US4771330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire bonds and electrical contacts of an integrated circuit device
Assignee: LSI Corp
•
Filing: 1987-05-13
•
Granted: 1988-09-13
•
Expires: 2007-05-13
Abstract
Abstract An integrated circuit devicer package includes a rigid frame and flexible tape assembly having wire leads between the die attach pad, conductive lead fingers, and the I.C. chip. A dam structure prevents resin flow to ensure proper wire bonding and a wedge prevents electrical shorting. A recognition pattern enables precise wire bonding. A epoxy molding compound is interposed in cavities formed in a Kapton layer to preclude delamination.
Inventors
- 👤 Jon Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:09
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/111; H10W72/00; H10W72/90; H10W70/00; H10W70/40; H10W70/464; H10W70/466; H10W70/479; H10W46/00; H10W46/101; H10W46/601; H10W72/071; H10W72/0711; H10W72/07173; H10W72/075; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/541; H10W72/5449; H10W72/951; H10W72/952; H10W90/00; H10W90/701; H10W90/751; H10W90/754; H10W90/756
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
An integrated circuit device package comprising: a relatively thin flexible tape-like structure having inner lead fingers and outer lead fingers; a rigid lead frame joined to said structure having internal leads aligned to and connected to said outer lead fingers; an integrated circuit die on which an integrated circuit is formed; a die attach pad to which said integrated circuit die is joined seated in said structure; wire leads connected to said integrated circuit die and to said lead fingers; a raised strip formed on said pad for separating said wire leads from said die attach pad to prevent contact of said wires with said pad; and a recognition pattern formed on said tape-like structure.
Claim 2
Dependent Claim
115 words
An integrated circuit device package comprising: a relatively thin flexible tape-like structure having inner lead fingers and outer lead fingers; a rigid lead frame joined to said structure having internal leads aligned to and connected to said outer lead fingers; an integrated circuit die on which an integrated circuit is formed; a die attach pad to which said integrated circuit die is joined seated in said structure; wire leads connected to said integrated circuit die and to said lead fingers; a raised strip formed on said pad for separating said wire leads from said die attach pad to prevent contact of said wires with said pad; and a recognition pattern formed on said tape-like structure.
Claim 3
Dependent Claim
31 words
An integrated circuit device package as in claim 1, wherein said recognition pattern comprises pairs of spaced elements, each pair having components that are collinear to define first and second axes.
Claim 4
Dependent Claim
20 words
An integrated circuit device package as in claim 2, wherein said first axis is substantially orthogonal to said second axis.
Claim 5
Dependent Claim
28 words
An integrated circuit device package as in claim 2, wherein said spaced elements are rectangular and sides of said rectangles are aligned along said first and second axes.
Claim 6
Dependent Claim
33 words
An integrated circuit device package as in claim 1, including an insulating film deposited over said tape-like structure, said film having cavities formed therein, and an epoxy molding compound contained within said cavities.
References Cited (Backward Citations)
JPS5624958A
Cited
JPS577953A
Cited
US4496965A
Cited
US4479298A
Cited
US4672421A
Cited
US4663650A
Cited
US4701781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |