US5083698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tip surmo-wick removal system
Assignee: Morgan Advanced Materials PLC
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Filing: 1990-02-26
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Granted: 1992-01-28
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Expires: 2010-02-26
Abstract
Abstract An effective, convenient, economical and safe system for installing and removing multi-sided gull-wing semiconductor devices from circuit boards without damaging the semiconductor device is provided. The solder removal system is formed by the combination of a surmo-multi-sided wick formed from welded braids and a solder removal gun that has been adapted with a corresponding multi-sided tip face with vacuum capability. An apparatus and process of using such apparatus thereof to produce the multi-sided shape surmo-wick used in the solder removal system are also provided.
Inventors
- 👤 Alan L. Forsha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:17
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/005; B23K1/0056; B23K26/00; B23K26/18; H; H05; H05K; H05K13/00; H05K13/04; H05K13/0486
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
An apparatus for producing a multi-sided surmo wick used for installing and removing microelectronic multi-sided surface mount devices comprising: a system controller that controls the operation of said apparatus; a side reel for feeding at least two strands of copper braid from a feed spool; a rung reel for feeding at least one strand of copper braid perpendicular to said at least two strands of copper braid; laser controllers to control laser beams being applied at a distance of at least 0.002 inch away from a focus of said laser beams to minimize reflection loss of said laser during welding; and a cutting lever to remove each multi-sided wick from said feed spool after said wick has been formed.
Claim 2
Independent Claim
119 words
An apparatus for producing a multi-sided surmo wick used for installing and removing microelectronic multi-sided surface mount devices comprising: a system controller that controls the operation of said apparatus; a side reel for feeding at least two strands of copper braid from a feed spool; a rung reel for feeding at least one strand of copper braid perpendicular to said at least two strands of copper braid; laser controllers to control laser beams being applied at a distance of at least 0.002 inch away from a focus of said laser beams to minimize reflection loss of said laser during welding; and a cutting lever to remove each multi-sided wick from said feed spool after said wick has been formed.
Claim 3
Dependent Claim
36 words
An apparatus as set forth in claim 1, wherein said controllers include means for controlling rung width, speed and timing of a stepper in feeding said copper braids to produce wicks of different dimensions and performance.
Claim 4
Dependent Claim
46 words
An apparatus as set forth in claim 1, wherein said strands of copper braid are of at least two in number and can be fed into said die through corresponding channels to produce wicks of a geometrical shape that fits telescopically over said surface mount device.
Claim 5
Dependent Claim
41 words
An apparatus as set forth in claim 1, wherein said copper strands used are braided from copper wire of a diameter of at least 26 gauge size and of at least 36 strands thick with at least 10 tucks per inch.
Claim 6
Dependent Claim
136 words
A process for producing a multi-sided wick useful for installing and removing microelectronic multi-sided surface mount devices comprising the steps of: controlling the operation of an apparatus for producing said wick with a system controller; feeding at least two strands of copper braid from a side reel feed spool; feeding at least one strand of copper braid perpendicular to said at least two strands of copper braid from a rung reel; receiving all said strands of copper braid in a die with channels; controlling laser beams being applied at a distance of at least 0.002 inch away from a focus of said laser beam to minimize reflection loss of said laser during welding with a laser controller; and removing each multi-sided wick from said feed spool after said wick has been formed with a cutting lever.
Claim 7
Dependent Claim
136 words
A process for producing a multi-sided wick useful for installing and removing microelectronic multi-sided surface mount devices comprising the steps of: controlling the operation of an apparatus for producing said wick with a system controller; feeding at least two strands of copper braid from a side reel feed spool; feeding at least one strand of copper braid perpendicular to said at least two strands of copper braid from a rung reel; receiving all said strands of copper braid in a die with channels; controlling laser beams being applied at a distance of at least 0.002 inch away from a focus of said laser beam to minimize reflection loss of said laser during welding with a laser controller; and removing each multi-sided wick from said feed spool after said wick has been formed with a cutting lever.
References Cited (Backward Citations)
US3627191A
Cited
US3945553A
Cited
US4066204A
Cited
US4436242A
Cited
US4805827A
Cited
US4934582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |