US5324888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal electronic package with reduced seal width
Assignee: Advanced Technology Interconnect Inc
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Filing: 1992-10-13
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Granted: 1994-06-28
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Expires: 2012-10-13
Abstract
Abstract There is provided an electronic package where the package components define a cavity. A semiconductor device and a portion of a leadframe occupy part of the cavity. Substantially the remainder of the cavity is filled with a compliant polymer, such as a silicone gel. Since the cavity is no longer susceptible to gross leak failure, the seal width of adhesives used to assemble the package may be reduced, thereby increasing the area available for mounting the semiconductor device.
Inventors
- 👤 Derek E. Tyler
- 👤 Deepak Mahulikar
- 👤 Anthony M. Pasqualoni
- 👤 Jeffrey S. Braden
- 👤 Paul R. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:45
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; H10W70/00; H10W70/40; H10W72/00; H10W72/30; H10W76/40; H10W76/42; H10W76/47; H10W76/60; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W72/381; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W72/5525; H10W72/851; H10W72/874; H10W72/884; H10W74/00; H10W90/00; H10W90/701; H10W90/731; H10W90/736; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
130 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; a first adhesive having a seal width less than the seal width effective to prevent seal delamination due to the combination of thermal expansion mismatch and cavity pressure variation in the same package absent said compliant polymer bonding said leadframe both to said base and to said window frame; and a cover bonded to said window frame with a second adhesive.
Claim 2
Dependent Claim
130 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; a first adhesive having a seal width less than the seal width effective to prevent seal delamination due to the combination of thermal expansion mismatch and cavity pressure variation in the same package absent said compliant polymer bonding said leadframe both to said base and to said window frame; and a cover bonded to said window frame with a second adhesive.
Claim 3
Dependent Claim
23 words
The electronic package of claim 1 wherein said compliant polymer is selected from the group consisting of viscous liquids, gels and compliant plastics.
Claim 4
Dependent Claim
13 words
The electronic package of claim 2 wherein said compliant polymer is a gel.
Claim 5
Dependent Claim
14 words
The electronic package of claim 3 wherein said compliant polymer is a silicone gel.
Claim 6
Dependent Claim
22 words
The electronic package of claim 2 wherein said second adhesive is selected from the group consisting of thermosetting polymers and thermoplastic polymers.
Claim 7
Dependent Claim
14 words
The electronic package of claim 5 wherein said second adhesive is a thermoplastic polymer.
Claim 8
Dependent Claim
15 words
The electronic package of claim 6 wherein said base, window frame and cover are metallic.
Claim 9
Dependent Claim
17 words
The electronic package of claim 6 wherein said base, window frame and cover are all anodized aluminum.
Claim 10
Dependent Claim
18 words
The electronic package of claim 6 wherein said cover is a glass transparent to a desired electromagnetic radiation.
Claim 11
Dependent Claim
18 words
The electronic package of claim 9 wherein said base is anodized aluminum and said cover is silicon dioxide.
Claim 12
Dependent Claim
112 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a first adhesive bonding said leadframe both to said base and to said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity, and a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive, said second adhesive being a thermoplastic.
Claim 13
Dependent Claim
112 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a first adhesive bonding said leadframe both to said base and to said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity, and a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive, said second adhesive being a thermoplastic.
Claim 14
Dependent Claim
23 words
The electronic package of claim 11 wherein said compliant polymer is selected from the group consisting of viscous liquids, gels and compliant plastics.
Claim 15
Dependent Claim
13 words
The electronic package of claim 12 wherein said compliant polymer is a gel.
Claim 16
Dependent Claim
14 words
The electronic package of claim 13 wherein said compliant polymer is a silicone gel.
Claim 17
Dependent Claim
22 words
The electronic package of claim 12 wherein said first adhesive is selected from the group consisting of thermoplastic polymers and thermosetting polymers.
Claim 18
Dependent Claim
15 words
The electronic package of claim 12 wherein said base, window frame and cover are metallic.
Claim 19
Dependent Claim
17 words
The electronic package of claim 16 wherein said base, window frame and cover are all anodized aluminum.
Claim 20
Dependent Claim
18 words
The electronic package of claim 12 wherein said base is anodized aluminum and said cover is silicon dioxide.
Claim 21
Dependent Claim
125 words
An electronic package, comprising: a base and a window frame defining a cavity; a leadframe disposed between said base and said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; a first adhesive having a seal width less than that effective to prevent seal delamination due to the combination of thermal expansion mismatch and cavity pressure variation in the same package absent said compliant polymer bonding said leadframe both to said base and to said window frame; a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive.
Claim 22
Dependent Claim
125 words
An electronic package, comprising: a base and a window frame defining a cavity; a leadframe disposed between said base and said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; a first adhesive having a seal width less than that effective to prevent seal delamination due to the combination of thermal expansion mismatch and cavity pressure variation in the same package absent said compliant polymer bonding said leadframe both to said base and to said window frame; a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive.
Claim 23
Dependent Claim
15 words
The electronic package of claim 19 wherein said base and said window frame are metallic.
Claim 24
Dependent Claim
19 words
The electronic package of claim 20 wherein said first adhesive has a seal width of less than 3.8 millimeters.
Claim 25
Dependent Claim
23 words
The electronic package of claim 21 wherein said first adhesive has a seal width of from about 1.25 millimeters to about 2.0 millimeters.
Claim 26
Dependent Claim
14 words
The electronic package of claim 21 wherein said compliant polymer is a silicone gel.
Claim 27
Dependent Claim
14 words
The electronic package of claim 21 wherein said second adhesive is a thermoplastic polymer.
Claim 28
Dependent Claim
16 words
The electronic package of claim 24 wherein said base and said window frame are anodized aluminum.
Claim 29
Dependent Claim
12 words
The electronic package of claim 25 wherein said cover is silicon dioxide.
Claim 30
Dependent Claim
115 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a first adhesive having a seal width of less than 3.8 millimeters bonding said leadframe both to said base and to said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; and a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive.
Claim 31
Dependent Claim
115 words
An electronic package, comprising: a base defining the peripheral dimension of said electronic package; a window frame in combination with said base defining a cavity; a leadframe disposed between said base and said window frame; a first adhesive having a seal width of less than 3.8 millimeters bonding said leadframe both to said base and to said window frame; a semiconductor device electrically interconnected to said leadframe, wherein said semiconductor device and a portion of said leadframe occupy a portion of said cavity; a compliant polymer occupying substantially the remainder of said cavity; and a cover formed from a glass transparent to a desired electromagnetic radiation bonded to said window frame with a second adhesive.
Claim 32
Dependent Claim
23 words
The electronic package of claim 27 wherein said first adhesive has a seal width of from about 1.2 millimeters to about 2.0 millimeters.
Claim 33
Dependent Claim
22 words
The electronic package of claim 27 wherein said compliant polymer is selected from the group consisting viscous liquids, gels and complaint plastics.
Claim 34
Dependent Claim
14 words
The electronic package of claim 29 wherein said complaint polymer is a silicone gel.
Claim 35
Dependent Claim
14 words
The electronic package of claim 30 wherein said second adhesive is a thermoplastic polymer.
Claim 36
Dependent Claim
17 words
The electronic package of claim 31 wherein said base, said window frame and said cover are metallic.
Claim 37
Dependent Claim
19 words
The electronic package of claim 32 wherein said base, said window frame and said cover are all anodized aluminum.
Claim 38
Dependent Claim
22 words
The electronic package of claim 31 wherein said base and said window frame are anodized aluminum and said cover is silicon dioxide.
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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) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |