US4561006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit package with integral heating circuit
Assignee: Unisys Corp
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Filing: 1982-07-06
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Granted: 1985-12-24
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Expires: 2002-07-06
Abstract
Abstract An integrated circuit package having an auxiliary heating element incorporated therein is described. The integral heating element is accessible for application of electric power from an external source to cause heating of the integral circuit package to a predetermined level at which solder will melt and flow, thereby allowing removal and reinsertion of the integrated circuit package with relationship to associated pins in a support assembly. The integral heating element provides a means for applying controlled heat to the integrated circuit package such that the package can be unsoldered from or soldered to associated electrical interconnection pins, some of which may be hidden from view or physical access.
Inventors
- 👤 Thomas P. Currie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:32
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/10; H05; H05K; H05K1/00; H05K1/02; H05K1/0201; H05K1/0212; H05K1/03; H05K1/0306; H05K1/16; H05K1/167; H05K2201/00; H05K2201/09; H05K2201/09145; H05K2201/09181; H05K2201/10; H05K2201/10227; H05K2201/10295; H05K2201/10303; H05K2201/10431; H05K2201/10439; H05K2201/10477; H05K2201/10613; H05K2201/10621; H05K2201/10727; H05K2203/00; H05K2203/11; H05K2203/1115; H05K2203/17; H05K2203/176; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3405; H05K3/3447; H05K3/3494; H05K3/36; H05K3/368; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W72/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/851; H10W72/874; H10W72/884; H10W90/00; H10W90/701; H10W90/731; H10W90/734; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
232 words
An improved integrated circuit package having improved capability for installation and removal comprising: a plurality of electrically insulating support members, each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, predetermined ones of said electrically insulating support members having first access apertures, and other predetermined ones of said electrically insulating support members having pin receiving apertures; a further electrically insulating support member positioned between said predetermined ones and said other predetermined ones of said electrically insulating support members; an auxiliary heat generating element deposited in a predetermined pattern on said further electrically insulating support member and having receiving means associated therewith and in cooperative relation to said first access apertures, said auxiliary heat generating element arranged for providing heat at a predetermined level in response to external electrical power applied to said receiving means; said pluarlity of electrically insulating support members and said further electrically insulated support member arranged in juxtaposition such that all of said electrically conductive materials are electrically insulated from said auxiliary heat generating element, and are formed in a unitary body; and interconnection means, including solder connections, for making electrical and physical interconnection between portions of said electrically conductive materials and associated interconnection pins in said pin receiving apertures when said solder is caused to flow in response to said heat at a predetermined level in response to application of said external electrical power.
Claim 2
Dependent Claim
232 words
An improved integrated circuit package having improved capability for installation and removal comprising: a plurality of electrically insulating support members, each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, predetermined ones of said electrically insulating support members having first access apertures, and other predetermined ones of said electrically insulating support members having pin receiving apertures; a further electrically insulating support member positioned between said predetermined ones and said other predetermined ones of said electrically insulating support members; an auxiliary heat generating element deposited in a predetermined pattern on said further electrically insulating support member and having receiving means associated therewith and in cooperative relation to said first access apertures, said auxiliary heat generating element arranged for providing heat at a predetermined level in response to external electrical power applied to said receiving means; said pluarlity of electrically insulating support members and said further electrically insulated support member arranged in juxtaposition such that all of said electrically conductive materials are electrically insulated from said auxiliary heat generating element, and are formed in a unitary body; and interconnection means, including solder connections, for making electrical and physical interconnection between portions of said electrically conductive materials and associated interconnection pins in said pin receiving apertures when said solder is caused to flow in response to said heat at a predetermined level in response to application of said external electrical power.
Claim 3
Dependent Claim
57 words
An integrated circuit package as in claim 11 wherein said auxiliary heat generating means comprises: electrically conductive means exhibiting predetermined electrical resistance characteristics, and responsively coupled to said receiving means and arranged in a predetermined serpentine configuration for applying evenly distributed heat to said unitary body in response to said electrical power applied to said receiving means.
Claim 4
Dependent Claim
48 words
An integrated circuit package as in claim 2 wherein said electrical resistance characteristic is predetermined to raise the temperature of the combination of elements to not more than 200° Centigrade when said electrical power at predetermined levels is predetermiend and externally applied at not more than 15 watts.
Claim 5
Dependent Claim
23 words
An integrated circuit package as in claim 2 wherein said heat generating means is fabricated from a selective one of available refractory metals.
Claim 6
Dependent Claim
213 words
An improved integrated circuit package having improved capability for solder reflow installation and removal comprising: a plurality of ceramic support members each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, and predetermined ones having first access apertures and other predetermined ones having pin receiving apertures; a further ceramic support member positioned between said predetermined ones and said other predetermined ones of saidceramic support members; an auxiliary heat generating element deposited in a predetermined pattern on said further ceramic support member, and having receiving means in cooperation with said first access apertures; said plurality of ceramic support members and said further ceramic support member arranged so that all of said electrically conductive materials are electrically isolated from said heat generating element and co-fired to form a unitary body; interconnection means, including solder connections, for making electrical and physical interconnection between predetermined portions of said electrically conductive material and associated interconnection pins, in said pin receiving apertures; and said receiving means is arranged for receiving external electrical power to be applied to said auxiliary heat generating element for allowing said external electrical power to be applied thereto for raising the temperature of said unitary body to predetermined levels for causing said solder to melt and flow at said interconnection pins.
Claim 7
Dependent Claim
213 words
An improved integrated circuit package having improved capability for solder reflow installation and removal comprising: a plurality of ceramic support members each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, and predetermined ones having first access apertures and other predetermined ones having pin receiving apertures; a further ceramic support member positioned between said predetermined ones and said other predetermined ones of saidceramic support members; an auxiliary heat generating element deposited in a predetermined pattern on said further ceramic support member, and having receiving means in cooperation with said first access apertures; said plurality of ceramic support members and said further ceramic support member arranged so that all of said electrically conductive materials are electrically isolated from said heat generating element and co-fired to form a unitary body; interconnection means, including solder connections, for making electrical and physical interconnection between predetermined portions of said electrically conductive material and associated interconnection pins, in said pin receiving apertures; and said receiving means is arranged for receiving external electrical power to be applied to said auxiliary heat generating element for allowing said external electrical power to be applied thereto for raising the temperature of said unitary body to predetermined levels for causing said solder to melt and flow at said interconnection pins.
Claim 8
Dependent Claim
56 words
An integrated circuit package as in claim 5 wherein said auxiliary heat generating element comprises: electrically conductive means exhibiting predetermined electrical resistance characteristics, and responsively electrically coupled to said receiving means and arranged in a predetermined serpentine configuration for applying evenly distributed heat to said unitary body in response to application of said external electrical power.
Claim 9
Dependent Claim
45 words
An integrated circuit package as in claim 6 wherein said electrical resistance characteristics are predetermined to raise the temperature of said unitary body to not more than 200° Centigrade when said external electrical power is applied at predetermined levels of not more than 15 watts.
Claim 10
Dependent Claim
30 words
An integrated circuit package as in claim 7 wherein said heat generating element is fabricated from a selected one of available refractory metals, and said ceramic support members are alumina.
Claim 11
Dependent Claim
34 words
An improved integrated circuit package as in claim 1 wherein at least some of said pin receiving apertures are hidden from view and direct physical access when connected to associated ones of said pins.
Claim 12
Dependent Claim
34 words
An improved integrated circuit package as in claim 5 wherein at least some of said pin receiving apertures are hidden from view and direct physical access when connected to associated ones of said pins.
Claim 13
Dependent Claim
159 words
An improved integrated circuit package comprising: a plurality of electrically insulated support members, each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, predetermined ones of said support members having pin receiving apertures therein, and said plurality of insulated support members arranged in juxtapostion such that all of said electrically conductive materials are electrically insulated from each other, and are formed in a unitary body; cavity means formed in said unitary body for supporting an associated integrated circuit device, said cavity means opens in the same direction as said pin receiving apertures; and interconnection means, including solder connections, for making electrical and physical interconnection between portions of said electrically conductive materials and associated interconnection pins and the associated integrated circuit device, when at least some of said pin receiving apertures and said cavity means are hidden from view and direct physical access when the integrated circuit package is connected to associated ones of said pins.
Claim 14
Dependent Claim
159 words
An improved integrated circuit package comprising: a plurality of electrically insulated support members, each having predetermined patterns of electrically conductive materials deposited on at least portions thereof, predetermined ones of said support members having pin receiving apertures therein, and said plurality of insulated support members arranged in juxtapostion such that all of said electrically conductive materials are electrically insulated from each other, and are formed in a unitary body; cavity means formed in said unitary body for supporting an associated integrated circuit device, said cavity means opens in the same direction as said pin receiving apertures; and interconnection means, including solder connections, for making electrical and physical interconnection between portions of said electrically conductive materials and associated interconnection pins and the associated integrated circuit device, when at least some of said pin receiving apertures and said cavity means are hidden from view and direct physical access when the integrated circuit package is connected to associated ones of said pins.
Claim 15
Dependent Claim
106 words
An improved integrated circuit package as in claim 11 wherein predetermined ones of said plurality of support members have first access apertures and one of said plurality of support members has an auxiliary heat generating element deposited in a predetermined pattern thereon and includes receiving means associated therewith and in cooperative relation to said first access apertures, said auxiliary heat generating element arranged for providing heat at a predetermined level in response to external electrical power applied to said receiving means, wherein said solder is caused to flow in response to said heat at a predetermined level in response to application of said external electrical power.
Claim 16
Dependent Claim
58 words
An improved integrated circuit package as in claim 12 wherein said auxiliary heat generating element comprises: electrically conductive means exhibiting predetermined electrical resistance characteristics, and responsively coupled to said receiving means and arranged in a predetermined serpentine configuration for applying evenly distributed heat to said unitary body in response to said electrical power applied to said receiving means.
Claim 17
Dependent Claim
39 words
An improved integrated circuit package as in claim 13 wherein said first access apertures are disposed oppositely on said unitary body to said pin receiving apertures and said cavity means for providing ready access to said first access apertures.
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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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |