US3794912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact device using conductive fluid for measuring resistance and capacitance of semiconductor
Assignee: US Philips Corp
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Filing: 1972-05-15
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Granted: 1974-02-26
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Expires: 1992-05-15
Abstract
Abstract A contact device comprising an insulating block having a flat upper surface which forms a place for receiving a semiconductor body, in which block at least one duct is present which opens into the upper surface and forms a contact place there, the block comprising a storage container for an electrically conductive liquid, for example mercury, communicating with the duct, said liquid being forced to the contact place by means of a gas under pressure in the duct, an electric conductor being passed through the block of which one end is connected to the liquid and the other end can be connected to a measuring instrument. The contact device may advantageously be used in carrying out a capacityvoltage measurement or a spreading resistance measurement in semiconductor materials.
Inventors
- 👤 P Severin
- 👤 G Poodt
- 👤 G Vermeulen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A device for making temporary non-destructive electrical contact with a semiconductor body, comprising an insulating block having an upper surface for receiving said body, said block having at least one duct opening into said upper surface, said opening forming a contact place, said block further comprising a storage container for an electrically conductive liquid communicating with said duct, means for forcing liquid from said storage container through said duct to said contact place, and an externally available electrical conductor leading into said block for making electrical contact with liquid in said duct, whereby said externally available electrical conductor is in electrical contact with a body resting on said upper surface when electrically conductive liquid is forced through said duct and into contact with said body.
Claim 2
Independent Claim
125 words
A device for making temporary non-destructive electrical contact with a semiconductor body, comprising an insulating block having an upper surface for receiving said body, said block having at least one duct opening into said upper surface, said opening forming a contact place, said block further comprising a storage container for an electrically conductive liquid communicating with said duct, means for forcing liquid from said storage container through said duct to said contact place, and an externally available electrical conductor leading into said block for making electrical contact with liquid in said duct, whereby said externally available electrical conductor is in electrical contact with a body resting on said upper surface when electrically conductive liquid is forced through said duct and into contact with said body.
Claim 3
Dependent Claim
34 words
A device as defined in claim 1 wherein said means for forcing liquid comprises a gas inlet in communication with said storage container for admitting gas under pressure to force liquid through said duct.
Claim 4
Dependent Claim
92 words
A device as defined in claim 2 for making more than one temporary non-destructive electrical contact with a semiconductor body, wherein said block has more than one duct opening into said upper surface at predetermined spaced locations, a separate storage container for electrically conductive liquid communicating with each of said more than one duct, a separate externally available electrical conductor leading into each of said more than one duct, and a gas inlet communicating with the storage containers for admitting gas under pressure to force liquid through said more than one duct.
Claim 5
Dependent Claim
84 words
A device as defined in claim 2 for making more than one temporary non-destructive electrical contact with a semiconductor body, wherein said block has more than one duct opening into said upper surface at predetermined spaced locations, a separate externally available electrical conductor leading into each of said more than one duct, each of said more than one duct separately communicating with said storage container at locations where liquid will enter said more than one duct upon tilting of said block and not otherwise.
Claim 6
Dependent Claim
28 words
A device as defined in claim 2 for making an electrical measurement and further comprising means for electrically contacting the surface of said body remote from said block.
Claim 7
Dependent Claim
74 words
A device as defined in claim 5 wherein said means for electrically contacting comprises: an arm pivotably mounted to swing toward said upper surface of said block; a spring attached between said arm and a support for urging said arm toward said upper surface; a contact pin mounted at the end of said arm for making electrical contact with a body resting on said upper surface; and terminal means electrically connected with said pin.
Claim 8
Dependent Claim
20 words
A device as defined in claim 6 further comprising a cam for moving said arm away from said upper surface.
Claim 9
Dependent Claim
16 words
A devIce as defined in claim 7 wherein the urging force of said spring is adjustable.
References Cited (Backward Citations)
US1897330A
Cited
US2740099A
Cited
GB1022463A
Cited
US3315156A
Cited
US3452275A
Cited
US3649488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |