US4813588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inspection and repair of tab lifted leads
Assignee: Micro Robotics Systems Inc
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Filing: 1987-09-25
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Granted: 1989-03-21
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Expires: 2007-09-25
Abstract
Abstract An optical video system for the inspection and repair of TAB lifted leads. Three distinct light sources are aligned at different angles to illuminate the side of a lead-solder-pad joint. Each of the surfaces of the joint are readily distinguished.
Inventors
- 👤 Nilendu Srivastava
- 👤 Fei-Jain Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:01
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/082; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49131
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
158 words
An optical video system for viewing at least two distinct surfaces, said surfaces lying in substantially the same plane, which plane intersects a supporting surface which comprises: a first collimated source of illumination forward of the surfaces under investigation, the axis of said illumination lying in a plane substantially normal to said surface, said axis at an angle of 45° to 65° with reference to the supporting surface; a second fluorescent source of illumination rearward of the surfaces, the axis of said illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 45° to 65° with reference to the supporting surface; a third fiber optic source of illumination forward of the surface under investigation, and its axis at an angle of 20° to 40° with reference to both the supporting surface and the plane of the surfaces under investigation, said first, second and third sources defining an area of illumination.
Claim 2
Dependent Claim
158 words
An optical video system for viewing at least two distinct surfaces, said surfaces lying in substantially the same plane, which plane intersects a supporting surface which comprises: a first collimated source of illumination forward of the surfaces under investigation, the axis of said illumination lying in a plane substantially normal to said surface, said axis at an angle of 45° to 65° with reference to the supporting surface; a second fluorescent source of illumination rearward of the surfaces, the axis of said illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 45° to 65° with reference to the supporting surface; a third fiber optic source of illumination forward of the surface under investigation, and its axis at an angle of 20° to 40° with reference to both the supporting surface and the plane of the surfaces under investigation, said first, second and third sources defining an area of illumination.
Claim 3
Dependent Claim
22 words
The system of claim 1 wherein the surfaces lie in a vertical plane with reference to the plane of the support surface.
Claim 4
Dependent Claim
14 words
The system of claim 2 wherein the surface under investigation comprise three distinct surfaces.
Claim 5
Dependent Claim
47 words
The system of claim 1 wherein the third source of illumination is at an angle of between 20° to 40° with reference to the plane of the supporting surface and at an angle of 20° to 40° with reference to the plane of the surfaces under investigation.
Claim 6
Dependent Claim
24 words
The system of claim 4 wherein said third source comprises first and second sources each said third source being a fiber optic light source.
Claim 7
Dependent Claim
18 words
The system of claim 1 wherein the means to view the surfaces under investigation is a stereo microscope.
Claim 8
Dependent Claim
19 words
The system of claim 1 wherein the means to view the surfaces under investigation includes a video display system.
Claim 9
Dependent Claim
13 words
The system of claim 1 which includes means to bond the surfaces together.
Claim 10
Dependent Claim
16 words
The system of claim 1 wherein the axes of illumination intersect at a common point P.
Claim 11
Dependent Claim
41 words
The system of claim 9 wherein the surfaces comprise at least one side of a TAB joint, the joint comprising a lead-solder-pad assembly, said joint having a top surface, the point P located at the approximate center of the top surface.
Claim 12
Dependent Claim
24 words
The system of claim 10 which includes means to rotate the joint about an axis normal to the supporting surface and passing point P.
Claim 13
Dependent Claim
38 words
The system of claim 10 wherein the TAB includes a plurality of joints, the successive joints being spaced apart in parallel relationship and which includes means to move the surfaces of successive joints into the area of illumination.
Claim 14
Independent Claim
175 words
A method for viewing at least two distinct surfaces, said surfaces lying in substantially the same plane, which plane intersects the supporting surface on which the distinct surfaces lie, which includes: creating a first collimate source of illumination forward of the surface under investigation, the axis of illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 25° to 45° with reference to the supporting surface; creating a second fluorescent source of illumination rearward of the surfaces, the axis of illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 45° to 65°; creating a third fiber optic source of illumination forward of the surfaces under investigation, its axis at an angle of 20° to 40° with reference to both the supporting surface and the surface under investigation; distinguishing between first and second surfaces by: aligning the axes of said sources of illumination to define an area of illumination on the surfaces under investigation; and viewing the illuminated surfaces.
Claim 15
Independent Claim
175 words
A method for viewing at least two distinct surfaces, said surfaces lying in substantially the same plane, which plane intersects the supporting surface on which the distinct surfaces lie, which includes: creating a first collimate source of illumination forward of the surface under investigation, the axis of illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 25° to 45° with reference to the supporting surface; creating a second fluorescent source of illumination rearward of the surfaces, the axis of illumination lying in a plane substantially normal to the surface under investigation, said axis at an angle of 45° to 65°; creating a third fiber optic source of illumination forward of the surfaces under investigation, its axis at an angle of 20° to 40° with reference to both the supporting surface and the surface under investigation; distinguishing between first and second surfaces by: aligning the axes of said sources of illumination to define an area of illumination on the surfaces under investigation; and viewing the illuminated surfaces.
Claim 16
Dependent Claim
48 words
The method of claim 13 which includes: positioning the third source of illumination at an angle of between 30° to 40° with reference to the plane of the supporting surface and at an angle of 20° to 40° with reference to the plane of the surface under investigation.
Claim 17
Dependent Claim
18 words
The method of claim 14 wherein said third source of illumination comprises first and second fiber optic sources.
Claim 18
Dependent Claim
13 words
The method of claim 13 which includes: displaying visually the surfaces under investigation.
Claim 19
Dependent Claim
14 words
The method of claim 1 which includes: bonding said first and second surfaces together.
Claim 20
Dependent Claim
22 words
The method of claim 13 which includes: positioning the axes of illumination such that said axes intersect at a common point P.
Claim 21
Dependent Claim
7 words
The method of claim 13 which includes:
Claim 22
Dependent Claim
31 words
rotating the joint 180° about a z axis normal to the support surface and which passes through the point P; and viewing the surfaces of the other side of the joint.
Claim 23
Dependent Claim
31 words
rotating the joint 180° about a z axis normal to the support surface and which passes through the point P; and viewing the surfaces of the other side of the joint.
Claim 24
Dependent Claim
37 words
The method of claim 13 wherein the TAB includes a plurality of joints said joints said joints being spaced apart in parallel relationship which includes: moving sequentially the joints of the TAB into the area of illumination.
References Cited (Backward Citations)
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US3982979A
Cited
US3997100A
Cited
US4342090A
Cited
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Cited
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |