US4547624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reducing package height for microcircuit packages
Assignee: ISOTRONICS Inc INDUSTRIAL PARK NEW BEDFORD MA 02745 A CORP
•
Filing: 1983-12-02
•
Granted: 1985-10-15
•
Expires: 2003-12-02
Abstract
Abstract An offset weld ring is brazed or soldered to the top surface of a flat pack frame to provide an offset weld surface for the welding of a lid to the package in which the heat applied during the welding process is moved away from the glass feedthroughs in the package, thereby permitting closer spacing of the lid to the glass feedthrough for minimizing overall package height and obtaining a low profile package.
Inventors
- 👤 Steven A. Tower
- 👤 Jay S. Greenspan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:24
CPC Classifications
H; H05; H05K; H05K5/00; H05K5/06; H05K5/066; H10; H10W; H10W76/00; H10W76/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A method of minimizing package height for microcircuit packages comprising the steps of: providing a flat pack frame having at least one wall carrying at least one feedthrough; affixing an offset weld ring to the top surface of the flat pack frame, the weld ring extending past the wall of the flat pack frame carrying a feedthrough; and welding a lid to the offset weld ring at the periphery of the weld ring, whereby the heat of welding is removed from the feedthrough such that the distance between the top of the feedthrough to the top surface of the frame can be minimized.
Claim 2
Independent Claim
103 words
A method of minimizing package height for microcircuit packages comprising the steps of: providing a flat pack frame having at least one wall carrying at least one feedthrough; affixing an offset weld ring to the top surface of the flat pack frame, the weld ring extending past the wall of the flat pack frame carrying a feedthrough; and welding a lid to the offset weld ring at the periphery of the weld ring, whereby the heat of welding is removed from the feedthrough such that the distance between the top of the feedthrough to the top surface of the frame can be minimized.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the lid is stepped at its periphery.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein the offset weld ring and the frame are made of the same material.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein said material is nickel-iron-cobalt alloy.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the periphery of the lid matches that of the offset weld ring.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the offset weld ring includes an annular weld projection.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the offset weld ring is brazed to the frame.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein the offset weld ring is soldered to the frame.
Claim 10
Dependent Claim
72 words
The microcircuit package comprising: a rectangular frame having at least one upstanding well and an annular top surface such that said frame surrounds a predetermined area; a feedthrough mounted through said wall; a base secured to said frame; a separate offset weld ring secured to the top surface of said frame, said weld ring extending past the wall carrying said feedthrough; and a lid welded to the periphery of said weld ring.
Claim 11
Dependent Claim
72 words
The microcircuit package comprising: a rectangular frame having at least one upstanding well and an annular top surface such that said frame surrounds a predetermined area; a feedthrough mounted through said wall; a base secured to said frame; a separate offset weld ring secured to the top surface of said frame, said weld ring extending past the wall carrying said feedthrough; and a lid welded to the periphery of said weld ring.
Claim 12
Dependent Claim
27 words
The package of claim 9 wherein said lid is stepped at its periphery so that the central portion thereof extends into the area surrounded by said frame.
Claim 13
Dependent Claim
13 words
The package of claim 9 wherein said ring includes an annular weld projection.
Claim 14
Dependent Claim
38 words
The package of claim 9 wherein said ring, frame and lid are of nickel-iron-cobalt alloy and wherein the distance between the top of a feedthrough and the top surface of said frame is 15 thousandths of an inch.
References Cited (Backward Citations)
US4008945A
Cited
US4266089A
Cited
US4266090A
Cited
US4262300A
Cited
US4331253A
Cited
US4412093A
Cited
US4453033A
Cited
US4451540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |