US3913223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a double-sided circuit
Assignee: Thales SA
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Filing: 1973-10-24
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Granted: 1975-10-21
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Expires: 1993-10-24
Abstract
Abstract A method for manufacturing a double-sided circuit designed to form a multilayers circuit structure comprises successively deposition of conductor layer and conductor stud having contact surface upon a temporary substrate which is eliminated by etching with a chemical agent and replaced by a dielectric material which recovers the double sided-circuit except on a level with said contact surfaces.
Inventors
- 👤 Claude Gigoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:07
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K3/4611; H05K3/4614; H05K3/462; H05K3/02; H05K3/06; H05K3/061; H05K3/062; H05K3/10; H05K3/20; H05K3/205; H05K3/40; H05K3/42; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0305; H05K2201/0332; H05K2201/0335; H05K2201/0361; H05K2201/0364; H05K2201/0367; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09536; H05K2201/09563; H05K2203/00; H05K2203/03; H05K2203/0376; H05K2203/07; H05K2203/0703; H05K2203/0726; H05K3/22; H05K3/28; H05K3/4007; H05K3/4038; H05K3/4623; H05K3/4644; H05K3/4647; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49158
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
54 words
A METHOD OF MANUFACTURING A DOUBLE-SIDED CIRCUIT COMPRISING AT LEAST ONE STUD AND AT LEAST ONE CONTACT SURFACE SUCH THAT AFTER STACKING OF SAID CIRCUIT WITH ONE ANOTHER CIRCUIT OF THE SAME TYPE A STUD OF SAID CIRCUIT IS IN CONTACT WITH A SURFACE OF SAID ANOTHER CIRCUIT SAID METHOD COMPRISING THE FOLLOWING STEPS:
Claim 2
Independent Claim
54 words
A METHOD OF MANUFACTURING A DOUBLE-SIDED CIRCUIT COMPRISING AT LEAST ONE STUD AND AT LEAST ONE CONTACT SURFACE SUCH THAT AFTER STACKING OF SAID CIRCUIT WITH ONE ANOTHER CIRCUIT OF THE SAME TYPE A STUD OF SAID CIRCUIT IS IN CONTACT WITH A SURFACE OF SAID ANOTHER CIRCUIT SAID METHOD COMPRISING THE FOLLOWING STEPS:
Claim 3
Dependent Claim
54 words
UPON A TEMPORARY SUBSTRATE ETCHABLE BY PREDETERMINED CHEMICAL AGENT HAVING TWO OPPOSITE FACES FORMING THROUGH A FIRST APPROPRIATE MASK OF PHOTOSENSITIVE RESIN DEPOSITED UPON SAID TWO FACES, FIRST SECOND AND THIRD ZONES WHERE SAID RESIN IS ELIMINATED TO BARE SAID SUBSTRATE, SAID FIRST AND SECOND ZONES BEING OPPOSITE UPON EACH OF SAID TWO FACES,
Claim 4
Dependent Claim
54 words
UPON A TEMPORARY SUBSTRATE ETCHABLE BY PREDETERMINED CHEMICAL AGENT HAVING TWO OPPOSITE FACES FORMING THROUGH A FIRST APPROPRIATE MASK OF PHOTOSENSITIVE RESIN DEPOSITED UPON SAID TWO FACES, FIRST SECOND AND THIRD ZONES WHERE SAID RESIN IS ELIMINATED TO BARE SAID SUBSTRATE, SAID FIRST AND SECOND ZONES BEING OPPOSITE UPON EACH OF SAID TWO FACES,
Claim 5
Dependent Claim
16 words
ETCHING SAID SUBSTRATE THROUGH SAID FIRST AND SECOND ZONES TO FORM A HOLE THROUGH SAID SUBSTRATE,
Claim 6
Dependent Claim
16 words
ETCHING SAID SUBSTRATE THROUGH SAID FIRST AND SECOND ZONES TO FORM A HOLE THROUGH SAID SUBSTRATE,
Claim 7
Dependent Claim
16 words
etching said substrate through said first and second zones to form a hole through said substrate;
Claim 8
Dependent Claim
16 words
etching said substrate through said first and second zones to form a hole through said substrate;
Claim 9
Dependent Claim
15 words
A method as claimed in claim 1, wherein said substrate is made of a metal.
Claim 10
Dependent Claim
12 words
A method as claimed in claim 1, wherein said metal is copper.
Claim 11
Dependent Claim
21 words
depositing by electrolysis a first layer of a metal resistant to said agent upon said third zone corresponding to said stud;
Claim 12
Dependent Claim
21 words
depositing by electrolysis a first layer of a metal resistant to said agent upon said third zone corresponding to said stud;
Claim 13
Dependent Claim
21 words
DEPOSITING BY ELECTROLYSIS A FIRST LAYER OF A METAL RESISTANT TO SAID AGENT UPON SAID THIRD ZONE CORRESPONDING TO SAID STUD,
Claim 14
Dependent Claim
21 words
DEPOSITING BY ELECTROLYSIS A FIRST LAYER OF A METAL RESISTANT TO SAID AGENT UPON SAID THIRD ZONE CORRESPONDING TO SAID STUD,
Claim 15
Dependent Claim
13 words
BARING SAID SUBSTRATE THROUGH A SECOND APPROPRIATE MASK ACCORDING TO A PRETERMINED PATTERN
Claim 16
Dependent Claim
13 words
BARING SAID SUBSTRATE THROUGH A SECOND APPROPRIATE MASK ACCORDING TO A PRETERMINED PATTERN
Claim 17
Dependent Claim
13 words
baring said substrate through a second appropriate mask according to a predetermined pattern;
Claim 18
Dependent Claim
13 words
baring said substrate through a second appropriate mask according to a predetermined pattern;
Claim 19
Dependent Claim
13 words
A method as claimed in claim 1, wherein said resisting metal is gold.
Claim 20
Dependent Claim
14 words
A method as claimed in claim 1, wherein said material is a polyimide resin.
Claim 21
Dependent Claim
38 words
depositing by electrOlysis said resisting metal everywhere said substrate is bared in order to form at least a first and a second conductor, said first conductor laying upon said first layer and upon the wall of said hole;
Claim 22
Dependent Claim
38 words
depositing by electrOlysis said resisting metal everywhere said substrate is bared in order to form at least a first and a second conductor, said first conductor laying upon said first layer and upon the wall of said hole;
Claim 23
Dependent Claim
38 words
DEPOSITING BY ELECTROLYSIS SAID RESISTING METAL EVERYWHERE SAID SUBSTRATE IS BARED IN ORDER TO FORM AT LEAST A FIRST AND A SECOND CONDUCTOR SAID FIRST CONDUCTOR LAYING UPON SAID FIRST LAYER AND UPON THE WALL OF SAID HOLE,
Claim 24
Dependent Claim
38 words
DEPOSITING BY ELECTROLYSIS SAID RESISTING METAL EVERYWHERE SAID SUBSTRATE IS BARED IN ORDER TO FORM AT LEAST A FIRST AND A SECOND CONDUCTOR SAID FIRST CONDUCTOR LAYING UPON SAID FIRST LAYER AND UPON THE WALL OF SAID HOLE,
Claim 25
Dependent Claim
52 words
DEPOSITING A FIRST FILM OF RESIN OF POSITIVE TYPE ON THE FACE OF THE DEVICE THUS OBTAINED CORRESPONDING TO SAID STUD AND A SECOND FILM OF SAID RESIN UPON THE OPPOSED FACE AND DEPOSITING UPON SAID SECOND FILM A PROTECTIVE FILM OF DRY PHOTOSENSITIVE RESIN OF NEGATIVE TYPE COVERED WITH POLYETHYLENE TEREPHTHALATE,
Claim 26
Dependent Claim
52 words
DEPOSITING A FIRST FILM OF RESIN OF POSITIVE TYPE ON THE FACE OF THE DEVICE THUS OBTAINED CORRESPONDING TO SAID STUD AND A SECOND FILM OF SAID RESIN UPON THE OPPOSED FACE AND DEPOSITING UPON SAID SECOND FILM A PROTECTIVE FILM OF DRY PHOTOSENSITIVE RESIN OF NEGATIVE TYPE COVERED WITH POLYETHYLENE TEREPHTHALATE,
Claim 27
Dependent Claim
52 words
depositing a first film of resin of positive type on the face of the device thus obtained, corresponding to said stud and a second film of said resin upon the opposed face, and depositing upon said second film a protective film of dry photosensitive resin of negative type covered with polyethylene terephthalate;
Claim 28
Dependent Claim
52 words
depositing a first film of resin of positive type on the face of the device thus obtained, corresponding to said stud and a second film of said resin upon the opposed face, and depositing upon said second film a protective film of dry photosensitive resin of negative type covered with polyethylene terephthalate;
Claim 29
Dependent Claim
46 words
etching a first part of said temporary substrate through a window made in said first film to hollow out a recess beneath said second conductor over half the width of said second conductor, and replacing said first part and said first film with said dielectric material;
Claim 30
Dependent Claim
46 words
etching a first part of said temporary substrate through a window made in said first film to hollow out a recess beneath said second conductor over half the width of said second conductor, and replacing said first part and said first film with said dielectric material;
Claim 31
Dependent Claim
46 words
ETXCHING A FIRST PART OF SAID TEMPORARY SUBSTRATE THROUGH A WINDOW MADE IN SAID FIRST FILM TO HOLLOW OUT A RECESS BENEATH SAID SECOND CONDUCTOR OVER HALF THE WIDTH OF SAID SECOND CONDUCTOR AND REPLACING SAID FIRST PART AND SAID FIRST FILM WITH SAID DIELECTRIC MATERIAL,
Claim 32
Dependent Claim
46 words
ETXCHING A FIRST PART OF SAID TEMPORARY SUBSTRATE THROUGH A WINDOW MADE IN SAID FIRST FILM TO HOLLOW OUT A RECESS BENEATH SAID SECOND CONDUCTOR OVER HALF THE WIDTH OF SAID SECOND CONDUCTOR AND REPLACING SAID FIRST PART AND SAID FIRST FILM WITH SAID DIELECTRIC MATERIAL,
Claim 33
Dependent Claim
8 words
ETCHING THE OTHER PART OF SAID TEMPORARY SUBSTRATE
Claim 34
Dependent Claim
8 words
ETCHING THE OTHER PART OF SAID TEMPORARY SUBSTRATE
Claim 35
Dependent Claim
8 words
etching the other part of said temporary substrate
Claim 36
Dependent Claim
8 words
etching the other part of said temporary substrate
Claim 37
Dependent Claim
10 words
recovering said both faces thus obtained with said dielectric material;
Claim 38
Dependent Claim
10 words
recovering said both faces thus obtained with said dielectric material;
Claim 39
Dependent Claim
10 words
RECOVERING SAID BOTH FACES THUS OBTAINED WITH SAID DIELECTRIC MATERIAL,
Claim 40
Dependent Claim
10 words
RECOVERING SAID BOTH FACES THUS OBTAINED WITH SAID DIELECTRIC MATERIAL,
Claim 41
Dependent Claim
16 words
ENGRAVING SAID MATERIAL THROUGH A THIRD APPROPRIATE MASK TO BARE SAID STUD AND SAID CONACT SURFACE.
Claim 42
Dependent Claim
16 words
ENGRAVING SAID MATERIAL THROUGH A THIRD APPROPRIATE MASK TO BARE SAID STUD AND SAID CONACT SURFACE.
Claim 43
Dependent Claim
16 words
engraving said material through a third appropriate mask to bare said stud and said contact surface.
Claim 44
Dependent Claim
16 words
engraving said material through a third appropriate mask to bare said stud and said contact surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |