US4158960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcircuit fine leak test apparatus
Assignee: United States Department of the Army
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Filing: 1978-05-04
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Granted: 1979-06-26
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Expires: 1998-05-04
Abstract
Abstract A plurality of fine leak test chambers for fast individual testing of herically plated microelectronic devices. Each microcircuit component, having already been subjected to a controlled environment of 5 percent helium and 95 percent nitrogen and then assembled, is placed in the chambers and sealed therein. The chambers are evacuated and helium flow rate (if present) is measured by a spectrometer.
Inventors
- 👤 James W. White
- 👤 Victor W. Ruwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:03
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/202; G01M3/205
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
Apparatus for fine leak testing of sealed tracer gas-filled microcircuit packages comprising: (a) a frame disposed for support of a stationary base member and a movable top member: (b) a plurality of test chambers disposed in said stationary base member with each test chamber closed by a movable top in said movable top member to receive said microcircuit packages therein; (c) vacuum pump means connected to a bottom portion in each said test chambers for evacuation thereof; (d) switching means disposed between said vacuum pump means and said test chambers for sequential evacuation of said test chambers; and, (e) means communicating with each test chamber for testing the seal of said microcircuit package by measuring the tracer gas leak rate from said package.
Claim 2
Dependent Claim
123 words
Apparatus for fine leak testing of sealed tracer gas-filled microcircuit packages comprising: (a) a frame disposed for support of a stationary base member and a movable top member: (b) a plurality of test chambers disposed in said stationary base member with each test chamber closed by a movable top in said movable top member to receive said microcircuit packages therein; (c) vacuum pump means connected to a bottom portion in each said test chambers for evacuation thereof; (d) switching means disposed between said vacuum pump means and said test chambers for sequential evacuation of said test chambers; and, (e) means communicating with each test chamber for testing the seal of said microcircuit package by measuring the tracer gas leak rate from said package.
Claim 3
Dependent Claim
20 words
Apparatus as in claim 1 wherein said means for testing the seal of said microcircuit package is a mass spectrometer.
Claim 4
Dependent Claim
36 words
Apparatus as in claim 2 including a plurality of test chamber base members secured to said stationary base member, and, support means carried in said test chamber base members for support of said microcircuit packages thereon.
Claim 5
Dependent Claim
45 words
Apparatus as in claim 3 wherein said movable top member is disposed in slidable relation with said frame, said movable top member including a plurality of chambers disposed for alignment and sealed relationship with said test chamber base members prior to evacuation of said chambers.
Claim 6
Dependent Claim
53 words
Apparatus as in claim 4 wherein said movable top member includes a top plate, an upper plate, and a third plate, means for securing said upper and third plate in biased relation, and means for moving said upper plate against the bias of said biasing means for the sealed relation of said chambers.
References Cited (Backward Citations)
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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) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |