US5530295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop-in heat sink
Assignee: Intel Corp
•
Filing: 1995-05-26
•
Granted: 1996-06-25
•
Expires: 2015-05-26
Abstract
Abstract A heat sink incorporated into an electronic package. The package contains an integrated circuit enclosed by a dielectric housing. Coupled to the circuit is a lead frame which has a plurality of leads that extend from the outer edges of the housing. The heat sink has a bottom surface pressed against the lead frame and an opposite top surface that is exposed to the ambient. The heat sink also has a pair of oblique steps which engage the housing and insure that the sink does not become detached from the package.
Inventors
- 👤 Behrooz Mehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:41
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/01; H10W74/016; H10W40/00; H10W40/70; H10W40/77; H10W40/778; H10W90/00; H10W90/701; H10W90/751; H10W90/756; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121; Y10T29/49169; Y10T29/49171; Y10T29/4935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
An electronic package, comprising: a housing; an integrated circuit within said housing; a lead frame coupled to said integrated circuit; a heat sink embedded within said housing, said heat sink having a top surface, a first outwardly tapered surface that extends to a first edge, a first step surface that extends inward from said first edge essentially parallel with said top surface, a second outwardly tapered surface that extends from said first step surface to a second edge, a second step surface that extends inward from said second edge essentially parallel with said top surface, and a third outwardly tapered surface that extends from said second step surface to a third edge.
Claim 2
Dependent Claim
112 words
An electronic package, comprising: a housing; an integrated circuit within said housing; a lead frame coupled to said integrated circuit; a heat sink embedded within said housing, said heat sink having a top surface, a first outwardly tapered surface that extends to a first edge, a first step surface that extends inward from said first edge essentially parallel with said top surface, a second outwardly tapered surface that extends from said first step surface to a second edge, a second step surface that extends inward from said second edge essentially parallel with said top surface, and a third outwardly tapered surface that extends from said second step surface to a third edge.
Claim 3
Dependent Claim
18 words
The heat sink as recited in claim 1, wherein said heat sink is attached to said lead frame.
Claim 4
Dependent Claim
19 words
The package as recited in claim 1, further comprising a heat fin that is attached to said heat sink.
References Cited (Backward Citations)
US4092697A
Cited
US4326215A
Cited
US4360141A
Cited
US4530003A
Cited
US4415025A
Cited
US4538168A
Cited
JPS607155A
Cited
JPS60137042A
Cited
US4603374A
Cited
JPS6139555A
Cited
JPS6149446A
Cited
US4605058A
Cited
US4833567A
Cited
JPS6347959A
Cited
JPS6355966A
Cited
JPS63205935A
Cited
JPS6431443A
Cited
JPS6459841A
Cited
US4833766A
Cited
US4777560A
Cited
US4771365A
Cited
US4888637A
Cited
US5289039A
Cited
JPH0249457A
Cited
US5028984A
Cited
SU1691913A1
Cited
JPH02237055A
Cited
US5180001A
Cited
JPH0378246A
Cited
US5227663A
Cited
US5345106A
Cited
US5105259A
Cited
US5213153A
Cited
US5172213A
Cited
US5253702A
Cited
JPH0697326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-25 | 1999-12-25 | 2000-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-25 | 2003-12-25 | 2004-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-25 | 2007-12-25 | 2008-06-25 | $7700.00 | Window Closed / Lapsed |