US4351580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier socket for leadless integrated circuit devices
Assignee: ABB Installation Products International LLC
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Filing: 1980-05-15
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Granted: 1982-09-28
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Expires: 2000-05-15
Abstract
Abstract A carrier socket for leadless chip integrated circuit devices. A flat leadless substrate with a circuit chip thereon is positioned within a housing having spring-loaded contacts mounted therein, each such contact adapted to engage a contact pad on the substrate. A resilient cover engages the housing and holds the substrate against the contacts in a positive manner. The contacts are formed to facilitate electrical connection between the integrated circuit chip and a circuit board. The contacts may be secured to the board by various means such as soldering or planar welding.
Inventors
- 👤 Michael Kirkman
- 👤 Frank C. Rydwansky, Jr.
- 👤 Richard J. Hanlon
- 👤 Richard W. Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/02; H05K7/10; H05K7/1053; H05K7/1061
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
178 words
A carrier socket for a leadless chip integrated circuit having a predetermined exterior dimension, said socket comprising: a generally rectangular base formed with upright corner posts having flat right angled outer walls which have flat surfaces, the flat surfaces on opposed posts defining a plane, said base having side walls extending between said posts, said side walls having outer surfaces, there being a plurality of longitudinal slots in said outer surfaces, said slots being opened outwardly and exposed at the outer surfaces of said walls, said base having an outer dimension defined by the planes which include the flat surfaces of said corner posts, said outer dimension substantially matching the exterior dimension of said integrated circuit, thereby to enable the edges of said circuit to extend out to the exterior dimension of said base; a plurality of contact members, one said contact member residing in each of at least some of said slots; and a cover member extending between said corner posts and being substantially coextensive with said base member, said cover member removably engaging said base member.
Claim 2
Dependent Claim
178 words
A carrier socket for a leadless chip integrated circuit having a predetermined exterior dimension, said socket comprising: a generally rectangular base formed with upright corner posts having flat right angled outer walls which have flat surfaces, the flat surfaces on opposed posts defining a plane, said base having side walls extending between said posts, said side walls having outer surfaces, there being a plurality of longitudinal slots in said outer surfaces, said slots being opened outwardly and exposed at the outer surfaces of said walls, said base having an outer dimension defined by the planes which include the flat surfaces of said corner posts, said outer dimension substantially matching the exterior dimension of said integrated circuit, thereby to enable the edges of said circuit to extend out to the exterior dimension of said base; a plurality of contact members, one said contact member residing in each of at least some of said slots; and a cover member extending between said corner posts and being substantially coextensive with said base member, said cover member removably engaging said base member.
Claim 3
Dependent Claim
46 words
The carrier socket recited in claim 1 wherein said cover member is formed with a substantially open central portion and a plurality of downwardly projecting tabs acting as leaf springs, said leaf springs being adapted to engage a surface parallel with and below said cover member.
Claim 4
Dependent Claim
67 words
The carrier socket recited in claim 2 wherein: at least two of said corner posts are formed with lug engaging means; said cover member further comprises: a downwardly projecting corner extension on at least two opposite corners; and lug means at the distal ends of each said corner extension, said lug means engaging one of said lug engaging means to retain said cover member on said base.
Claim 5
Dependent Claim
35 words
The carrier socket recited in claim 3 wherein: said lug engaging means comprises a downwardly projecting ridge; and each said lug means is formed with tabs bent toward each other to substantially surround said ridge.
Claim 6
Dependent Claim
41 words
The carrier socket recited in claim 4 wherein said each of said at least two corner posts are formed with a relief groove positioned inwardly from said ridge, the top surface of said tabs engaging said groove surface behind said ridge.
Claim 7
Dependent Claim
51 words
The carrier socket recited in claim 4 wherein: at least one of said corner posts has an upwardly projecting peg which is substantially smaller in cross section than said corner post; and said cover is formed with at least one notch engaging said peg when said lug means engage said ridges.
Claim 8
Dependent Claim
48 words
The carrier socket recited in claim 1 wherein: each said longitudinal slot extends the entire width of said side walls; and each said contact member is formed with a bottom tang projecting below said side wall and a top spade extending beyond the upper end of said slot.
Claim 9
Dependent Claim
50 words
The carrier socket recited in claim 7 wherein: said side walls are formed with a planar top bearing surface coincident with the upper end of said slot; and said socket is formed with a depression located inwardly and centrally of said side walls, said depression being below said bearing surface.
Claim 10
Dependent Claim
31 words
The carrier socket recited in claim 7 wherein said contact member is formed with a barb intermediate said spade and said tang, said barb being in interference fit with said slot.
Claim 11
Dependent Claim
34 words
The carrier socket recited in claim 9 wherein each said slot is formed with an upwardly facing shoulder adjacent the bottom end of said slot, said shoulder providing a positive stop for said barb.
Claim 12
Dependent Claim
27 words
The carrier socket recited in claim 7 or 10 wherein said contact member is preformed with an outward deflection to provide said contact member with longitudinal resiliency.
Claim 13
Dependent Claim
30 words
The carrier socket recited in claim 11 wherein said top spade is bent inwardly toward said side wall of said base to provide said contact member with additional longitudinal resiliency.
Claim 14
Dependent Claim
20 words
The carrier socket recited in claim 7 wherein said tang extends downwardly, adapted to be soldered below said carrier socket.
Claim 15
Dependent Claim
36 words
The carrier socket recited in claim 7 wherein said tang extends outwardly from the bottom of said slot, said tang being adapted to be connected to surfaces substantially coplanar with the bottom of said carrier socket.
Claim 16
Dependent Claim
71 words
The carrier socket recited in claim 1 or 2 wherein said carrier socket is adapted to retain a leadless substrate for an integrated circuit chip, said substrate being formed with a plurality of electrical contact pads on one surface thereof, said substrate residing on top of said side walls between said corner posts with at least some of said contact pads being in physical contact with one of said contact members.
Claim 17
Dependent Claim
34 words
The carrier socket recited in claim 15 wherein said cover member is adapted to bear against the opposite surface of said substrate and removably and resiliently retain said substrate in place on said base.
Claim 18
Dependent Claim
40 words
The carrier socket recited in claim 15 wherein said leaf springs are adapted to bear against the opposite surface of said substrate and resiliently retain said substrate on said base with said contact pads in engagement with said contact elements.
Claim 19
Dependent Claim
73 words
The carrier socket recited in claim 15 wherein: said side walls are formed with a planar top bearing surface coincident with the upper end of said slot; said socket is formed with a depression located inwardly and centrally of said side walls, said depression being below said bearing surface; and said one surface of said substrate is adapted to be adjacent said bearing surface and said integrated circuit chip resides in said depression.
References Cited (Backward Citations)
US3953101A
Cited
US3771109A
Cited
US3910664A
Cited
US3846737A
Cited
US3877064A
Cited
US3940786A
Cited
US3951495A
Cited
US4045105A
Cited
US3904262A
Cited
US3982159A
Cited
US3998512A
Cited
US3993384A
Cited
US4018494A
Cited
US4144648A
Cited
US4089575A
Cited
US4063791A
Cited
US4130327A
Cited
US4221448A
Cited
US4155615A
Cited
US4220383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |