US4891578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the electrical function testing of wiring matrices, particularly of printed circuit boards
Assignee: Siemens AG
•
Filing: 1988-03-16
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Granted: 1990-01-02
•
Expires: 2008-03-16
Abstract
Abstract A device for the electrical function testing of wiring matrices, particularly of printed circuit boards. In the electrical function testing of wiring matrices, particularly of printed circuit boards, the contacting of selected measuring locations results via gas discharging channels. The plurality of leads required for the selection of the individual measuring locations is drastically reduced. In the new device, every gas discharge channel is selectable by an associated busbar and by the controllable charging with light of a photoconductor arranged between the gas discharge channel and the associated busbar.
Inventors
- 👤 Guenter Doemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/07; G01R1/072
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
129 words
A device for use in a system for the electrical function testing of wiring matrices, the device having a carrier plate located adjacent the wiring matrix and provided with a plurality of gas discharge channels, whereby at least two selected measuring locations of the wiring matrix are ionically contacted via the associated gas discharge channels, comprising every gas discharge channel selectable by an associated busbar of at least two busbars on the carrier plate and for at least each selected gas discharge channel a photoconductor on the carrier plate connected between the selected gas discharge channel and the associated busbar, the photoconductor being controlled by charging with light, wherein the system has means for providing the light and means for testing the two selected measuring locations via the busbars.
Claim 2
Independent Claim
129 words
A device for use in a system for the electrical function testing of wiring matrices, the device having a carrier plate located adjacent the wiring matrix and provided with a plurality of gas discharge channels, whereby at least two selected measuring locations of the wiring matrix are ionically contacted via the associated gas discharge channels, comprising every gas discharge channel selectable by an associated busbar of at least two busbars on the carrier plate and for at least each selected gas discharge channel a photoconductor on the carrier plate connected between the selected gas discharge channel and the associated busbar, the photoconductor being controlled by charging with light, wherein the system has means for providing the light and means for testing the two selected measuring locations via the busbars.
Claim 3
Dependent Claim
25 words
The device according to claim 1, wherein the photoconductors associated with the gas discharge channels are connected to one another in rows via the busbars.
Claim 4
Dependent Claim
26 words
The device according to claim 1, wherein the busbars are oriented transversely relative to the principle directions (X, Y) of the wiring matrices to be tested.
Claim 5
Dependent Claim
31 words
The device according to claim 1, wherein each busbar is connected to two lines via two photoresistors, respectively, and wherein every photoresistor can be charged with light in a controllable fashion.
Claim 6
Dependent Claim
17 words
The device according to claim 1, wherein the busbars are arcuately formed around the gas discharge channels.
Claim 7
Dependent Claim
17 words
The device according to claim 1, wherein the photoconductors are arcuately formed around the gas discharge channels.
Claim 8
Dependent Claim
14 words
The device according to claim 1, wherein the photoconductors are composed of cadmium sulfide.
Claim 9
Dependent Claim
19 words
The device according to claim 1, wherein the photoconductors are connected to associated electrodes of the gas discharge channels.
Claim 10
Dependent Claim
14 words
The device according to claim 1, wherein the busbars are manufactured using thin-film technology.
Claim 11
Dependent Claim
14 words
The device according to claim 1, wherein the photoconductors are manufactured using thin-film technology.
Claim 12
Dependent Claim
15 words
The device according to one claim 4, wherein the photoresistors are manufactured using thin-film technology.
Claim 13
Dependent Claim
14 words
The device according to claim 4, wherein both lines are manufactured using thin-film technology.
Claim 14
Dependent Claim
26 words
The device according to claim 4, wherein the busbars, the photoconductors, the photoresistors and the two lines are applied to the carrier plate using thin-film technology.
Claim 15
Dependent Claim
17 words
The device according to claim 1, wherein the photoconductors can be charged with light via a mask.
Claim 16
Dependent Claim
17 words
The device according to claim 4, wherein the photoresistors can be charged with light via a mask.
Claim 17
Dependent Claim
18 words
The device according to claim 1, wherein the photoconductors can be charged with light via a deflectable beam.
Claim 18
Dependent Claim
18 words
The device according to claim 4, wherein the photoresistors can be charged with light via a deflectable beam.
Claim 19
Dependent Claim
16 words
The device according to claim 16, wherein the beam is formed by a focusable laser beam.
Claim 20
Dependent Claim
16 words
The device according to claim 16, wherein an acousto-optical deflector is provided for deflecting the beam.
Claim 21
Dependent Claim
14 words
The device according to claim 16, wherein the photoconductors are serially chargeable with light.
Claim 22
Dependent Claim
14 words
The device according to claim 17, wherein the photoresistors are serially chargeable with light.
Claim 23
Dependent Claim
30 words
The device according to claim 4, wherein the photoconductors and the photoresistors are serially chargeable with light, the photoconductors and the photoresistors being charged with light via a deflectable beam.
Claim 24
Dependent Claim
14 words
The device according to claim 1, wherein the photoconductors are composed of cadmium selenide.
References Cited (Backward Citations)
US3764898A
Cited
US3956698A
Cited
US4047077A
Cited
US4464627A
Cited
EP0102565A2
Cited
US4777432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |