US4591053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit carrier
Assignee: 3M Co
•
Filing: 1984-07-06
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Granted: 1986-05-27
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Expires: 2004-07-06
Abstract
Abstract A one-piece integrated circuit carrier includes a base having a central opening bounded at opposite ends by walls having a plurality of narrow, parallel elongated grooves for receiving the leads of an integrated circuit flat pack inserted in the opening of the carrier. A pair of elongated resilient retaining fingers extend along opposite edges of the opening for connecting to the four outermost leads of the flat pack to hold the integrated circuit in the carrier. A pair of retaining fingers on each side of the carrier are supported from a narrow central support web, and the fingers extend in opposite directions from the support web generally parallel to the leads of the flat pack. The fingers terminate in free ends near the corners of the central opening in the carrier. Flanged tips at the free ends of the retaining fingers fit over the outermost leads of the flat pack to retain it. The flat pack is inserted into the carrier by pushing generally horizontally outwardly on the tips of the retaining fingers to spread them apart sufficiently to allow the body of the flat pack to be inserted in the opening of the carrier. The outermost leads of the flat pack bypass the spaced apart fingers so the leads can be inserted into the grooves at opposite ends of the opening. Upon release of the applied horizontal force the fingers return to normal positions in which the flanged tips of the fingers extend over and frictionally contact the tops of the outermost leads to retain the flat pack in the carrier. Advantages are that the flat pack is retained in the carrier by connection to leads instead of the flat pack body and the retaining fingers have improved resiliency and memory with reduced stress when connecting them to the leads, making continued reuse of the integrated circuit carrier possible.
Inventors
- 👤 James C. Alemanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:59
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0067; H10; H10P; H10P72/00; H10P72/70; H10P72/74
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
294 words
A carrier for an integrated circuit flat pack having a body with a plurality of leads projecting from opposite ends of the body, the carrier comprising a base; an opening in the base for receiving the body of the flat pack, the opening having opposite ends, spaced apart sides each extending between the opposite ends of the opening, and corner regions at the opposite ends of each side of the opening; lead-supporting walls adjacent the opposite ends of the opening having a plurality of grooves for receiving the leads of the flat pack, the grooves extending along generally parallel axes that traverse the opening; resilient retaining fingers supported from generally central regions of support on the opposite sides of the opening between said lead-supporting walls of the base, the retaining fingers on each side of the opening extending from said central region of support in opposite directions toward the respective corners of the opening and extending generally parallel to the length of the grooves in the lead-supporting walls, the retaining fingers having tips with lead-connecting means that project toward the opening generally perpendicular to the length of the fingers and to the length of the grooves at the opposite ends of the opening; the retaining fingers being bendable outwardly away from the opening under application of an external bending force generally horizontally outwardly for allowing the leads of the flat pack to bypass the bent retaining fingers and fit into the grooves at opposite ends of the opening, the retaining fingers returning to a normal locking position, when the external bending force is released, for positioning the lead-connecting means at the tips of the fingers over adjacent leads of the flat pack for retaining the flat pack body in the opening of the carrier.
Claim 2
Dependent Claim
294 words
A carrier for an integrated circuit flat pack having a body with a plurality of leads projecting from opposite ends of the body, the carrier comprising a base; an opening in the base for receiving the body of the flat pack, the opening having opposite ends, spaced apart sides each extending between the opposite ends of the opening, and corner regions at the opposite ends of each side of the opening; lead-supporting walls adjacent the opposite ends of the opening having a plurality of grooves for receiving the leads of the flat pack, the grooves extending along generally parallel axes that traverse the opening; resilient retaining fingers supported from generally central regions of support on the opposite sides of the opening between said lead-supporting walls of the base, the retaining fingers on each side of the opening extending from said central region of support in opposite directions toward the respective corners of the opening and extending generally parallel to the length of the grooves in the lead-supporting walls, the retaining fingers having tips with lead-connecting means that project toward the opening generally perpendicular to the length of the fingers and to the length of the grooves at the opposite ends of the opening; the retaining fingers being bendable outwardly away from the opening under application of an external bending force generally horizontally outwardly for allowing the leads of the flat pack to bypass the bent retaining fingers and fit into the grooves at opposite ends of the opening, the retaining fingers returning to a normal locking position, when the external bending force is released, for positioning the lead-connecting means at the tips of the fingers over adjacent leads of the flat pack for retaining the flat pack body in the opening of the carrier.
Claim 3
Dependent Claim
55 words
Apparatus according to claim 1 in which the opening is generally rectangular with enlarged corner regions, and in which separate retaining fingers project into corresponding enlarged corner regions of the opening, said enlarged corner regions for extending the length of the retaining fingers and providing a space into which the retaining fingers can be bent.
Claim 4
Dependent Claim
55 words
Apparatus according to claim 1 in which the retaining fingers are spaced inwardly from side walls of the opening that extend between the grooved lead-supporting walls of the base; and in which the fingers are bendable generally horizontally toward the side walls which act as stops against further outward bending movement of the retaining fingers.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 1 in which the lead-connecting means on the tips of the retaining fingers are aligned longitudinally with and project inwardly at an elevation above the bottom of the outermost grooves at opposite ends of the opening.
Claim 6
Dependent Claim
48 words
Apparatus according to claim 1 in which the lead-connecting portions of the fingers on each side of the opening are spaced apart by a distance slightly greater than the width of the flat pack body so the lead-connecting means engage the leads where they have the greatest stiffness.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1 in which the flat pack body is unsupported in the central opening and the leads are supported by the grooves in the lead-supporting walls and the connections to the retaining fingers.
Claim 8
Dependent Claim
30 words
Apparatus according to claim 1 in which the integrated circuit carrier is made from an anti-static material having a filler that increases electrical conductivity but decreases ductility of the material.
Claim 9
Independent Claim
316 words
A method for placing an integrated circuit flat pack into an integrated circuit carrier, in which the flat pack has a body with a plurality of leads projecting from opposite ends of the body; and the carrier has a central opening with generally parallel grooves adjacent opposite ends of the central opening, a pair of first resilient elongated retaining fingers having a first means of support near the center of a first side of the opening and extending from their first support means in opposite directions generally parallel to the grooves and terminating in free ends near the opposite corners at the first side of the opening, and a pair of second resilient elongated retaining fingers having a second means of support near the center of an opposite second side of the opening and extending from their second support means in opposite directions generally parallel to the grooves and terminating in free ends near opposite corners at the second side of the opening; the method comprising the steps of placing the flat pack in the carrier by first applying a generally horizontal force to the retaining fingers to spread them apart away from the opening and toward the first and second sides of the opening at which they are supported, by forcing the free ends of each pair of the retaining fingers toward their respective corners of the opening in response to pivoting the retaining fingers generally horizontally about their respective means of support; placing the flat pack body in the central opening with the leads positioned in the grooves; and then releasing the generally horizontal force on the fingers to allow the fingers to bend back inwardly toward the opening to a normal position in which connecting means on the tips of the fingers extend over the outermost leads of the flat pack to contact the fingers and retain the flat pack in the carrier.
Claim 10
Independent Claim
316 words
A method for placing an integrated circuit flat pack into an integrated circuit carrier, in which the flat pack has a body with a plurality of leads projecting from opposite ends of the body; and the carrier has a central opening with generally parallel grooves adjacent opposite ends of the central opening, a pair of first resilient elongated retaining fingers having a first means of support near the center of a first side of the opening and extending from their first support means in opposite directions generally parallel to the grooves and terminating in free ends near the opposite corners at the first side of the opening, and a pair of second resilient elongated retaining fingers having a second means of support near the center of an opposite second side of the opening and extending from their second support means in opposite directions generally parallel to the grooves and terminating in free ends near opposite corners at the second side of the opening; the method comprising the steps of placing the flat pack in the carrier by first applying a generally horizontal force to the retaining fingers to spread them apart away from the opening and toward the first and second sides of the opening at which they are supported, by forcing the free ends of each pair of the retaining fingers toward their respective corners of the opening in response to pivoting the retaining fingers generally horizontally about their respective means of support; placing the flat pack body in the central opening with the leads positioned in the grooves; and then releasing the generally horizontal force on the fingers to allow the fingers to bend back inwardly toward the opening to a normal position in which connecting means on the tips of the fingers extend over the outermost leads of the flat pack to contact the fingers and retain the flat pack in the carrier.
Claim 11
Dependent Claim
60 words
The method according to claim 8 including providing a space on the side of each finger away from the central opening so that each finger can be bent into the space and can contact a rear wall of the space to provide a stop against further outward bending movement of the fingers to limit the stress imposed on the fingers.
Claim 12
Dependent Claim
37 words
The method according to claim 8 in which the flat pack body is unsupported in the central opening, and the leads are supported by the grooves in the lead-supporting walls and the connections to the retaining fingers.
Claim 13
Dependent Claim
54 words
Apparatus according to claim 6 in which the opening is generally rectangular with enlarged corner regions, and in which separate retaining fingers project into corresponding enlarged corner regions of the opening, said enlarged corner regions for extending the length of the fingers and providing a space into which the retaining fingers can be bent.
Claim 14
Dependent Claim
48 words
Apparatus according to claim 11 in which the retaining fingers are spaced inwardly from the enlarged corner regions of the opening, and in which the retaining fingers are bendable generally horizontally toward the side walls which act as stops against further outward bending movement of the retaining fingers.
Claim 15
Dependent Claim
48 words
Apparatus according to claim 2 in which the retaining fingers are spaced inwardly from the enlarged corner regions of the opening, and in which the retaining fingers are bendable generally horizontally toward the side walls which act as stops against further outward bending movement of the retaining fingers.
Claim 16
Dependent Claim
30 words
Apparatus according to claim 13 in which the integrated circuit carrier is made from an anti-static material having a filler that increases electrical conductivity but decreases ductility of the material.
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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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |