US5471011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous thermoplastic semi-conductor chip carrier package
Assignee: Amkor Technology Singapore Holding Pte Ltd
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Filing: 1994-05-26
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Granted: 1995-11-28
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Expires: 2014-05-26
Abstract
Abstract A homogeneous thermoplastic semi-conductor chip carrier cavity package (HC package) which utilizes the same thermoplastic for various integral attachments to the HC package, such as, a molded lid and a circuit substrate. A chemical bonding or fusing of the integral attachments to the HC package provides increased protection from having moisture enter into the cavity of the HC package. The HC package eliminates problems which are associated with having different coefficients of thermal expansion for the HC package and its various integral attachments.
Inventors
- 👤 William H. Maslakow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:13
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/62; H10W70/63; H10W70/635; H10W40/00; H10W40/10; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; H10W76/17; H10W76/18; H10W76/40; H10W76/42; H10W76/47; H10W90/00; H10W90/701; H10W72/00; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/541; H10W72/5445; H10W90/751; H10W90/756; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121; Y10T29/49124; Y10T29/49126
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
153 words
A thermoplastic chip carrier cavity package, said cavity package comprising: a circuit substrate which is laminated with a suitable thermoplastic in order to form a base, said base providing integral reinforcement of said circuit substrate, said circuit substrate comprising: a chip die mounting pad; and a plurality of lead traces each of which are located so as to provide electrical isolation from each other and said chip die mounting pad; a lead frame comprising a plurality of lead members each of which is attached to a different one of said plurality of lead traces; a casing, which is comprised of said suitable thermoplastic, said casing covering said laminated circuit substrate and said lead frame so that a cavity is formed, and said casing being chemically fused to a portion of said base of said laminated circuit substrate; and a lid which is comprised of said suitable thermoplastic and chemically fused to said cavity.
Claim 2
Dependent Claim
153 words
A thermoplastic chip carrier cavity package, said cavity package comprising: a circuit substrate which is laminated with a suitable thermoplastic in order to form a base, said base providing integral reinforcement of said circuit substrate, said circuit substrate comprising: a chip die mounting pad; and a plurality of lead traces each of which are located so as to provide electrical isolation from each other and said chip die mounting pad; a lead frame comprising a plurality of lead members each of which is attached to a different one of said plurality of lead traces; a casing, which is comprised of said suitable thermoplastic, said casing covering said laminated circuit substrate and said lead frame so that a cavity is formed, and said casing being chemically fused to a portion of said base of said laminated circuit substrate; and a lid which is comprised of said suitable thermoplastic and chemically fused to said cavity.
Claim 3
Dependent Claim
34 words
The cavity package of claim 1 further comprising: a chip die attached to said chip die mounting pad; and a plurality of fragile wires connecting said chip die to said plurality of lead traces.
Claim 4
Dependent Claim
13 words
The cavity package of claim 1 wherein said suitable thermoplastic is polyphenylene sulfide.
Claim 5
Dependent Claim
12 words
The cavity package of claim 1 wherein said suitable thermoplastic is polyethersulphone.
Claim 6
Dependent Claim
12 words
The cavity package of claim 1 wherein said suitable thermoplastic is polyarylsulphone.
Claim 7
Dependent Claim
12 words
The cavity package of claim 1 wherein said suitable thermoplastic is polysulfone.
Claim 8
Dependent Claim
19 words
The cavity package of claim 1 wherein said chip die mounting pad is an etched chip die mounting pad.
Claim 9
Dependent Claim
32 words
The cavity package of claim 7 wherein said circuit substrate includes a plurality of etched lead traces each of which are adjacent and physically separate from said etched chip die mounting pad.
Claim 10
Dependent Claim
15 words
The cavity package of claim 1 wherein said circuit substrate is a printed circuit board.
Claim 11
Dependent Claim
15 words
The cavity package of claim 1 wherein said circuit substrate is a printed wire board.
Claim 12
Dependent Claim
32 words
The cavity package of claim 1 wherein each one of said plurality of lead traces includes: an inner lead trace finger; an outer lead trace member; and an intermediate lead trace portion.
Claim 13
Dependent Claim
28 words
The package of claim 11 wherein each one of said plurality of lead members includes: an inner lead finger; an outer lead member; and an intermediate lead portion.
Claim 14
Dependent Claim
43 words
The cavity package of claim 12 wherein said casing covers, said plurality of outer lead trace portions, a portion of said plurality of inner lead trace portions, said plurality of inner lead fingers and a portion of said plurality of intermediate lead portions.
Claim 15
Dependent Claim
31 words
The cavity package of claim 1 wherein each of one of said lead members is attached with an electrically conductive solder to a different one of said plurality of lead traces.
Claim 16
Dependent Claim
162 words
A thermoplastic chip carrier cavity package, said cavity package comprising: a circuit substrate which is laminated with a suitable thermoplastic in order to form a base, said base providing integral reinforcement of said circuit substrate, said circuit substrate comprising: an opening; and a plurality of lead traces each of which are located so as to provide electrical isolation from each other and said opening; a heat sink which is chemically fused to said laminated circuit substrate; a lead frame comprising a plurality of lead members each of which is attached to a different one of said plurality of lead traces; a casing, which is comprised of said suitable thermoplastic, said casing covering said laminated circuit substrate, said heat sink and said lead frame so that a cavity is formed, and said casing being chemically fused to a portion of said base of said laminated circuit substrate; and a lid which is comprised of said suitable thermoplastic and chemically fused to said cavity.
Claim 17
Dependent Claim
162 words
A thermoplastic chip carrier cavity package, said cavity package comprising: a circuit substrate which is laminated with a suitable thermoplastic in order to form a base, said base providing integral reinforcement of said circuit substrate, said circuit substrate comprising: an opening; and a plurality of lead traces each of which are located so as to provide electrical isolation from each other and said opening; a heat sink which is chemically fused to said laminated circuit substrate; a lead frame comprising a plurality of lead members each of which is attached to a different one of said plurality of lead traces; a casing, which is comprised of said suitable thermoplastic, said casing covering said laminated circuit substrate, said heat sink and said lead frame so that a cavity is formed, and said casing being chemically fused to a portion of said base of said laminated circuit substrate; and a lid which is comprised of said suitable thermoplastic and chemically fused to said cavity.
Claim 18
Dependent Claim
29 words
The cavity package of claim 15 wherein said heat sink further includes a top side having a chip die mounting pad located within said opening of said circuit substrate.
Claim 19
Dependent Claim
19 words
The cavity package of claim 16 wherein said top side of said heat sink further includes said suitable thermoplastic.
Claim 20
Dependent Claim
21 words
The cavity package of claim 17 wherein said top side of said heat sink is chemically fused to said circuit substrate.
References Cited (Backward Citations)
US4507907A
Cited
US4545610A
Cited
US4672506A
Cited
US4700276A
Cited
US4700473A
Cited
US4890152A
Cited
US5120473A
Cited
US5152057A
Cited
US4868349A
Cited
US5024372A
Cited
US4940181A
Cited
US5027191A
Cited
US5006673A
Cited
US5011066A
Cited
US5136365A
Cited
US5128746A
Cited
US5136366A
Cited
US5293301A
Cited
US5241133A
Cited
US5153385A
Cited
US5299092A
Cited
US5311402A
Cited
US5278446A
Cited
US5317196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-27 | 1999-05-29 | 1999-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-27 | 2003-05-29 | 2003-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-27 | 2007-05-29 | 2007-11-28 | $7700.00 | Window Closed / Lapsed |