zero to 3 and R and R 1 are selected from hydrogen and an organic radical.
Claim 7
Dependent Claim
58 words
The method as recited in claim 4 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR7## wherein n is an integer from zero to 3, n 1 is an integer from 1 to 3, n 2 is an integer from zero to 3 and any derivative thereof.
Claim 8
Dependent Claim
31 words
The method as recited in claim 4 wherein the protonated heterocyclic compound is a protonated crown ether having a 12 to 24 member ring with 4 to 8 oxygen atoms therein.
Claim 9
Dependent Claim
29 words
The method as recited in claim 4 wherein the protonated heterocyclic compound is a cycloamine having a 12 to 18 member ring with 3 to 6 nitrogen atoms therein.
Claim 10
Dependent Claim
20 words
The method as recited in claim 1 wherein the heterocyclic compound is protonated by the addition of an organic acid.
Claim 11
Dependent Claim
37 words
The method as recited in claim 1 wherein the protonated heterocyclic compound is added to the encapsulant in at least a stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 12
Dependent Claim
35 words
An article of manufacture comprising an electronic device having a room temperature vulcanizable silicone elastomer encapsulant thereover, said encapsulant comprising a protonated heterocyclic compound thereon having a charge and dimension to firmly bind anionic contaminants.
Claim 13
Dependent Claim
35 words
An article of manufacture comprising an electronic device having a room temperature vulcanizable silicone elastomer encapsulant thereover, said encapsulant comprising a protonated heterocyclic compound thereon having a charge and dimension to firmly bind anionic contaminants.
Claim 14
Dependent Claim
28 words
The article of manufacture as recited in claim 11 wherein the protonated heterocyclic compound is selected from the group consisting of protonated cryptate ethers, crown ethers and cycloamines.
Claim 15
Dependent Claim
59 words
The article of manufacture as recited in claim 12 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR8## wherein n is an integer from 1 to 3, n 1 is an integer from zero to 3 and R and R 1 can be hydrogen and an organic radical.
Claim 16
Dependent Claim
60 words
The article of manufacture as recited in claim 12 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR9## wherein n is an integer from zero to 3, n 1 is an integer from 1 to 3, n 2 is an integer from zero to 3 and any derivative thereof.
Claim 17
Dependent Claim
33 words
The article of manufacture as recited in claim 12 wherein the protonated heterocyclic compound is a protonated crown ether having a 12 to 24 member ring with 4 to 8 oxygen atoms therein.
Claim 18
Dependent Claim
32 words
The article of manufacture as recited in claim 12 wherein the protonated heterocyclic compound is a protonated cycloamine having a 12 to 18 member ring with 3 to 6 nitrogen atoms therein.
Claim 19
Dependent Claim
22 words
The article of manufacture as recited in claim 11 wherein the heterocyclic compound is protonated by the addition of an organic acid.
Claim 20
Dependent Claim
39 words
The article of manufacture as recited in claim 11 wherein the protonated heterocyclic compound is present in the encapsulant in at least a stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 21
Dependent Claim
29 words
A composition of matter comprising a room temperature vulcanizable silicone elastomer having dissolved therein a protonated heterocyclic compound having a charge and dimension sufficient to firmly bind anionic contaminants.
Claim 22
Dependent Claim
29 words
A composition of matter comprising a room temperature vulcanizable silicone elastomer having dissolved therein a protonated heterocyclic compound having a charge and dimension sufficient to firmly bind anionic contaminants.
Claim 23
Dependent Claim
28 words
A composition of matter as recited in claim 19 wherein the protonated heterocyclic compound is selected from the group consisting of protonated crown ether, cryptate ether and cycloamines.
Claim 24
Dependent Claim
61 words
The composition of matter as recited in claim 20 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR10## wherein n is an integer from 1 to 3 and n 1 is an integer from zero to 3 and R and R 1 are selected from hydrogen and an organic radical.
Claim 25
Dependent Claim
60 words
The composition of matter as recited in claim 20 wherein the protonated heterocyclic compound is a protonated cryptate ether and wherein the cryptate ether has the structural formula: ##STR11## wherein n is an integer from zero to 3, n 1 is an integer from 1 to 3, n 2 is an integer from zero to 3 and any derivative thereof.
Claim 26
Dependent Claim
33 words
The composition of matter as recited in claim 20 wherein the protonated heterocyclic compound is a protonated crown ether having a 12 to 24 member ring with 4 to 8 oxygen atoms therein.
Claim 27
Dependent Claim
32 words
The composition of matter as recited in claim 20 wherein the protonated heterocyclic compound is a protonated cycloamine having a 12 to 18 member ring with 3 to 6 nitrogen atoms therein.
Claim 28
Dependent Claim
22 words
The composition of matter as recited in claim 19 wherein the heterocyclic compound is protonated by the addition of an organic acid.
Claim 29
Dependent Claim
39 words
The composition of matter as recited in claim 19 wherein the protonated heterocyclic compound is added to the elastomer in at least a stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulant.
Claim 30
Independent Claim
38 words
A method of immobilizing free anions on an electronic device which comprises applying to the device a protonated heterocyclic compound having a charge and dimension sufficient to firmly bind said free anions and an encapsulate for said device.
Claim 31
Independent Claim
38 words
A method of immobilizing free anions on an electronic device which comprises applying to the device a protonated heterocyclic compound having a charge and dimension sufficient to firmly bind said free anions and an encapsulate for said device.
Claim 32
Dependent Claim
14 words
The method as recited in claim 27, wherein the free anions include a halogen.
Claim 33
Dependent Claim
26 words
The method as recited in claim 27, wherein the protonated heterocyclic compound is selected from the group consisting of protonated cryptate ethers, crown ethers and cycloamines.
Claim 34
Dependent Claim
20 words
The method as recited in claim 27, wherein the heterocyclic compound is protonated by the addition of an organic acid.
Claim 35
Dependent Claim
37 words
The method as recited in claim 27, wherein the protonated heterocyclic compound is added to the encapsulate in at least a stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulate.
Claim 36
Dependent Claim
32 words
An article of manufacture comprising an electronic device having a polymeric encapsulate thereover, said encapsulate comprising a protonated heterocyclic compound having a charge and dimension so as to firmly bind anionic impurities.
Claim 37
Dependent Claim
32 words
An article of manufacture comprising an electronic device having a polymeric encapsulate thereover, said encapsulate comprising a protonated heterocyclic compound having a charge and dimension so as to firmly bind anionic impurities.
Claim 38
Dependent Claim
28 words
The article of manufacture as recited in claim 32, wherein the protonated heterocyclic compound is selected from the group consisting of protonated cryptate ethers, crown ethers and cycloamines.
Claim 39
Dependent Claim
22 words
The article of manufacture as recited in claim 32, wherein the heterocyclic compound is protonated by the addition of an organic acid.
Claim 40
Dependent Claim
39 words
The article of manufacture as recited in claim 32, wherein the protonated heterocyclic compound is present in the encapsulate in at least a stoichiometric molar quantity as determined by the number of moles of anionic impurity in the encapsulate.
Claim 41
Dependent Claim
25 words
A composition of matter comprising a polymeric encapsulant having dissolved therein a protonated heterocyclic compound having a charge and dimension sufficient to entrap anionic contaminants.
Claim 42
Dependent Claim
25 words
A composition of matter comprising a polymeric encapsulant having dissolved therein a protonated heterocyclic compound having a charge and dimension sufficient to entrap anionic contaminants.
References Cited (Backward Citations)
US2555169A
Cited
US3025269A
Cited
US3247155A
Cited
US4116887A
Cited
US4117029A
Cited
US4107180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |