Patent US4884027A successfully refreshed from Google Patents.
US4884027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual microcircuit die test system
Assignee: United States Department of the Army
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Filing: 1988-10-27
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Granted: 1989-11-28
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Expires: 2008-10-27
Abstract
Abstract A system for testing semiconductor microchips is provided in which indivil microchips can be tested electrically and under specific thermal conditions simultaneously to determine the reliability of the microchip under operating conditions. This system is unique and economically operable so as to enable all individual chips to be tested prior to mounting in larger assemblies.
Inventors
- 👤 Daron C. Holderfield
- 👤 Bernard E. Martin
- 👤 Samuel S. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:59
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/2851; G01R31/2855; G01R31/286; G01R31/2868
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
A microcircuit die test system comprising: a die table with means thereon for accurately mounting a test specimen, means for positioning said die table in a position for testing, a test chamber device having means for being positioned relative to said die table to enable electrical test to be made of the test specimen, means for injecting media onto the test specimen to subject the test specimen to selected temperatures, means for positioning the test chamber device relative to said die table, means mounted relative to said test chamber device for adjusting said test chamber device in x and y axes, and means for viewing through said test chamber device to the specimen on said die table.
Claim 2
Dependent Claim
117 words
A microcircuit die test system comprising: a die table with means thereon for accurately mounting a test specimen, means for positioning said die table in a position for testing, a test chamber device having means for being positioned relative to said die table to enable electrical test to be made of the test specimen, means for injecting media onto the test specimen to subject the test specimen to selected temperatures, means for positioning the test chamber device relative to said die table, means mounted relative to said test chamber device for adjusting said test chamber device in x and y axes, and means for viewing through said test chamber device to the specimen on said die table.
Claim 3
Dependent Claim
67 words
A microcircuit die test system as set forth in claim 1, wherein said means for positioning said die table includes a rotatably mounted rotary table with two of said die tables located on opposite ends of said rotary table, and electro-magnetic means for holding said rotary table in predetermined positions that are 180 degrees apart with one of said die tables being mounted in said test position.
Claim 4
Dependent Claim
37 words
A microcircuit die test system as set forth in claim 2, wherein said means for positioning said test chamber includes an electric motor means for moving said test chamber device up and down about a z axis.
Claim 5
Dependent Claim
45 words
A microcircuit die test system as set forth in claim 3, wherein said means for viewing includes a video camera mounted relative to said test chamber device and said video camera being connected to a video monitor for monitoring the specimen on said die table.
Claim 6
Dependent Claim
31 words
A microcircuit die test system as set forth in claim 4, wherein said test chamber device includes an opening for introduction of media therein and outlet ports for exhausting said media.
Claim 7
Dependent Claim
37 words
A microcircuit die test system as set forth in claim 5, wherein said test chamber device has electrical leads leading there from and connected to an electrical test control equipment for conducting electrical test on the specimen.
Claim 8
Dependent Claim
51 words
A microcircuit die test system as set forth in claim 6, wherein a computer is provided and is connected to said video monitor, said means for injecting said media, and said test control equipment for controlling each of these items as commanded to perform the task of each of these items.
Claim 9
Dependent Claim
26 words
A microcircuit die test system as set forth in claim 7, wherein said means for positioning has a light source mounted thereon for said video camera.
Claim 10
Independent Claim
81 words
A system for testing a microchip comprising: means for mounting the microchip in a predetermined position, a test chamber device including electrical means for testing the microchip, thermal means for adjusting the test temperature of the microchip; and means mounting said test chamber device for movement into an adjusted position in engagement with said means for mounting the microchip to enable said microchip to be electrically tested and have the temperature of the microchip adjusted to a plurality of different temperatures.
Claim 11
Independent Claim
81 words
A system for testing a microchip comprising: means for mounting the microchip in a predetermined position, a test chamber device including electrical means for testing the microchip, thermal means for adjusting the test temperature of the microchip; and means mounting said test chamber device for movement into an adjusted position in engagement with said means for mounting the microchip to enable said microchip to be electrically tested and have the temperature of the microchip adjusted to a plurality of different temperatures.
Claim 12
Dependent Claim
33 words
A system for testing a microchip as set forth in claim 9, wherein said test chamber device has means mounted relative thereto to enable viewing of the microchip when in the testing position.
Claim 13
Dependent Claim
25 words
A system for testing a microchip as set forth in claim 10, wherein said viewing means includes a video camera mounted for viewing the microchip.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |